Welcome back to BirdCast’s weekly Regional Migration Reports! We’ve been a bit delayed in posting this season, with migration clearly more than a month in action. The team has been busy, collaborating with colleagues in the European Network for the Radar Surveillance of Animal Movements (see this paper) and Oklahoma University’s Animal Migration Research Group. We have also been gearing up for the next installation in the BirdCast universe of research, BirdVox, a collaboration with NYU (check it out here and here). But now . . . on to the excitement . . . Buff-breasted Sandpiper, Common Nighthawk, Red-eyed Vireo, Warbling Vireo, Veery, Gray Catbird, Tennessee Warbler, Magnolia Warbler, Pine Warbler, Wilson’s Warbler, MacGillivray’s Warbler, among numerous others, have been on the move this week across the country; and below, without further ado, we present to you our first installment for Fall 2016.
Olive-sided Flycatcher, eBird S31226573, Sue Barth/Macaulay Library.
Continental Summary
Locally favorable migration conditions increase in extent over the course of the work week in the East and feature Common Nighthawk, Ruby-throated Hummingbird, Olive-sided Flycatcher, Eastern Wood-Pewee, Great Crested Flycatcher, Prothonotary Warbler, and Northern Waterthrush, while conditions in the west remain largely marginal for migration, with locally favorable patches featuring movements of Greater Yellowlegs, Western Sandpiper, Red-necked Phalarope, Warbling Vireo, Yellow Warbler, MacGillivray’s Warbler, and Western Tanager.
Arrows show wind speed and direction (arrow points in the direction to which wind is blowing) 100 m above ground level. Areas with southerly winds are colored red; northerly winds colored blue. Accumulated precipitation (in 6 hour intervals) is green, outlined by white. Broadly speaking, areas of the map in blue will experience conditions that are favorable for migration, and areas where blue and green (and red and blue) intersect and overlap may experience migrant concentrations and fallouts as migrants interact with precipitation.
We use data collected by eBird users help make more accurate forecasts. If you enjoy the predictions contained in these posts, please consider submitting your own bird sightings to eBird to even further improve the content. Every observation counts, whether it be a single bird at a feeder in your backyard, or an entire day spent in a national park. To get started with eBird, head on over to the site!
Additionally, please note that photographs and other digital media showing birds come from the Macaulay Library, which receives credit along with the photographer/observer in the media caption as part of a new initiative that allows public contribution, access and use of natural history media.
Need a review of our definitions for regions, species on the move, and migration amounts? Please visit this link.
Quick Links to Regions
Upper Midwest and Northeast |
Gulf Coast and Southeast |
Great Plains |
West |
Upper Midwest and Northeast
Favorable conditions for moderate to locally heavy flights kick off the weekend, but these conditions quickly turn unfavorable as warmer and wetter air builds from the south. The beginning of the work week will see isolated areas of moderate flights. However, by Tuesday night a larger and more extensive area of favorable migration conditions spreads into the region, with calm and northerly winds facilitating moderate to heavy flights. These conditions will continue, as will nocturnal flights, through the remainder of the period across much of the region, particularly to the east of the Appalachians. Friday morning has the best potential for morning flight, most notably in New England.
As an aside, birders in northeastern North America should be watching the North Atlantic Oscillation indices carefully (here), as the patterns that they exhibit suggest the potential for some European vagrancy. High pressure in the north Atlantic has been creating some favorable flow to the west across the Atlantic, and earlier this summer such flow probably delivered a Common Swift to Newfoundland and a European Golden-Plover to New Jersey . . .
Ruby-throated Hummingbird, eBird S31222657, Steve Kelling/Macaulay Library.
Species on the Move
Beginning Arrivals What is this?
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Bald Eagle | ** | Before July 1 | 9/2 | 11/6 | - | - |
| Northern Harrier | ** | 8/1 | 9/26 | 10/20 | 11/10 | 11/27 |
| Cooper's Hawk | *** | 8/3 | 9/10 | 10/7 | 11/2 | 11/16 |
| Wilson's Snipe | * | 8/6 | 10/1 | 10/16 | 11/2 | 11/19 |
| Northern Shoveler | ** | 8/9 | 10/15 | 11/10 | 12/1 | 12/16 |
| Red-breasted Nuthatch | *** | 8/9 | 9/9 | 10/2 | - | - |
| Black-and-white Warbler | *** | 8/10 | 8/28 | 9/13 | 10/2 | 10/14 |
| Sora | * | 8/12 | 8/28 | 9/21 | 10/16 | 10/30 |
| Turkey Vulture | *** | 8/16 | 9/5 | 9/28 | 10/31 | 11/25 |
| Tennessee Warbler | *** | 8/16 | 8/30 | 9/16 | 10/4 | 10/18 |
| Merlin | *** | 8/19 | 9/4 | 9/28 | 10/26 | 11/16 |
| Yellow-throated Warbler | * | 8/19 | 8/29 | 9/12 | 9/30 | 10/12 |
| Magnolia Warbler | ****! | 8/20 | 9/1 | 9/17 | 10/3 | 10/15 |
| Sabine's Gull | * | 8/22 | 9/2 | 9/16 | 10/1 | 10/10 |
| Red-headed Woodpecker | * | 8/22 | 9/1 | 9/13 | 10/2 | 10/14 |
| Philadelphia Vireo | *** | 8/22 | 9/3 | 9/17 | 10/2 | 10/12 |
| Nashville Warbler | *** | 8/22 | 9/5 | 9/21 | 10/9 | 10/23 |
| Cape May Warbler | *** | 8/22 | 9/4 | 9/19 | 10/5 | 10/17 |
| Bay-breasted Warbler | *** | 8/22 | 9/2 | 9/16 | 10/2 | 10/13 |
| Black-throated Blue Warbler | *** | 8/22 | 9/6 | 9/23 | 10/12 | 10/26 |
| Pine Warbler | *** | 8/22 | 9/5 | 9/22 | 10/11 | 10/25 |
| Parasitic Jaeger | * | 8/23 | 9/6 | 9/25 | 11/15 | 11/30 |
| Wood Thrush | ** | 8/23 | 8/30 | 9/11 | 9/28 | 10/15 |
| Scarlet Tanager | *** | 8/23 | 9/2 | 9/15 | 10/3 | 10/15 |
| Red-shouldered Hawk | ** | 8/24 | 9/5 | 9/22 | 11/13 | 11/22 |
| Monk Parakeet | * | 8/24 | 9/23 | 11/4 | 12/10 | - |
| Swainson's Thrush | *** | 8/24 | 9/4 | 9/19 | 10/5 | 10/16 |
| Black-throated Green Warbler | *** | 8/24 | 9/5 | 9/20 | 10/7 | 10/19 |
| Blue Jay | ****! | 8/25 | 9/8 | 9/28 | 10/16 | - |
| Connecticut Warbler | * | 8/25 | 9/5 | 9/19 | 10/5 | 10/16 |
| Common Yellowthroat | *** | 8/25 | 9/3 | 9/18 | 10/9 | 10/24 |
| Northern Parula | *** | 8/25 | 9/6 | 9/20 | 10/6 | 10/18 |
| Summer Tanager | * | 8/25 | 9/3 | 9/16 | 10/3 | 10/15 |
| Sharp-shinned Hawk | *** | 8/26 | 9/10 | 10/7 | 11/8 | 11/22 |
| Broad-winged Hawk | *** | 8/26 | 9/5 | 9/18 | 10/3 | 10/14 |
| Rose-breasted Grosbeak | *** | 8/26 | 9/5 | 9/16 | 10/3 | 10/14 |
| American Kestrel | *** | 8/27 | 9/10 | 9/28 | 10/19 | 11/5 |
| Brown Thrasher | *** | 8/27 | 9/7 | 9/21 | 10/7 | 10/20 |
| Blackpoll Warbler | *** | 8/27 | 9/7 | 9/23 | 10/9 | 10/21 |
| Northern Flicker | ****! | 8/28 | 9/9 | 9/26 | 10/13 | 10/30 |
| House Wren | *** | 8/28 | 9/4 | 9/15 | 10/7 | 10/23 |
| Gray Catbird | *** | 8/28 | 9/6 | 9/17 | 10/9 | 10/24 |
| Gray-cheeked Thrush | ** | 8/29 | 9/8 | 9/23 | 10/8 | 10/19 |
| Northern Pintail | ** | 9/1 | 10/3 | 10/31 | 11/20 | 12/11 |
| Sedge Wren | * | 9/1 | 9/20 | 10/5 | 10/24 | 11/1 |
| Marsh Wren | NA | 9/1 | 9/20 | 10/5 | 10/24 | - |
| Lapland Longspur | * | 9/3 | 9/15 | 11/10 | - | - |
| Great Cormorant | * | 9/3 | 11/12 | After Dec 31 | - | - |
| Eastern Phoebe | *** | 9/4 | 9/16 | 9/30 | 10/20 | 11/3 |
| Palm Warbler | *** | 9/4 | 9/18 | 10/5 | 10/22 | 11/4 |
Peaking Arrivals
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Red Knot | * | - | Before July 1 | 8/28 | 9/15 | 9/28 |
| Sanderling | ** | - | Before July 1 | 9/1 | 9/23 | 10/6 |
| Belted Kingfisher | ** | Before July 1 | 7/27 | 9/20 | 10/14 | - |
| Blue-winged Warbler | * | 8/1 | 8/13 | 8/28 | 9/14 | 9/27 |
| Ruby-throated Hummingbird | *** | 7/30 | 8/14 | 8/28 | 9/21 | 10/5 |
| Mourning Warbler | * | 8/4 | 8/15 | 9/1 | 9/21 | 10/7 |
| Olive-sided Flycatcher | * | 8/4 | 8/16 | 8/30 | 9/15 | 9/27 |
| Eastern Wood-Pewee | *** | 8/5 | 8/16 | 8/29 | 9/22 | 10/9 |
| Canada Warbler | ** | 8/5 | 8/16 | 8/30 | 9/15 | 9/26 |
| Bobolink | ** | 8/5 | 8/16 | 8/31 | 9/19 | 10/15 |
| Baird's Sandpiper | ** | 8/6 | 8/17 | 8/30 | 9/15 | 9/25 |
| Common Nighthawk | *** | 8/7 | 8/17 | 8/31 | 9/14 | 9/25 |
| Blue-winged Teal | ** | 8/4 | 8/18 | 9/9 | 10/22 | 11/6 |
| Least Flycatcher | ** | 8/7 | 8/18 | 9/3 | 9/22 | 10/5 |
| Buff-breasted Sandpiper | * | 8/10 | 8/20 | 9/3 | 9/17 | 9/28 |
| Yellow-bellied Flycatcher | * | 8/9 | 8/20 | 9/5 | 9/21 | 10/4 |
| Eastern Whip-poor-will | * | 8/16 | 8/21 | 8/30 | 9/19 | 10/2 |
| Warbling Vireo | *** | 8/13 | 8/21 | 9/3 | 9/19 | 9/30 |
| Kentucky Warbler | * | 8/15 | 8/21 | 8/31 | 9/17 | 9/29 |
| Prairie Warbler | * | 8/4 | 8/21 | 9/9 | 9/30 | 10/13 |
| Green-winged Teal | ** | 8/8 | 8/22 | 10/27 | 11/22 | 12/10 |
| Veery | ** | 8/13 | 8/22 | 9/5 | 9/22 | 10/5 |
| Golden-winged Warbler | * | 8/11 | 8/22 | 9/7 | 9/23 | 10/5 |
| American Golden-Plover | ** | 8/11 | 8/23 | 9/10 | 9/27 | 10/13 |
| Blackburnian Warbler | ** | 8/10 | 8/23 | 9/8 | 9/27 | 10/9 |
| Northern Waterthrush | ** | 7/28 | 8/24 | 9/10 | 9/30 | 10/12 |
| Chestnut-sided Warbler | *** | 8/11 | 8/24 | 9/9 | 9/27 | 10/9 |
| Yellow-throated Vireo | ** | 8/16 | 8/25 | 9/8 | 9/26 | 10/8 |
| Red-eyed Vireo | *** | 8/15 | 8/25 | 9/7 | 9/28 | 10/13 |
| Ovenbird | ** | 8/11 | 8/26 | 9/13 | 10/2 | 10/14 |
| Hooded Warbler | * | 8/17 | 8/26 | 9/9 | 9/27 | 10/10 |
| Wilson's Warbler | *** | 8/15 | 8/26 | 9/11 | 9/28 | 10/9 |
| White-eyed Vireo | ** | 8/17 | 8/27 | 9/10 | 9/28 | 10/10 |
| American Redstart | *** | 8/12 | 8/27 | 9/11 | 9/30 | 10/12 |
| Sora | * | 8/12 | 8/28 | 9/21 | 10/16 | 10/30 |
| Black-and-white Warbler | *** | 8/10 | 8/28 | 9/13 | 10/2 | 10/14 |
| Yellow-throated Warbler | * | 8/19 | 8/29 | 9/12 | 9/30 | 10/12 |
| Wood Thrush | ** | 8/23 | 8/30 | 9/11 | 9/28 | 10/15 |
| Tennessee Warbler | *** | 8/16 | 8/30 | 9/16 | 10/4 | 10/18 |
| Red-headed Woodpecker | * | 8/22 | 9/1 | 9/13 | 10/2 | 10/14 |
| Magnolia Warbler | *** | 8/20 | 9/1 | 9/17 | 10/3 | 10/15 |
| Bald Eagle | * | Before July 1 | 9/2 | 11/6 | - | - |
| Sabine's Gull | * | 8/22 | 9/2 | 9/16 | 10/1 | 10/10 |
| Bay-breasted Warbler | *** | 8/22 | 9/2 | 9/16 | 10/2 | 10/13 |
| Scarlet Tanager | *** | 8/23 | 9/2 | 9/15 | 10/3 | 10/15 |
| Philadelphia Vireo | *** | 8/22 | 9/3 | 9/17 | 10/2 | 10/12 |
| Common Yellowthroat | *** | 8/25 | 9/3 | 9/18 | 10/9 | 10/24 |
| Summer Tanager | * | 8/25 | 9/3 | 9/16 | 10/3 | 10/15 |
| Merlin | ** | 8/19 | 9/4 | 9/28 | 10/26 | 11/16 |
| House Wren | ** | 8/28 | 9/4 | 9/15 | 10/7 | 10/23 |
| Swainson's Thrush | *** | 8/24 | 9/4 | 9/19 | 10/5 | 10/16 |
| Cape May Warbler | ** | 8/22 | 9/4 | 9/19 | 10/5 | 10/17 |
Beginning Departures
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Mississippi Kite | * | - | - | Before July 1 | 9/4 | 9/18 |
| Yellow-billed Cuckoo | * | - | - | Before July 1 | 10/3 | 10/17 |
| Tree Swallow | *** | - | - | Before July 1 | 8/30 | 11/10 |
| Cliff Swallow | * | - | - | Before July 1 | 8/29 | 9/18 |
| Roseate Tern | * | - | Before July 1 | 7/20 | 9/1 | 9/23 |
| Willet | * | - | Before July 1 | 7/21 | 9/6 | 9/21 |
| Black Skimmer | * | - | Before July 1 | 7/23 | 9/22 | 10/21 |
| Common Gallinule | * | - | Before July 1 | 7/26 | 9/12 | 11/2 |
| Black-necked Stilt | * | - | Before July 1 | 7/28 | 9/4 | 9/19 |
| Short-billed Dowitcher | ** | - | Before July 1 | 7/29 | 9/10 | 9/23 |
| American Oystercatcher | * | - | Before July 1 | 7/29 | 8/30 | 9/25 |
| Whimbrel | * | Before July 1 | 7/9 | 8/1 | 9/18 | 10/4 |
| Bank Swallow | ** | - | Before July 1 | 8/1 | 8/28 | 9/15 |
| Clapper Rail | * | - | Before July 1 | 8/1 | 8/28 | 10/29 |
| Killdeer | *** | - | Before July 1 | 8/2 | 10/28 | 11/26 |
| Yellow-crowned Night-Heron | * | - | Before July 1 | 8/3 | 10/8 | 10/28 |
| Barn Swallow | *** | Before July 1 | 7/22 | 8/4 | 8/30 | 9/16 |
| Chimney Swift | *** | - | - | 8/5 | 10/10 | 10/25 |
| Blue Grosbeak | * | Before July 1 | 7/18 | 8/5 | 8/31 | 10/17 |
| Spotted Sandpiper | *** | Before July 1 | 7/1 | 8/6 | 9/5 | 9/24 |
| Snowy Egret | ** | - | Before July 1 | 8/7 | 10/15 | 11/3 |
| Great Blue Heron | *** | - | Before July 1 | 8/10 | 10/19 | 12/8 |
| Tricolored Heron | * | 7/14 | 7/26 | 8/11 | 10/7 | 10/22 |
| Upland Sandpiper | * | 7/26 | 8/1 | 8/11 | 8/29 | 9/12 |
| Great Egret | *** | Before July 1 | 7/11 | 8/12 | 10/19 | 11/6 |
| Ruddy Turnstone | ** | Before July 1 | 7/25 | 8/12 | 8/29 | 9/17 |
| Green Heron | *** | - | Before July 1 | 8/13 | 9/15 | 10/7 |
| Solitary Sandpiper | ** | Before July 1 | 7/11 | 8/13 | 9/8 | 10/7 |
| Laughing Gull | ** | Before July 1 | 7/15 | 8/13 | 11/12 | 12/5 |
| Osprey | *** | - | Before July 1 | 8/16 | 10/15 | 11/8 |
| Pectoral Sandpiper | ** | Before July 1 | 7/18 | 8/16 | 9/24 | 11/20 |
| Semipalmated Sandpiper | *** | 7/1 | 7/13 | 8/16 | 9/10 | 9/28 |
| Semipalmated Plover | *** | 7/1 | 7/25 | 8/17 | 9/8 | 10/4 |
| Forster's Tern | * | - | Before July 1 | 8/17 | 9/18 | 11/30 |
| Cedar Waxwing | *** | - | Before July 1 | 8/17 | 9/27 | 11/26 |
| Wood Duck | ** | Before July 1 | 7/6 | 8/18 | 10/31 | 11/21 |
| Lesser Yellowlegs | *** | - | Before July 1 | 8/18 | 9/10 | 9/25 |
| Least Sandpiper | *** | - | Before July 1 | 8/18 | 9/11 | 9/25 |
| Baltimore Oriole | *** | 7/29 | 8/7 | 8/19 | 9/6 | 9/18 |
| Black-bellied Plover | * | 7/20 | 8/1 | 8/20 | 9/3 | 12/1 |
| Greater Yellowlegs | ** | - | Before July 1 | 8/20 | 9/11 | 11/28 |
| Marbled Godwit | * | 7/22 | 8/2 | 8/20 | 9/5 | 9/21 |
| Caspian Tern | ** | Before July 1 | 7/17 | 8/20 | 9/14 | 10/20 |
| Stilt Sandpiper | * | Before July 1 | 7/15 | 8/21 | 9/11 | 9/25 |
| Prothonotary Warbler | * | 8/7 | 8/13 | 8/21 | 9/10 | 9/22 |
| Wilson's Phalarope | * | Before July 1 | 8/7 | 8/22 | 9/10 | 9/22 |
| Western Sandpiper | * | Before July 1 | 7/15 | 8/24 | 9/17 | 10/1 |
| Black Tern | ** | Before July 1 | 8/14 | 8/25 | 9/12 | 9/24 |
| Great Crested Flycatcher | *** | 8/12 | 8/17 | 8/25 | 9/14 | 9/26 |
| Blue-gray Gnatcatcher | *** | 8/4 | 8/14 | 8/25 | 9/15 | 9/29 |
| Worm-eating Warbler | * | 8/1 | 8/11 | 8/25 | 9/12 | 9/24 |
| Royal Tern | * | 7/12 | 7/31 | 8/25 | 11/10 | 11/25 |
| White-rumped Sandpiper | * | 7/22 | 8/6 | 8/26 | 9/13 | 9/28 |
| Red-necked Phalarope | * | 7/28 | 8/11 | 8/27 | 9/13 | 9/27 |
| Red Knot | * | - | Before July 1 | 8/28 | 9/15 | 9/28 |
| Ruby-throated Hummingbird | *** | 7/30 | 8/14 | 8/28 | 9/21 | 10/5 |
| Blue-winged Warbler | ** | 8/1 | 8/13 | 8/28 | 9/14 | 9/27 |
| Eastern Wood-Pewee | *** | 8/5 | 8/16 | 8/29 | 9/22 | 10/9 |
| Baird's Sandpiper | ** | 8/6 | 8/17 | 8/30 | 9/15 | 9/25 |
| Eastern Whip-poor-will | * | 8/16 | 8/21 | 8/30 | 9/19 | 10/2 |
| Olive-sided Flycatcher | * | 8/4 | 8/16 | 8/30 | 9/15 | 9/27 |
| Canada Warbler | ** | 8/5 | 8/16 | 8/30 | 9/15 | 9/26 |
| Common Nighthawk | *** | 8/7 | 8/17 | 8/31 | 9/14 | 9/25 |
| Kentucky Warbler | * | 8/15 | 8/21 | 8/31 | 9/17 | 9/29 |
| Bobolink | ** | 8/5 | 8/16 | 8/31 | 9/19 | 10/15 |
| Sanderling | ** | - | Before July 1 | 9/1 | 9/23 | 10/6 |
| Mourning Warbler | * | 8/4 | 8/15 | 9/1 | 9/21 | 10/7 |
| Buff-breasted Sandpiper | * | 8/10 | 8/20 | 9/3 | 9/17 | 9/28 |
| Least Flycatcher | ** | 8/7 | 8/18 | 9/3 | 9/22 | 10/5 |
| Warbling Vireo | *** | 8/13 | 8/21 | 9/3 | 9/19 | 9/30 |
Ending Departures
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Northern Rough-winged Swallow | ** | - | - | Before July 1 | 8/5 | 10/24 |
| Wilson's Storm-Petrel | * | - | Before July 1 | 7/21 | 8/6 | 9/22 |
| Orchard Oriole | *** | - | - | Before July 1 | 8/7 | 9/5 |
| Louisiana Waterthrush | * | - | - | Before July 1 | 8/9 | 8/31 |
| Least Bittern | * | - | Before July 1 | 7/17 | 8/12 | 9/3 |
| Least Tern | ** | - | Before July 1 | 7/23 | 8/15 | 9/7 |
| Glossy Ibis | * | - | Before July 1 | 7/23 | 8/17 | 9/26 |
| Piping Plover | * | - | Before July 1 | 7/25 | 8/17 | 9/10 |
| Yellow Warbler | *** | - | - | Before July 1 | 8/18 | 10/7 |
| Purple Martin | *** | - | Before July 1 | 7/26 | 8/19 | 9/8 |
| Gull-billed Tern | * | - | Before July 1 | 7/30 | 8/20 | 9/4 |
| Little Blue Heron | * | Before July 1 | 7/21 | 8/9 | 8/26 | 10/20 |
| Common Tern | *** | - | Before July 1 | 8/1 | 8/26 | 10/4 |
| Black-crowned Night-Heron | * | - | Before July 1 | 7/31 | 8/27 | 10/30 |
| Eastern Kingbird | *** | - | - | 8/2 | 8/27 | 9/12 |
| Bank Swallow | *** | - | Before July 1 | 8/1 | 8/28 | 9/15 |
| Clapper Rail | * | - | Before July 1 | 8/1 | 8/28 | 10/29 |
| Upland Sandpiper | * | 7/26 | 8/1 | 8/11 | 8/29 | 9/12 |
| Ruddy Turnstone | ** | Before July 1 | 7/25 | 8/12 | 8/29 | 9/17 |
| Cliff Swallow | ** | - | - | Before July 1 | 8/29 | 9/18 |
| Tree Swallow | *** | - | - | Before July 1 | 8/30 | 11/10 |
| Barn Swallow | *** | Before July 1 | 7/22 | 8/4 | 8/30 | 9/16 |
| American Oystercatcher | * | - | Before July 1 | 7/29 | 8/30 | 9/25 |
| Blue Grosbeak | * | Before July 1 | 7/18 | 8/5 | 8/31 | 10/17 |
| Roseate Tern | * | - | Before July 1 | 7/20 | 9/1 | 9/23 |
| Black-bellied Plover | * | 7/20 | 8/1 | 8/20 | 9/3 | 12/1 |
| Mississippi Kite | * | - | - | Before July 1 | 9/4 | 9/18 |
| Black-necked Stilt | * | - | Before July 1 | 7/28 | 9/4 | 9/19 |
Gulf Coast and Southeast
Marginal and unfavorable migration conditions will be widespread in the first half of the forecast period for the region, with scattered precipitation and southerly winds keeping migration amounts low. A change arrives by Wednesday night, with areas of the lower Mississippi River valley and the southern Appalachians experiencing more favorable weather for moderate to locally heavy flights for Wednesday and Thursday nights. Note, however, that such flights will not be widespread, as rain and southerly flow persists in many areas of Florida and the western Gulf Coast.
Great Crested Flycatcher, eBird S31232121, Lorri Howski/Macaulay Library.
Beginning Arrivals What is this?
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Prairie Warbler | ** | 7/23 | 9/8 | 9/23 | 10/13 | 10/30 |
| Ruby-throated Hummingbird | *** | 7/26 | 8/30 | 9/13 | 10/5 | 10/20 |
| Great Blue Heron | ** | 7/27 | 10/21 | 11/19 | - | - |
| Cooper's Hawk | ** | 7/29 | 9/11 | 10/24 | 11/11 | 11/22 |
| Yellow-throated Warbler | ** | 7/31 | 9/6 | 9/26 | 10/19 | 11/4 |
| Hooded Warbler | ** | 8/3 | 9/3 | 9/20 | 10/11 | 10/27 |
| Northern Parula | *** | 8/7 | 9/3 | 9/23 | 10/17 | 11/2 |
| Worm-eating Warbler | ** | 8/9 | 8/29 | 9/15 | 10/4 | 10/17 |
| Belted Kingfisher | *** | 8/12 | 9/14 | 10/26 | - | - |
| Pine Warbler | *** | 8/13 | 9/6 | 10/3 | - | - |
| Chuck-will's-widow | * | 8/15 | 8/31 | 9/17 | 10/6 | 10/20 |
| Least Flycatcher | ** | 8/15 | 8/30 | 9/14 | 10/1 | 10/13 |
| Yellow-bellied Flycatcher | * | 8/15 | 8/31 | 9/15 | 10/3 | 10/15 |
| Eastern Wood-Pewee | *** | 8/16 | 9/1 | 9/19 | 10/12 | 10/29 |
| Yellow-throated Vireo | *** | 8/16 | 8/30 | 9/15 | 10/3 | 10/17 |
| Black-billed Cuckoo | * | 8/17 | 9/5 | 9/26 | 10/18 | 11/1 |
| Baltimore Oriole | *** | 8/18 | 8/30 | 9/14 | 9/30 | 10/10 |
| Black-and-white Warbler | *** | 8/18 | 9/6 | 9/26 | 10/18 | 11/5 |
| Blue-winged Warbler | ** | 8/19 | 9/1 | 9/17 | 10/4 | 10/16 |
| Northern Waterthrush | *** | 8/19 | 9/3 | 9/19 | 10/7 | 10/21 |
| Summer Tanager | *** | 8/19 | 8/31 | 9/15 | 10/4 | 10/19 |
| White-eyed Vireo | *** | 8/19 | 9/3 | 9/20 | 10/11 | 10/30 |
| Acadian Flycatcher | ** | 8/20 | 9/1 | 9/16 | 10/5 | 10/18 |
| Bald Eagle | ** | 8/21 | 9/18 | After Dec 31 | - | - |
| Bobolink | ** | 8/21 | 9/4 | 9/21 | 10/9 | 10/23 |
| Red-eyed Vireo | *** | 8/22 | 9/5 | 9/19 | 10/8 | 10/23 |
| Warbling Vireo | * | 8/23 | 9/3 | 9/17 | 10/3 | 10/14 |
| Wilson's Warbler | *** | 8/23 | 9/4 | 9/19 | 10/4 | 10/14 |
| Blackburnian Warbler | *** | 8/24 | 9/6 | 9/22 | 10/9 | 10/23 |
| Red-headed Woodpecker | ** | 8/24 | 9/4 | 9/18 | 10/6 | 11/11 |
| Black Vulture | ** | 8/25 | 10/15 | After Dec 31 | - | - |
| Chestnut-sided Warbler | *** | 8/25 | 9/6 | 9/22 | 10/10 | 10/23 |
| Ovenbird | *** | 8/26 | 9/9 | 9/27 | 10/16 | 11/2 |
| Chimney Swift | *** | 8/27 | 9/7 | 9/20 | 10/11 | 10/25 |
| Golden-winged Warbler | * | 8/27 | 9/7 | 9/22 | 10/7 | 10/19 |
| Broad-winged Hawk | ** | 8/28 | 9/9 | 9/25 | 10/13 | 11/1 |
| Veery | *** | 8/28 | 9/7 | 9/21 | 10/5 | 10/16 |
| American Redstart | ****! | 8/29 | 9/11 | 9/28 | 10/16 | 10/30 |
| Sora | * | 8/29 | 9/10 | 12/18 | - | - |
| Nashville Warbler | *** | 8/30 | 9/13 | 10/4 | 10/26 | 11/15 |
| Cape May Warbler | ** | 8/31 | 9/12 | 9/29 | 10/16 | 10/31 |
| Scarlet Tanager | *** | 8/31 | 9/12 | 9/27 | 10/15 | 10/28 |
| Tennessee Warbler | *** | 8/31 | 9/15 | 10/3 | 10/22 | 11/5 |
| American Avocet | * | 9/1 | 10/20 | 11/5 | 11/24 | 12/8 |
| Blue-headed Vireo | * | 9/1 | 10/18 | 12/18 | After Dec 31 | - |
| Magnolia Warbler | *** | 9/1 | 9/14 | 10/1 | 10/19 | 11/1 |
| Clay-colored Sparrow | ** | 9/2 | 9/15 | 10/4 | 10/21 | 11/4 |
| Common Yellowthroat | *** | 9/2 | 9/16 | 10/5 | 10/23 | 11/6 |
| Sharp-shinned Hawk | ** | 9/2 | 9/17 | 10/28 | 11/12 | 11/22 |
| Brown Thrasher | *** | 9/3 | 9/18 | 10/5 | 10/24 | 11/7 |
| Merlin | *** | 9/3 | 9/17 | 10/11 | 11/1 | 11/18 |
| Swainson's Thrush | *** | 9/3 | 9/14 | 9/29 | 10/15 | 10/27 |
| Wood Thrush | ** | 9/3 | 9/16 | 10/2 | 10/19 | 10/31 |
Peaking Arrivals
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Western Sandpiper | ** | Before July 1 | 7/11 | 9/1 | 9/20 | 10/2 |
| Piping Plover | * | Before July 1 | 7/16 | 9/1 | - | - |
| Black-bellied Plover | * | 7/23 | 8/6 | 11/2 | - | - |
| Prothonotary Warbler | * | 8/2 | 8/11 | 8/28 | 9/23 | 10/9 |
| Caspian Tern | * | 7/26 | 8/13 | 10/26 | 11/23 | - |
| Cerulean Warbler | * | 8/1 | 8/13 | 8/28 | 9/14 | 9/26 |
| Buff-breasted Sandpiper | * | 7/31 | 8/14 | 8/30 | 9/17 | 9/30 |
| Kentucky Warbler | * | 8/4 | 8/15 | 9/2 | 9/24 | 10/9 |
| Yellow Warbler | *** | 7/29 | 8/16 | 9/7 | 9/29 | 10/15 |
| Alder Flycatcher | * | 8/4 | 8/17 | 9/3 | 9/20 | 10/4 |
| Bank Swallow | ** | 8/6 | 8/17 | 9/1 | 9/16 | 9/28 |
| Bell's Vireo | * | 8/8 | 8/18 | 8/29 | 9/23 | 10/10 |
| Common Nighthawk | * | 8/10 | 8/18 | 8/28 | 9/19 | 10/4 |
| Dickcissel | * | 8/10 | 8/19 | 9/2 | 9/24 | 10/16 |
| Olive-sided Flycatcher | * | 8/6 | 8/19 | 9/5 | 9/23 | 10/7 |
| Willow Flycatcher | * | 8/5 | 8/19 | 9/5 | 9/25 | 10/9 |
| Great Crested Flycatcher | *** | 8/11 | 8/20 | 9/1 | 9/20 | 10/5 |
| White-rumped Sandpiper | * | 8/8 | 8/20 | 9/5 | 9/22 | 10/5 |
| American Golden-Plover | * | 8/10 | 8/21 | 9/5 | 9/20 | 10/1 |
| Bullock's Oriole | * | 8/13 | 8/21 | 9/2 | 9/18 | 9/30 |
| Brown-crested Flycatcher | * | 8/16 | 8/23 | 9/1 | 9/20 | 10/2 |
| Yellow-breasted Chat | ** | 8/13 | 8/23 | 9/7 | 9/25 | 10/9 |
| Canada Warbler | ** | 8/13 | 8/24 | 9/9 | 9/26 | 10/9 |
| Blue-gray Gnatcatcher | *** | 8/4 | 8/25 | 9/13 | 10/1 | 10/14 |
| Blue-winged Teal | ** | 8/8 | 8/25 | 11/2 | - | - |
| Swainson's Warbler | * | 8/14 | 8/25 | 9/13 | 10/5 | 10/24 |
| Mourning Warbler | * | 8/15 | 8/27 | 9/12 | 9/28 | 10/10 |
| Worm-eating Warbler | * | 8/9 | 8/29 | 9/15 | 10/4 | 10/17 |
| Baltimore Oriole | *** | 8/18 | 8/30 | 9/14 | 9/30 | 10/10 |
| Least Flycatcher | ** | 8/15 | 8/30 | 9/14 | 10/1 | 10/13 |
| Ruby-throated Hummingbird | *** | 7/26 | 8/30 | 9/13 | 10/5 | 10/20 |
| Yellow-throated Vireo | ** | 8/16 | 8/30 | 9/15 | 10/3 | 10/17 |
| Chuck-will's-widow | * | 8/15 | 8/31 | 9/17 | 10/6 | 10/20 |
| Summer Tanager | *** | 8/19 | 8/31 | 9/15 | 10/4 | 10/19 |
| Yellow-bellied Flycatcher | * | 8/15 | 8/31 | 9/15 | 10/3 | 10/15 |
| Acadian Flycatcher | ** | 8/20 | 9/1 | 9/16 | 10/5 | 10/18 |
| Blue-winged Warbler | * | 8/19 | 9/1 | 9/17 | 10/4 | 10/16 |
| Eastern Wood-Pewee | *** | 8/16 | 9/1 | 9/19 | 10/12 | 10/29 |
| Hooded Warbler | ** | 8/3 | 9/3 | 9/20 | 10/11 | 10/27 |
| Northern Parula | *** | 8/7 | 9/3 | 9/23 | 10/17 | 11/2 |
| Northern Waterthrush | *** | 8/19 | 9/3 | 9/19 | 10/7 | 10/21 |
| Warbling Vireo | * | 8/23 | 9/3 | 9/17 | 10/3 | 10/14 |
| White-eyed Vireo | *** | 8/19 | 9/3 | 9/20 | 10/11 | 10/30 |
| Bobolink | * | 8/21 | 9/4 | 9/21 | 10/9 | 10/23 |
| Red-headed Woodpecker | ** | 8/24 | 9/4 | 9/18 | 10/6 | 11/11 |
| Wilson's Warbler | *** | 8/23 | 9/4 | 9/19 | 10/4 | 10/14 |
Beginning Departures
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Black-chinned Hummingbird | * | - | - | Before July 1 | 9/20 | 10/10 |
| Green Heron | ** | - | - | Before July 1 | 9/20 | 10/9 |
| Louisiana Waterthrush | * | - | - | Before July 1 | 9/11 | 9/29 |
| Yellow-crowned Night-Heron | * | - | - | Before July 1 | 9/24 | 10/21 |
| Eastern Kingbird | ** | - | - | 7/4 | 9/21 | 10/7 |
| Least Tern | ** | - | Before July 1 | 7/21 | 9/5 | 9/21 |
| Gull-billed Tern | * | - | Before July 1 | 7/23 | 9/7 | 9/29 |
| Black Skimmer | * | - | Before July 1 | 8/6 | 9/4 | 9/18 |
| Black-bellied Whistling-Duck | * | - | Before July 1 | 8/6 | 9/21 | 12/6 |
| Barn Swallow | *** | - | Before July 1 | 8/8 | 9/8 | 11/5 |
| Mississippi Kite | *** | - | - | 8/8 | 8/28 | 9/12 |
| Black-necked Stilt | ** | 7/14 | 7/27 | 8/11 | 9/16 | 11/28 |
| Cattle Egret | ** | - | - | 8/12 | 9/25 | - |
| Orchard Oriole | ** | - | - | 8/13 | 9/12 | 9/30 |
| Gray Kingbird | * | - | - | 8/14 | 9/16 | 10/11 |
| Stilt Sandpiper | * | 7/5 | 7/21 | 8/15 | 9/14 | 11/21 |
| Wilson's Plover | * | Before July 1 | 7/27 | 8/15 | 9/8 | 9/26 |
| Solitary Sandpiper | ** | - | Before July 1 | 8/17 | 9/13 | 10/5 |
| Spotted Sandpiper | ** | Before July 1 | 7/19 | 8/17 | 9/12 | 10/3 |
| Black-headed Grosbeak | * | - | - | 8/18 | 9/8 | 9/23 |
| Pectoral Sandpiper | ** | Before July 1 | 7/26 | 8/18 | 9/22 | 10/8 |
| Sandwich Tern | * | Before July 1 | 7/28 | 8/19 | 9/8 | 12/9 |
| Baird's Sandpiper | * | 7/8 | 7/28 | 8/20 | 9/24 | 10/9 |
| Upland Sandpiper | ** | 7/21 | 8/3 | 8/20 | 9/8 | 9/23 |
| Semipalmated Plover | ** | 7/14 | 7/30 | 8/21 | 9/10 | 10/2 |
| Common Tern | * | Before July 1 | 7/20 | 8/22 | 9/24 | 11/9 |
| Wilson's Phalarope | * | 7/19 | 8/2 | 8/22 | 9/12 | 10/3 |
| Semipalmated Sandpiper | ** | Before July 1 | 7/15 | 8/23 | 9/16 | 10/15 |
| Black Tern | *** | 7/20 | 8/8 | 8/24 | 9/13 | 9/27 |
| Least Sandpiper | ** | Before July 1 | 7/9 | 8/25 | 9/18 | - |
| Short-billed Dowitcher | * | Before July 1 | 7/3 | 8/27 | 9/14 | 9/25 |
| Cerulean Warbler | * | 8/1 | 8/13 | 8/28 | 9/14 | 9/26 |
| Common Nighthawk | ** | 8/10 | 8/18 | 8/28 | 9/19 | 10/4 |
| Prothonotary Warbler | * | 8/2 | 8/11 | 8/28 | 9/23 | 10/9 |
| Bell's Vireo | * | 8/8 | 8/18 | 8/29 | 9/23 | 10/10 |
| Buff-breasted Sandpiper | * | 7/31 | 8/14 | 8/30 | 9/17 | 9/30 |
| Bank Swallow | ** | 8/6 | 8/17 | 9/1 | 9/16 | 9/28 |
| Brown-crested Flycatcher | * | 8/16 | 8/23 | 9/1 | 9/20 | 10/2 |
| Cave Swallow | * | - | - | 9/1 | 9/26 | 11/26 |
| Great Crested Flycatcher | *** | 8/11 | 8/20 | 9/1 | 9/20 | 10/5 |
| Western Sandpiper | * | Before July 1 | 7/11 | 9/1 | 9/20 | 10/2 |
| Bullock's Oriole | * | 8/13 | 8/21 | 9/2 | 9/18 | 9/30 |
| Dickcissel | * | 8/10 | 8/19 | 9/2 | 9/24 | 10/16 |
| Kentucky Warbler | * | 8/4 | 8/15 | 9/2 | 9/24 | 10/9 |
| Alder Flycatcher | * | 8/4 | 8/17 | 9/3 | 9/20 | 10/4 |
Ending Departures
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Cliff Swallow | ** | - | - | Before July 1 | 7/8 | 10/7 |
| Purple Martin | *** | - | - | Before July 1 | 7/19 | 9/5 |
| Least Bittern | * | - | - | Before July 1 | 8/1 | 10/18 |
| Bachman's Sparrow | * | - | - | Before July 1 | 8/4 | 9/5 |
| Western Kingbird | ** | - | - | Before July 1 | 8/7 | 9/7 |
| Swallow-tailed Kite | ** | - | - | Before July 1 | 8/15 | 8/31 |
| Cassin's Sparrow | * | - | - | Before July 1 | 8/19 | 9/15 |
| Whimbrel | * | 7/8 | 7/24 | 8/9 | 8/24 | 9/4 |
| Blue Grosbeak | ** | - | - | Before July 1 | 8/26 | 11/1 |
| Mississippi Kite | *** | - | - | 8/8 | 8/28 | 9/12 |
| Black Skimmer | ** | - | Before July 1 | 8/6 | 9/4 | 9/18 |
Great Plains
Aside from the brief appearance of favorable and marginal migration conditions in the northern Plains on Monday and Tuesday nights, most of the region will experience unfavorable conditions including precipitation and southerly winds for the duration of the period. This brief window of movement will feature moderate flights. The remainder of the region will experience locally light to moderate flights for the period, particularly in areas with locally calm winds and no precipitation.
Red-eyed Vireo, eBird S31211132, Debbie Parker/Macaulay Library.
Species on the Move
Beginning Arrivals What is this?
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Ring-billed Gull | *** | 7/16 | 10/23 | 11/10 | 11/29 | - |
| American Golden-Plover | * | 8/6 | 9/3 | 9/27 | 10/23 | 11/19 |
| Wilson's Snipe | * | 8/7 | 10/3 | 10/18 | 11/4 | 11/16 |
| Cooper's Hawk | *** | 8/8 | 9/2 | 9/25 | 10/20 | 11/10 |
| Warbling Vireo | NA | 8/10 | 9/6 | 9/12 | 9/21 | 10/3 |
| Red-shouldered Hawk | * | 8/11 | 9/5 | 9/30 | 10/26 | - |
| Yellow-headed Blackbird | NA | 8/15 | 9/5 | 9/15 | 9/30 | 10/12 |
| Merlin | * | 8/16 | 9/6 | 10/26 | - | - |
| Black-throated Green Warbler | * | 8/17 | 9/1 | 9/19 | 10/7 | 10/22 |
| Gray Catbird | *** | 8/18 | 8/30 | 9/11 | 10/1 | 10/14 |
| Sora | * | 8/18 | 9/6 | 9/29 | 10/22 | 11/5 |
| Swainson's Thrush | *** | 8/18 | 8/30 | 9/13 | 9/29 | 10/10 |
| Blue-headed Vireo | *** | 8/19 | 9/1 | 9/18 | 10/5 | 10/18 |
| Brown Thrasher | *** | 8/19 | 8/30 | 9/11 | 9/30 | 10/12 |
| Western Tanager | * | 8/19 | 8/29 | 9/11 | 9/28 | 10/9 |
| White-eyed Vireo | * | 8/19 | 8/28 | 9/10 | 9/29 | 10/11 |
| Clay-colored Sparrow | *** | 8/20 | 9/3 | 9/24 | 10/16 | 10/31 |
| Turkey Vulture | *** | 8/20 | 9/8 | 9/22 | 10/16 | 10/30 |
| American White Pelican | ** | 8/22 | 9/9 | 10/16 | 11/18 | 12/9 |
| Pine Siskin | * | 8/23 | 10/11 | 12/28 | - | - |
| Nashville Warbler | *** | 8/24 | 9/6 | 9/23 | 10/10 | 10/24 |
| House Wren | ** | 8/25 | 9/1 | 9/10 | 10/3 | 10/19 |
| Osprey | *** | 8/25 | 9/7 | 9/24 | 10/11 | 11/12 |
| Eastern Phoebe | *** | 8/27 | 9/9 | 9/23 | 10/14 | 10/29 |
| Broad-winged Hawk | * | 8/28 | 9/7 | 9/20 | 10/7 | 10/19 |
| Summer Tanager | ** | 8/28 | 9/6 | 9/18 | 10/5 | 10/17 |
| Northern Flicker | ****! | 8/30 | 9/13 | 10/7 | 10/26 | 11/5 |
| Pied-billed Grebe | *** | 8/30 | 9/12 | 10/31 | 11/20 | 12/6 |
| Palm Warbler | ** | 8/31 | 9/11 | 9/27 | 10/13 | 10/25 |
| Purple Finch | * | 8/31 | 12/9 | After Dec 31 | - | - |
| Sharp-shinned Hawk | *** | 8/31 | 9/25 | 10/10 | - | - |
| Common Yellowthroat | NA | 9/1 | 9/15 | 9/25 | 10/9 | 10/14 |
| Franklin's Gull | *** | 9/1 | 9/16 | 10/13 | 11/10 | 11/25 |
| Indigo Bunting | ** | 9/1 | 9/15 | 10/1 | 10/10 | 10/21 |
| Western Grebe | * | 9/2 | 10/18 | 10/31 | 11/19 | 12/3 |
| Orange-crowned Warbler | ****! | 9/3 | 9/17 | 10/3 | 10/21 | 11/2 |
Peaking Arrivals
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Great Egret | *** | - | 7/15 | 9/11 | 10/16 | 11/10 |
| Peregrine Falcon | * | Before July 1 | 7/26 | 9/19 | 10/10 | 10/28 |
| Sanderling | * | 7/1 | 7/28 | 9/10 | 10/3 | 10/21 |
| Ruby-throated Hummingbird | *** | Before July 1 | 7/29 | 8/28 | 9/21 | 10/8 |
| Black-bellied Plover | * | 7/20 | 7/30 | 9/29 | 11/15 | 11/28 |
| Greater Yellowlegs | * | - | 8/1 | 10/26 | 11/13 | 11/25 |
| White-faced Ibis | * | Before July 1 | 8/14 | 9/4 | 10/1 | 10/27 |
| Blackburnian Warbler | * | 8/3 | 8/15 | 8/30 | 9/15 | 9/27 |
| Caspian Tern | * | 7/1 | 8/15 | 9/11 | 9/30 | 10/13 |
| Canada Warbler | * | 8/6 | 8/17 | 8/30 | 9/14 | 9/24 |
| Northern Waterthrush | ** | 8/7 | 8/17 | 8/31 | 9/15 | 9/25 |
| Yellow-bellied Flycatcher | * | 8/6 | 8/17 | 9/1 | 9/17 | 9/28 |
| Blue-winged Teal | *** | 8/2 | 8/18 | 9/18 | 10/25 | 11/13 |
| Least Flycatcher | *** | 8/8 | 8/19 | 9/3 | 9/20 | 10/3 |
| Olive-sided Flycatcher | *** | 8/9 | 8/19 | 9/2 | 9/18 | 9/29 |
| Red-eyed Vireo | *** | 8/11 | 8/19 | 8/31 | 9/19 | 10/2 |
| American Redstart | *** | 8/10 | 8/20 | 9/3 | 9/20 | 10/2 |
| Black-and-white Warbler | *** | 8/10 | 8/20 | 9/4 | 9/20 | 10/3 |
| Mourning Warbler | * | 8/10 | 8/20 | 9/3 | 9/18 | 9/29 |
| Ovenbird | ** | 8/10 | 8/20 | 9/4 | 9/20 | 10/2 |
| Yellow-throated Vireo | * | 8/11 | 8/20 | 9/2 | 9/20 | 10/2 |
| Chestnut-sided Warbler | * | 8/11 | 8/21 | 9/5 | 9/20 | 10/2 |
| Swainson's Hawk | ** | 7/28 | 8/21 | 9/7 | 10/4 | 10/21 |
| Rose-breasted Grosbeak | * | 8/12 | 8/22 | 9/4 | 9/25 | 10/10 |
| Tennessee Warbler | ** | 8/7 | 8/22 | 9/10 | 9/30 | 10/16 |
| Magnolia Warbler | * | 8/13 | 8/24 | 9/9 | 9/25 | 10/7 |
| Red-necked Phalarope | * | 7/1 | 8/25 | 9/9 | 9/30 | 10/14 |
| Say's Phoebe | * | 8/12 | 8/25 | 9/7 | 9/28 | 10/11 |
| Yellow-breasted Chat | * | 8/20 | 8/26 | 9/4 | 9/24 | 10/8 |
| Blackpoll Warbler | * | 8/15 | 8/27 | 9/11 | 9/27 | 10/8 |
| Northern Parula | ** | 8/17 | 8/27 | 9/11 | 9/29 | 10/11 |
| Philadelphia Vireo | * | 8/15 | 8/27 | 9/12 | 9/29 | 10/10 |
| White-eyed Vireo | * | 8/19 | 8/28 | 9/10 | 9/29 | 10/11 |
| Western Tanager | * | 8/19 | 8/29 | 9/11 | 9/28 | 10/9 |
| Brown Thrasher | *** | 8/19 | 8/30 | 9/11 | 9/30 | 10/12 |
| Gray Catbird | *** | 8/18 | 8/30 | 9/11 | 10/1 | 10/14 |
| Swainson's Thrush | *** | 8/18 | 8/30 | 9/13 | 9/29 | 10/10 |
| Black-throated Green Warbler | * | 8/17 | 9/1 | 9/19 | 10/7 | 10/22 |
| Blue-headed Vireo | *** | 8/19 | 9/1 | 9/18 | 10/5 | 10/18 |
| House Wren | ** | 8/25 | 9/1 | 9/10 | 10/3 | 10/19 |
| Cooper's Hawk | ** | 8/8 | 9/2 | 9/25 | 10/20 | 11/10 |
| American Golden-Plover | * | 8/6 | 9/3 | 9/27 | 10/23 | 11/19 |
| Clay-colored Sparrow | *** | 8/20 | 9/3 | 9/24 | 10/16 | 10/31 |
Beginning Departures
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Cliff Swallow | *** | - | - | Before July 1 | 9/2 | 9/25 |
| Lark Sparrow | *** | - | - | Before July 1 | 9/10 | 9/28 |
| Marbled Godwit | * | - | - | Before July 1 | 9/8 | 10/2 |
| Prothonotary Warbler | * | - | - | Before July 1 | 8/30 | 9/24 |
| Snowy Plover | * | - | - | Before July 1 | 9/12 | 10/3 |
| Tree Swallow | ** | - | - | Before July 1 | 9/4 | 11/8 |
| Willet | * | - | - | Before July 1 | 9/8 | 10/5 |
| Western Wood-Pewee | * | - | Before July 1 | 7/20 | 9/17 | 9/29 |
| Killdeer | *** | Before July 1 | 7/4 | 8/2 | 11/3 | 11/28 |
| Cattle Egret | * | - | - | 8/5 | 9/30 | 11/3 |
| Black-necked Stilt | * | - | - | 8/7 | 9/17 | 10/4 |
| Eastern Kingbird | *** | Before July 1 | 7/25 | 8/7 | 9/6 | 9/22 |
| Short-billed Dowitcher | * | Before July 1 | 7/6 | 8/7 | 9/2 | 10/4 |
| Spotted Sandpiper | *** | Before July 1 | 7/6 | 8/7 | 9/12 | 10/1 |
| Chimney Swift | *** | - | 7/25 | 8/10 | 10/10 | 10/25 |
| Green Heron | ** | Before July 1 | 7/2 | 8/11 | 9/18 | 10/10 |
| Bank Swallow | ** | Before July 1 | 7/5 | 8/12 | 9/13 | 9/29 |
| Baird's Sandpiper | ** | ]+D11 | 7/10 | 8/13 | 9/11 | 10/3 |
| Semipalmated Sandpiper | ** | 7/1 | 7/15 | 8/15 | 9/14 | 10/3 |
| Solitary Sandpiper | *** | Before July 1 | 7/6 | 8/16 | 9/12 | 9/28 |
| Black Tern | *** | Before July 1 | 7/5 | 8/17 | 9/14 | 10/2 |
| Lark Bunting | ** | - | - | 8/17 | 9/13 | 9/30 |
| Mississippi Kite | *** | Before July 1 | 8/1 | 8/18 | 9/10 | 9/23 |
| Snowy Egret | ** | Before July 1 | 7/5 | 8/18 | 10/2 | 10/24 |
| Semipalmated Plover | * | 7/1 | 7/21 | 8/19 | 9/17 | 10/11 |
| Wood Duck | ** | Before July 1 | 7/1 | 8/19 | 10/27 | 11/19 |
| Bell's Vireo | *** | 8/5 | 8/11 | 8/20 | 9/11 | 9/24 |
| Forster's Tern | ** | Before July 1 | 7/26 | 8/20 | 9/15 | 10/26 |
| Buff-breasted Sandpiper | * | 7/23 | 8/3 | 8/21 | 9/12 | 9/29 |
| Lesser Yellowlegs | ** | - | Before July 1 | 8/21 | 9/18 | 11/15 |
| Wilson's Phalarope | ** | - | Before July 1 | 8/21 | 9/15 | 10/2 |
| Eastern Wood-Pewee | *** | Before July 1 | 8/5 | 8/22 | 9/19 | 10/6 |
| Alder Flycatcher | * | 7/26 | 8/7 | 8/23 | 9/9 | 9/21 |
| Little Blue Heron | ** | - | 7/10 | 8/24 | 9/16 | 10/2 |
| Great Crested Flycatcher | *** | 8/11 | 8/17 | 8/25 | 9/15 | 9/27 |
| Baltimore Oriole | *** | 8/6 | 8/14 | 8/26 | 9/12 | 9/23 |
| Least Sandpiper | *** | - | 7/10 | 8/26 | 9/16 | 9/30 |
| Stilt Sandpiper | ** | Before July 1 | 7/8 | 8/26 | 9/15 | 9/30 |
| Yellow Warbler | *** | 8/1 | 8/12 | 8/26 | 9/17 | 10/1 |
| Blue-gray Gnatcatcher | *** | 8/2 | 8/15 | 8/27 | 9/21 | 10/5 |
| Red-headed Woodpecker | *** | 7/31 | 8/13 | 8/27 | 9/23 | 10/13 |
| Common Nighthawk | *** | - | - | 8/28 | 9/22 | 10/8 |
| Ruby-throated Hummingbird | *** | Before July 1 | 7/29 | 8/28 | 9/21 | 10/8 |
| Blackburnian Warbler | * | 8/3 | 8/15 | 8/30 | 9/15 | 9/27 |
| Canada Warbler | * | 8/6 | 8/17 | 8/30 | 9/14 | 9/24 |
| Northern Waterthrush | ** | 8/7 | 8/17 | 8/31 | 9/15 | 9/25 |
| Red-eyed Vireo | *** | 8/11 | 8/19 | 8/31 | 9/19 | 10/2 |
| Chipping Sparrow | *** | - | - | 9/1 | 10/31 | 11/14 |
| Common Tern | * | - | - | 9/1 | 10/7 | 11/1 |
| Mourning Dove | *** | - | - | 9/1 | 10/6 | 10/26 |
| Yellow-bellied Flycatcher | * | 8/6 | 8/17 | 9/1 | 9/17 | 9/28 |
| Olive-sided Flycatcher | *** | 8/9 | 8/19 | 9/2 | 9/18 | 9/29 |
| Yellow-throated Vireo | ** | 8/11 | 8/20 | 9/2 | 9/20 | 10/2 |
| American Redstart | *** | 8/10 | 8/20 | 9/3 | 9/20 | 10/2 |
| Least Flycatcher | *** | 8/8 | 8/19 | 9/3 | 9/20 | 10/3 |
| Mourning Warbler | * | 8/10 | 8/20 | 9/3 | 9/18 | 9/29 |
| Black-and-white Warbler | *** | 8/10 | 8/20 | 9/4 | 9/20 | 10/3 |
| Ovenbird | ** | 8/10 | 8/20 | 9/4 | 9/20 | 10/2 |
| Rose-breasted Grosbeak | ** | 8/12 | 8/22 | 9/4 | 9/25 | 10/10 |
| White-faced Ibis | * | Before July 1 | 8/14 | 9/4 | 10/1 | 10/27 |
| Yellow-breasted Chat | * | 8/20 | 8/26 | 9/4 | 9/24 | 10/8 |
Ending Departures
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Dickcissel | *** | - | - | Before July 1 | 7/3 | 9/10 |
| Northern Rough-winged Swallow | ** | - | - | Before July 1 | 7/15 | 10/19 |
| Louisiana Waterthrush | * | - | - | Before July 1 | 7/25 | 9/1 |
| Orchard Oriole | *** | - | - | Before July 1 | 7/29 | 9/9 |
| Western Kingbird | *** | - | Before July 1 | 7/17 | 8/11 | 9/16 |
| Piping Plover | * | - | - | 7/26 | 8/12 | 9/24 |
| Least Tern | * | - | - | 7/26 | 8/20 | 9/13 |
| Purple Martin | *** | - | 7/2 | 7/23 | 8/20 | 9/9 |
| Yellow-billed Cuckoo | *** | - | - | Before July 1 | 8/22 | 10/4 |
| Least Bittern | * | - | - | Before July 1 | 8/25 | 9/30 |
| Pectoral Sandpiper | ** | Before July 1 | 7/20 | 8/10 | 8/26 | 10/20 |
| Yellow-crowned Night-Heron | * | - | Before July 1 | 7/31 | 8/26 | 10/5 |
| Blue Grosbeak | *** | 7/27 | 8/1 | 8/9 | 8/27 | 9/11 |
| Upland Sandpiper | *** | 7/23 | 7/29 | 8/6 | 8/27 | 9/10 |
| Prothonotary Warbler | * | - | - | Before July 1 | 8/30 | 9/24 |
| Cliff Swallow | *** | - | - | Before July 1 | 9/2 | 9/25 |
| Short-billed Dowitcher | * | Before July 1 | 7/6 | 8/7 | 9/2 | 10/4 |
| Tree Swallow | ** | - | - | Before July 1 | 9/4 | 11/8 |
West
Friday and Sunday nights show the greatest potential for moderate flights, as locally favorable conditions for migration reach their greatest extents on these nights. Yet, even on these nights, most of the activity will occur in skies in the northern half of the region. The remainder of period will see isolated patches of migration, mostly light at that, in areas where winds are calm and precipitation is not falling.
Western Sandpiper, eBird S31221745, Albert Minkowski/Macaulay Library.
Species on the Move
Beginning Arrivals What is this?
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Ring-billed Gull | ** | Before July 1 | 11/2 | 11/22 | 12/5 | - |
| Sooty Shearwater | * | Before July 1 | 8/28 | 9/12 | 10/2 | 10/16 |
| Long-tailed Jaeger | * | 7/19 | 8/29 | 9/12 | 10/1 | 10/13 |
| Pomarine Jaeger | * | 7/20 | 8/30 | 9/25 | 10/22 | 11/14 |
| South Polar Skua | * | 7/26 | 9/10 | 9/25 | 10/15 | 10/30 |
| Pied-billed Grebe | ** | 7/27 | 10/18 | 11/11 | 11/29 | - |
| Cooper's Hawk | * | 8/1 | 9/7 | 10/1 | 11/2 | 11/19 |
| Northern Harrier | ** | 8/12 | 10/29 | 11/20 | - | - |
| Orange-crowned Warbler | *** | 8/12 | 9/2 | 9/22 | 10/12 | 10/29 |
| Townsend's Warbler | *** | 8/12 | 8/30 | 9/30 | 10/27 | 11/10 |
| Savannah Sparrow | *** | 8/13 | 8/29 | 9/27 | 10/21 | 11/9 |
| Clay-colored Sparrow | * | 8/14 | 8/28 | 9/17 | 10/6 | 11/2 |
| Belted Kingfisher | *** | 8/15 | 9/5 | 10/27 | 11/10 | - |
| Sabine's Gull | * | 8/15 | 9/4 | 9/21 | 10/6 | 10/17 |
| Common Yellowthroat | *** | 8/17 | 8/29 | 9/16 | 10/9 | 10/28 |
| Pectoral Sandpiper | ** | 8/17 | 9/1 | 9/20 | 10/11 | 10/28 |
| Vesper Sparrow | ** | 8/17 | 8/30 | 9/15 | 10/3 | 10/17 |
| Red-tailed Hawk | *** | 8/18 | 9/12 | After Dec 31 | - | - |
| Marsh Wren | ** | 8/19 | 9/27 | 10/30 | 11/21 | - |
| Red-shouldered Hawk | ** | 8/19 | 9/6 | 10/3 | 10/23 | - |
| Common Tern | * | 8/19 | 9/1 | 9/16 | 10/3 | 10/16 |
| Pacific-slope Flycatcher | ** | 8/19 | 8/28 | 9/12 | 10/4 | 10/20 |
| Black Phoebe | *** | 8/20 | 9/6 | 10/30 | - | - |
| Green-tailed Towhee | ** | 8/21 | 9/1 | 9/14 | 10/1 | 10/12 |
| Parasitic Jaeger | * | 8/21 | 9/4 | 9/20 | 10/8 | 10/22 |
| Prairie Warbler | * | 8/21 | 9/3 | 9/19 | 10/5 | 10/17 |
| Tennessee Warbler | * | 8/22 | 9/4 | 9/21 | 10/8 | 10/22 |
| Sharp-shinned Hawk | ** | 8/23 | 9/9 | 10/22 | 11/8 | - |
| Brewer's Blackbird | *** | 8/23 | 9/8 | 9/28 | 10/16 | 11/10 |
| Turkey Vulture | *** | 8/23 | 9/3 | 9/14 | 10/6 | 10/19 |
| Red-winged Blackbird | *** | 8/24 | 9/11 | 10/10 | 10/31 | 11/21 |
| Blackburnian Warbler | * | 8/25 | 9/8 | 9/28 | 10/17 | 11/7 |
| Red-throated Loon | * | 8/25 | 9/5 | 9/20 | 9/28 | 10/2 |
| Bobolink | * | 8/25 | 9/6 | 9/22 | 10/8 | 10/21 |
| Red-necked Grebe | * | 8/26 | 10/20 | 11/6 | 11/22 | - |
| Chestnut-sided Warbler | * | 8/26 | 9/7 | 9/24 | 10/9 | 10/24 |
| Vaux's Swift | * | 8/26 | 9/5 | 9/16 | 10/7 | 10/21 |
| Blackpoll Warbler | * | 8/28 | 9/8 | 9/24 | 10/9 | 10/22 |
| Prothonotary Warbler | * | 8/28 | 9/18 | 10/4 | 10/21 | 11/1 |
| Merlin | * | 8/29 | 9/13 | 12/22 | - | - |
| American Pipit | *** | 8/30 | 9/14 | 11/7 | - | - |
| Eared Grebe | *** | 8/30 | 9/29 | 11/9 | 11/29 | 12/11 |
| Lincoln's Sparrow | *** | 8/30 | 9/13 | 10/5 | 10/22 | 11/8 |
| Say's Phoebe | *** | 8/30 | 9/13 | 10/1 | - | - |
| Flesh-footed Shearwater | * | 8/31 | 9/16 | 10/2 | 10/21 | 11/4 |
| Broad-winged Hawk | * | 9/2 | 9/12 | 9/27 | 10/13 | 10/24 |
| Yellow-rumped Warbler | *** | 9/2 | 9/26 | 10/17 | 10/29 | 11/8 |
| American Wigeon | *** | 9/3 | 10/19 | 11/20 | 12/4 | 12/16 |
| White-crowned Sparrow | ****! | 9/4 | 9/20 | 10/14 | 10/26 | 11/6 |
Peaking Arrivals
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| American Avocet | * | - | Before July 1 | 8/31 | 9/28 | 10/20 |
| Heermann's Gull | * | - | Before July 1 | 9/16 | 10/7 | 12/1 |
| Marbled Godwit | * | - | Before July 1 | 9/2 | - | - |
| Franklin's Gull | * | Before July 1 | Before July 1 | 9/3 | 10/3 | 11/1 |
| Green Heron | * | - | Before July 1 | 8/30 | 9/23 | 10/18 |
| Short-billed Dowitcher | * | Before July 1 | 7/4 | 8/28 | 9/13 | 9/24 |
| Western Sandpiper | *** | Before July 1 | 7/8 | 8/29 | 9/15 | 10/6 |
| Greater Yellowlegs | *** | Before July 1 | 7/10 | 8/30 | 9/14 | 12/11 |
| California Gull | * | Before July 1 | 7/14 | 11/9 | 11/26 | 12/10 |
| Least Sandpiper | *** | Before July 1 | 7/15 | 8/28 | 9/13 | 9/25 |
| Stilt Sandpiper | * | Before July 1 | 7/17 | 8/31 | 9/15 | 9/27 |
| Surfbird | * | Before July 1 | 7/17 | 9/1 | - | - |
| Sanderling | * | Before July 1 | 7/18 | 9/11 | - | - |
| Black Turnstone | * | 7/3 | 7/19 | 9/14 | 11/26 | 12/7 |
| Black-footed Albatross | * | Before July 1 | 7/21 | 9/12 | 10/11 | 11/5 |
| Elegant Tern | * | Before July 1 | 7/21 | 9/15 | 10/5 | 11/26 |
| Black-bellied Plover | * | Before July 1 | 7/23 | 10/8 | - | - |
| Arctic Tern | * | 7/18 | 8/8 | 9/5 | 9/30 | 10/17 |
| Red-breasted Nuthatch | ** | 7/29 | 8/10 | 9/2 | 10/28 | 11/14 |
| Baird's Sandpiper | ** | 7/30 | 8/13 | 8/29 | 9/15 | 9/29 |
| Black-throated Gray Warbler | * | 7/30 | 8/13 | 9/30 | 10/22 | 11/4 |
| Pink-footed Shearwater | * | Before July 1 | 8/15 | 9/15 | 10/19 | 11/12 |
| Cinnamon Teal | * | 7/31 | 8/16 | 9/5 | 9/28 | 10/14 |
| Nashville Warbler | ** | 8/2 | 8/16 | 9/4 | 9/23 | 10/12 |
| Red-necked Phalarope | *** | 8/2 | 8/16 | 9/1 | 9/19 | 10/5 |
| American White Pelican | * | Before July 1 | 8/17 | 9/1 | 9/26 | 12/11 |
| Ashy Storm-Petrel | * | Before July 1 | 8/18 | 9/11 | 10/8 | 10/26 |
| Red-headed Woodpecker | * | 8/8 | 8/18 | 8/31 | 9/15 | 9/26 |
| Buff-breasted Sandpiper | * | 8/9 | 8/19 | 9/2 | 9/16 | 9/26 |
| Gray Catbird | * | 8/10 | 8/19 | 8/31 | 9/19 | 10/2 |
| Killdeer | *** | 8/4 | 8/19 | 9/8 | 9/30 | 11/20 |
| MacGillivray's Warbler | *** | 8/8 | 8/19 | 9/4 | 9/23 | 10/7 |
| Red-eyed Vireo | * | 8/11 | 8/19 | 8/30 | 9/17 | 9/29 |
| Yellow Warbler | *** | 8/5 | 8/19 | 9/8 | 10/3 | 10/21 |
| Chipping Sparrow | * | 8/7 | 8/20 | 9/8 | 10/11 | 11/5 |
| Green-winged Teal | ** | 8/7 | 8/20 | 11/21 | - | - |
| Northern Shoveler | *** | 8/5 | 8/20 | 11/22 | - | - |
| Northern Waterthrush | * | 8/9 | 8/20 | 9/4 | 9/19 | 10/3 |
| Willow Flycatcher | ** | 8/9 | 8/20 | 9/3 | 9/23 | 10/7 |
| Black Storm-Petrel | * | Before July 1 | 8/21 | 9/6 | 10/21 | 11/1 |
| Blue-winged Teal | * | 8/6 | 8/21 | 9/28 | 10/24 | 11/8 |
| Brewer's Sparrow | * | 8/6 | 8/21 | 9/8 | 9/28 | 10/11 |
| Brown Thrasher | * | 8/12 | 8/21 | 9/5 | 9/21 | 10/6 |
| Buller's Shearwater | * | 7/28 | 8/21 | 9/21 | 10/22 | 11/15 |
| Least Flycatcher | * | 8/11 | 8/21 | 9/6 | 9/24 | 10/8 |
| Yellow-headed Blackbird | * | 8/12 | 8/21 | 9/2 | 9/24 | 10/11 |
| Cassin's Vireo | * | 8/11 | 8/22 | 9/6 | 9/25 | 10/8 |
| Gray Flycatcher | * | 8/9 | 8/22 | 9/5 | 9/25 | 10/7 |
| Hammond's Flycatcher | * | 8/13 | 8/22 | 9/6 | 9/24 | 10/7 |
| Northern Pintail | ** | 8/9 | 8/22 | 11/19 | - | - |
| Wilson's Warbler | *** | 8/8 | 8/22 | 9/8 | 9/28 | 10/12 |
| American Redstart | * | 8/11 | 8/23 | 9/10 | 9/27 | 10/11 |
| Sora | * | 8/3 | 8/23 | 9/22 | - | - |
| Blue-gray Gnatcatcher | * | 8/9 | 8/24 | 9/12 | 9/30 | 10/13 |
| House Wren | ** | 8/14 | 8/24 | 9/9 | 9/29 | 11/8 |
| Warbling Vireo | *** | 8/14 | 8/25 | 9/9 | 9/29 | 10/13 |
| Western Tanager | *** | 8/15 | 8/25 | 9/7 | 9/28 | 10/12 |
| Ruff | * | 7/27 | 8/26 | 9/10 | 9/27 | 10/9 |
| Swainson's Thrush | ** | 8/19 | 8/26 | 9/8 | 9/24 | 10/10 |
| Black-and-white Warbler | * | 8/10 | 8/27 | 10/5 | 10/31 | 11/17 |
| Clay-colored Sparrow | * | 8/14 | 8/28 | 9/17 | 10/6 | 11/2 |
| Pacific-slope Flycatcher | ** | 8/19 | 8/28 | 9/12 | 10/4 | 10/20 |
| Sooty Shearwater | * | Before July 1 | 8/28 | 9/12 | 10/2 | 10/16 |
| Common Yellowthroat | *** | 8/17 | 8/29 | 9/16 | 10/9 | 10/28 |
| Long-tailed Jaeger | * | 7/19 | 8/29 | 9/12 | 10/1 | 10/13 |
| Savannah Sparrow | *** | 8/13 | 8/29 | 9/27 | 10/21 | 11/9 |
| Pomarine Jaeger | * | 7/20 | 8/30 | 9/25 | 10/22 | 11/14 |
| Townsend's Warbler | *** | 8/12 | 8/30 | 9/30 | 10/27 | 11/10 |
| Vesper Sparrow | ** | 8/17 | 8/30 | 9/15 | 10/3 | 10/17 |
| Common Tern | * | 8/19 | 9/1 | 9/16 | 10/3 | 10/16 |
| Green-tailed Towhee | * | 8/21 | 9/1 | 9/14 | 10/1 | 10/12 |
| Pectoral Sandpiper | ** | 8/17 | 9/1 | 9/20 | 10/11 | 10/28 |
| Orange-crowned Warbler | *** | 8/12 | 9/2 | 9/22 | 10/12 | 10/29 |
| Prairie Warbler | * | 8/21 | 9/3 | 9/19 | 10/5 | 10/17 |
| Turkey Vulture | *** | 8/23 | 9/3 | 9/14 | 10/6 | 10/19 |
| Parasitic Jaeger | * | 8/21 | 9/4 | 9/20 | 10/8 | 10/22 |
| Sabine's Gull | * | 8/15 | 9/4 | 9/21 | 10/6 | 10/17 |
| Tennessee Warbler | * | 8/22 | 9/4 | 9/21 | 10/8 | 10/22 |
Beginning Departures
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Black-headed Grosbeak | *** | - | - | Before July 1 | 9/2 | 9/30 |
| Northern Rough-winged Swallow | ** | - | - | Before July 1 | 9/10 | 9/27 |
| Olive-sided Flycatcher | * | - | - | Before July 1 | 9/19 | 10/3 |
| Western Kingbird | *** | - | - | 7/13 | 9/10 | 9/26 |
| Plumbeous Vireo | * | - | - | 7/15 | 9/22 | 10/6 |
| Calliope Hummingbird | * | - | Before July 1 | 7/27 | 9/3 | 9/23 |
| Summer Tanager | * | - | - | 7/27 | 10/3 | 10/15 |
| Bell's Vireo | * | - | Before July 1 | 7/28 | 9/26 | 10/12 |
| Broad-tailed Hummingbird | ** | - | Before July 1 | 7/28 | 9/3 | 9/26 |
| Yellow-billed Cuckoo | * | - | Before July 1 | 7/28 | 8/28 | 9/19 |
| Blue Grosbeak | ** | Before July 1 | 7/1 | 7/31 | 9/16 | 10/12 |
| Caspian Tern | ** | - | Before July 1 | 7/31 | 9/6 | 9/24 |
| Rufous Hummingbird | *** | Before July 1 | 7/1 | 8/1 | 9/8 | 9/25 |
| Purple Martin | * | - | Before July 1 | 8/3 | 9/7 | 9/22 |
| Common Nighthawk | ** | - | - | 8/4 | 9/1 | 9/22 |
| Grace's Warbler | * | Before July 1 | 7/22 | 8/4 | 9/2 | 9/20 |
| Mississippi Kite | * | - | Before July 1 | 8/4 | 9/6 | 10/1 |
| Whimbrel | * | Before July 1 | 7/10 | 8/5 | 10/3 | - |
| Western Wood-Pewee | *** | - | - | 8/7 | 9/26 | 10/12 |
| Black-chinned Hummingbird | *** | Before July 1 | 7/16 | 8/9 | 9/13 | 10/4 |
| Zone-tailed Hawk | * | Before July 1 | 7/17 | 8/9 | 9/23 | 10/11 |
| Snowy Plover | * | Before July 1 | 7/4 | 8/10 | 9/9 | 10/4 |
| Eastern Kingbird | ** | 7/24 | 8/1 | 8/11 | 9/2 | 9/16 |
| Wilson's Phalarope | ** | Before July 1 | 7/13 | 8/11 | 9/11 | 10/3 |
| Swainson's Hawk | ** | - | 7/26 | 8/14 | 9/27 | 10/13 |
| Upland Sandpiper | * | 7/26 | 8/2 | 8/14 | 8/29 | 9/10 |
| Black Tern | * | Before July 1 | 7/24 | 8/15 | 9/24 | 10/8 |
| Mourning Dove | *** | - | Before July 1 | 8/17 | 9/22 | 10/8 |
| Bank Swallow | * | - | Before July 1 | 8/18 | 9/12 | 9/28 |
| Lark Sparrow | ** | 7/21 | 8/1 | 8/19 | 9/19 | 10/5 |
| Semipalmated Sandpiper | * | Before July 1 | 7/31 | 8/19 | 9/9 | 9/22 |
| Lazuli Bunting | ** | 8/5 | 8/11 | 8/20 | 9/17 | 10/10 |
| Lark Bunting | * | 7/25 | 8/4 | 8/21 | 9/9 | 9/26 |
| Ruddy Turnstone | * | Before July 1 | 7/13 | 8/21 | 9/8 | 12/5 |
| Spotted Sandpiper | *** | Before July 1 | 7/3 | 8/21 | 9/19 | 10/4 |
| Black-necked Stilt | ** | Before July 1 | 7/1 | 8/22 | 9/18 | 10/7 |
| Hermit Warbler | * | 7/28 | 8/6 | 8/22 | 9/7 | 10/26 |
| Barn Swallow | *** | - | Before July 1 | 8/23 | 9/25 | 10/12 |
| Fork-tailed Storm-Petrel | * | 7/16 | 7/30 | 8/23 | 10/7 | 10/23 |
| Wandering Tattler | * | Before July 1 | 7/20 | 8/24 | 9/24 | 10/16 |
| Lesser Yellowlegs | ** | Before July 1 | 8/9 | 8/26 | 9/14 | 10/20 |
| Osprey | ** | 8/4 | 8/14 | 8/26 | 9/16 | 10/18 |
| Semipalmated Plover | ** | Before July 1 | 7/13 | 8/26 | 9/14 | 9/28 |
| Solitary Sandpiper | ** | 7/25 | 8/11 | 8/26 | 9/14 | 9/27 |
| White-faced Ibis | ** | Before July 1 | 7/4 | 8/26 | 9/25 | 10/16 |
| Virginia's Warbler | * | 8/3 | 8/14 | 8/27 | 9/17 | 10/2 |
| Least Sandpiper | *** | Before July 1 | 7/15 | 8/28 | 9/13 | 9/25 |
| Short-billed Dowitcher | * | Before July 1 | 7/4 | 8/28 | 9/13 | 9/24 |
| Baird's Sandpiper | ** | 7/30 | 8/13 | 8/29 | 9/15 | 9/29 |
| Sage Thrasher | * | - | - | 8/29 | 9/24 | 10/20 |
| Western Sandpiper | *** | Before July 1 | 7/8 | 8/29 | 9/15 | 10/6 |
| Greater Yellowlegs | ** | Before July 1 | 7/10 | 8/30 | 9/14 | 12/11 |
| Green Heron | * | - | Before July 1 | 8/30 | 9/23 | 10/18 |
| Red-eyed Vireo | * | 8/11 | 8/19 | 8/30 | 9/17 | 9/29 |
| American Avocet | * | - | Before July 1 | 8/31 | 9/28 | 10/20 |
| Gray Catbird | ** | 8/10 | 8/19 | 8/31 | 9/19 | 10/2 |
| Red-headed Woodpecker | * | 8/8 | 8/18 | 8/31 | 9/15 | 9/26 |
| Stilt Sandpiper | * | Before July 1 | 7/17 | 8/31 | 9/15 | 9/27 |
| Tufted Puffin | * | - | - | 8/31 | 9/24 | 10/11 |
| American White Pelican | * | Before July 1 | 8/17 | 9/1 | 9/26 | 12/11 |
| Red-necked Phalarope | *** | 8/2 | 8/16 | 9/1 | 9/19 | 10/5 |
| Buff-breasted Sandpiper | * | 8/9 | 8/19 | 9/2 | 9/16 | 9/26 |
| Red-breasted Nuthatch | * | 7/29 | 8/10 | 9/2 | 10/28 | 11/14 |
| Yellow-headed Blackbird | ** | 8/12 | 8/21 | 9/2 | 9/24 | 10/11 |
| Franklin's Gull | * | Before July 1 | 7/1 | 9/3 | 10/3 | 11/1 |
| Willow Flycatcher | *** | 8/9 | 8/20 | 9/3 | 9/23 | 10/7 |
| MacGillivray's Warbler | *** | 8/8 | 8/19 | 9/4 | 9/23 | 10/7 |
| Nashville Warbler | ** | 8/2 | 8/16 | 9/4 | 9/23 | 10/12 |
| Northern Waterthrush | * | 8/9 | 8/20 | 9/4 | 9/19 | 10/3 |
Ending Departures
| Species | Noticeability | Migrants Begin Arriving | Rapid Migrant Influx | Peak | Rapid Migrant Departure | Last Migrants Depart |
|---|---|---|---|---|---|---|
| Black Swift | * | - | - | Before July 1 | 7/3 | 9/25 |
| Bullock's Oriole | ** | - | - | Before July 1 | 7/20 | 9/15 |
| Tree Swallow | *** | - | - | Before July 1 | 7/25 | 9/13 |
| Violet-green Swallow | ** | - | - | Before July 1 | 7/26 | 10/15 |
| Lucy's Warbler | * | - | - | Before July 1 | 7/27 | 10/16 |
| Yellow-breasted Chat | * | - | - | Before July 1 | 7/28 | 9/29 |
| Gull-billed Tern | * | - | - | Before July 1 | 8/1 | 9/13 |
| Cliff Swallow | *** | - | - | Before July 1 | 8/9 | 9/14 |
| Indigo Bunting | * | - | Before July 1 | 7/21 | 8/11 | 10/2 |
| Least Tern | * | - | Before July 1 | 7/15 | 8/12 | 8/29 |
| Hooded Oriole | ** | - | Before July 1 | 7/22 | 8/21 | 9/20 |
| Broad-billed Hummingbird | * | Before July 1 | 7/16 | 8/4 | 8/22 | 9/6 |
| Blue-throated Hummingbird | * | Before July 1 | 7/19 | 8/5 | 8/22 | 9/3 |
| Sulphur-bellied Flycatcher | * | Before July 1 | 7/21 | 8/4 | 8/22 | 9/3 |
| Black Skimmer | * | - | Before July 1 | 7/12 | 8/23 | 9/16 |
| Red-faced Warbler | * | - | - | 8/5 | 8/25 | 9/7 |
| Lesser Nighthawk | * | - | Before July 1 | 7/23 | 8/26 | 9/14 |
| White-winged Dove | *** | - | Before July 1 | 7/29 | 8/27 | 9/19 |
| Pigeon Guillemot | * | Before July 1 | 7/19 | 8/4 | 8/27 | 9/13 |
| Yellow-billed Cuckoo | * | - | Before July 1 | 7/28 | 8/28 | 9/19 |
| Upland Sandpiper | * | 7/26 | 8/2 | 8/14 | 8/29 | 9/10 |
| Common Nighthawk | ** | - | - | 8/4 | 9/1 | 9/22 |
| Black-headed Grosbeak | *** | - | - | Before July 1 | 9/2 | 9/30 |
| Eastern Kingbird | ** | 7/24 | 8/1 | 8/11 | 9/2 | 9/16 |
| Grace's Warbler | * | Before July 1 | 7/22 | 8/4 | 9/2 | 9/20 |
| Broad-tailed Hummingbird | *** | - | Before July 1 | 7/28 | 9/3 | 9/26 |
| Calliope Hummingbird | * | - | Before July 1 | 7/27 | 9/3 | 9/23 |
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Farnsworth and Van Doren
