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Regional Migration Forecast: 25 September – 2 October 2015

NOTE: Check out our new Traffic Reports, above!

Winter Wren, Luke Seitz.

Winter Wren, © Ryan Schain.

Continental Summary

The West will see light to moderate flights, particularly in more northern reaches, featuring Eared Grebe, Cooper’s Hawk, Red-tailed Hawk, Say’s Phoebe, Townsend’s Warbler, Brewer’s Blackbird, and Lincoln’s Sparrow, while moderate to very heavy mid to late week flights featuring Turkey Vulture, Wilson’s Snipe, Northern Flicker, Blue Jay, Black-and-white Warbler, Pine Warbler, Eastern Meadowlark, Indigo Bunting, and Field Sparrow come to the East.

Wondering what species are migrating through right now? Check out our analysis for the past 7 days.

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!

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 NortheastBirdCast Upper Midwest and Northeast Region Gulf Coast and SoutheastBirdCast Upper Southeast Region
Great Plainsbirdcast_plains West
BirdCast West Region

Upper Midwest and Northeast

Scattered and local moderate flights will be apparent across the region from the weekend through the early part of the work week as primarily southerly flow and high pressure continues to dominate. Although a disturbance passes off the Atlantic coast on Monday and Tuesday, bringing some potential for higher intensity coastal flights, a frontal boundary moving through the Upper Midwest is the primary instrument of change. Following this passage, moderate to very heavy flights will occur, first on Tuesday in the Upper Midwest and Great Lakes and then on Wednesday for most of the remainder of the region. Although southerly flow builds behind this passage event, some portions of the region, most notably along the coast, will continue to see moderate to heavy movements through the end of the week.

Field Sparrow, © Ian Davies

Field Sparrow, © Ian Davies

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Northern Harrier ** 8/1 9/26 10/20 11/10 11/27
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
Northern Pintail ** 9/1 10/3 10/31 11/20 12/11
Great Cormorant * 9/3 11/12 After Dec 31 - -
Song Sparrow NA 9/8 10/10 10/20 11/1 -
American Wigeon ** 9/9 10/5 11/1 11/23 12/19
Eastern Bluebird *** 9/9 9/25 10/19 11/11 11/29
American Robin *** 9/11 9/25 10/13 11/9 11/26
Cackling Goose * 9/12 10/1 12/8 - -
Pied-billed Grebe *** 9/12 10/10 10/31 11/22 12/11
Winter Wren *** 9/14 9/28 10/17 10/31 11/12
Orange-crowned Warbler ** 9/14 9/25 10/10 10/25 11/5
Nelson's Sparrow * 9/14 9/25 10/10 10/25 11/4
Dunlin ** 9/15 10/9 10/31 11/20 12/6
Brown Creeper *** 9/15 9/28 10/17 10/30 11/9
Saltmarsh Sparrow NA 9/15 10/10 10/20 11/5 11/15
Ruby-crowned Kinglet ****! 9/16 9/28 10/14 10/30 11/11
Yellow-rumped Warbler ****! 9/16 9/27 10/13 10/28 11/9
Swamp Sparrow ****! 9/16 9/28 10/14 10/30 11/12
White-throated Sparrow ****! 9/16 9/29 10/19 11/2 11/13
Le Conte's Sparrow * 9/17 9/29 10/15 10/31 11/12
Eastern Meadowlark ** 9/17 9/29 10/16 11/2 11/17
Snow Goose * 9/18 11/21 12/26 - -
Golden-crowned Kinglet ****! 9/18 9/30 10/18 11/2 11/15
Chipping Sparrow *** 9/18 9/27 10/9 10/30 11/13
Rusty Blackbird ** 9/18 10/3 10/23 11/10 11/25
American Black Duck *** 9/19 10/15 11/28 12/14 -
White-crowned Sparrow ****! 9/19 9/30 10/15 10/30 11/10
Hermit Thrush *** 9/20 10/3 10/19 11/5 11/17
Field Sparrow *** 9/21 10/2 10/16 11/3 11/15
Red-winged Blackbird *** 9/21 10/3 10/19 11/7 11/23
Purple Finch *** 9/21 10/6 10/24 11/11 11/25
Surf Scoter ** 9/23 10/11 11/8 11/26 12/8
Vesper Sparrow * 9/24 10/6 10/21 11/7 11/18
Pine Siskin *** 9/24 10/9 10/29 11/14 11/27
American Coot *** 9/26 10/14 11/6 11/26 12/20
Greater White-fronted Goose * 9/27 10/13 After Dec 31 - -
American Woodcock * 9/27 10/12 10/26 11/13 11/25
Brant ** 9/28 10/11 11/3 - -
Dark-eyed Junco ****! 9/28 10/14 11/2 - -
Ruddy Duck *** 9/30 10/17 11/10 11/30 -
Fox Sparrow *** 9/30 10/17 11/8 11/26 12/10
White-winged Scoter ** 10/1 10/19 11/10 11/26 12/8
Common Grackle *** 10/1 10/8 10/18 11/8 11/23
Redhead * 10/2 10/18 11/12 - -
Horned Lark * 10/2 10/25 After Dec 31 - -

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Green-winged Teal ** 8-Aug 22-Aug 27-Oct 22-Nov 10-Dec
Bald Eagle * Before July 1 2-Sep 6-Nov - -
Merlin ** 19-Aug 4-Sep 28-Sep 26-Oct 16-Nov
Turkey Vulture *** 16-Aug 5-Sep 28-Sep 31-Oct 25-Nov
Blue Jay ****! 25-Aug 8-Sep 28-Sep 16-Oct -
Northern Flicker *** 28-Aug 9-Sep 26-Sep 13-Oct 30-Oct
Red-breasted Nuthatch ** 9-Aug 9-Sep 2-Oct - -
Sharp-shinned Hawk *** 26-Aug 10-Sep 7-Oct 8-Nov 22-Nov
Cooper's Hawk *** 3-Aug 10-Sep 7-Oct 2-Nov 16-Nov
American Kestrel ** 27-Aug 10-Sep 28-Sep 19-Oct 5-Nov
Lapland Longspur * 3-Sep 15-Sep 10-Nov - -
Eastern Phoebe *** 4-Sep 16-Sep 30-Sep 20-Oct 3-Nov
Clay-colored Sparrow * 5-Sep 17-Sep 4-Oct 21-Oct 3-Nov
Palm Warbler *** 4-Sep 18-Sep 5-Oct 22-Oct 4-Nov
Blue-headed Vireo *** 6-Sep 19-Sep 4-Oct 21-Oct 2-Nov
Lincoln's Sparrow *** 7-Sep 19-Sep 5-Oct 22-Oct 2-Nov
Peregrine Falcon ** 6-Sep 20-Sep 5-Oct 22-Oct 3-Nov
Sedge Wren * 1-Sep 20-Sep 5-Oct 24-Oct 1-Nov
Marsh Wren *** 1-Sep 20-Sep 5-Oct 24-Oct -
American Pipit ** 5-Sep 21-Sep 22-Oct 17-Nov 4-Dec
Yellow-bellied Sapsucker *** 10-Sep 22-Sep 7-Oct 21-Oct 31-Oct
Harris's Sparrow * 8-Sep 22-Sep 12-Oct 28-Oct 10-Nov
Eastern Towhee *** 12-Sep 23-Sep 6-Oct 25-Oct 7-Nov
Savannah Sparrow *** 10-Sep 24-Sep 12-Oct 29-Oct 12-Nov
Eastern Bluebird *** 9-Sep 25-Sep 19-Oct 11-Nov 29-Nov
American Robin *** 11-Sep 25-Sep 13-Oct 9-Nov 26-Nov
Orange-crowned Warbler ** 14-Sep 25-Sep 10-Oct 25-Oct 5-Nov
Nelson's Sparrow * 14-Sep 25-Sep 10-Oct 25-Oct 4-Nov
Northern Harrier ** 1-Aug 26-Sep 20-Oct 10-Nov 27-Nov
Yellow-rumped Warbler ****! 16-Sep 27-Sep 13-Oct 28-Oct 9-Nov
Chipping Sparrow *** 18-Sep 27-Sep 9-Oct 30-Oct 13-Nov
Brown Creeper *** 15-Sep 28-Sep 17-Oct 30-Oct 9-Nov
Winter Wren *** 14-Sep 28-Sep 17-Oct 31-Oct 12-Nov
Ruby-crowned Kinglet ****! 16-Sep 28-Sep 14-Oct 30-Oct 11-Nov
Swamp Sparrow *** 16-Sep 28-Sep 14-Oct 30-Oct 12-Nov
Le Conte's Sparrow * 17-Sep 29-Sep 15-Oct 31-Oct 12-Nov
White-throated Sparrow ****! 16-Sep 29-Sep 19-Oct 2-Nov 13-Nov
Eastern Meadowlark ** 17-Sep 29-Sep 16-Oct 2-Nov 17-Nov
Golden-crowned Kinglet *** 18-Sep 30-Sep 18-Oct 2-Nov 15-Nov
White-crowned Sparrow *** 19-Sep 30-Sep 15-Oct 30-Oct 10-Nov
Cackling Goose * 12-Sep 1-Oct 8-Dec - -
Wilson's Snipe * 6-Aug 1-Oct 16-Oct 2-Nov 19-Nov
Field Sparrow *** 21-Sep 2-Oct 16-Oct 3-Nov 15-Nov

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Yellow-billed Cuckoo * - - Before July 1 3-Oct 17-Oct
Killdeer *** - Before July 1 2-Aug 28-Oct 26-Nov
Yellow-crowned Night-Heron * - Before July 1 3-Aug 8-Oct 28-Oct
Chimney Swift *** - - 5-Aug 10-Oct 25-Oct
Snowy Egret ** - Before July 1 7-Aug 15-Oct 3-Nov
Great Blue Heron *** - Before July 1 10-Aug 19-Oct 8-Dec
Tricolored Heron * 14-Jul 26-Jul 11-Aug 7-Oct 22-Oct
Great Egret *** Before July 1 11-Jul 12-Aug 19-Oct 6-Nov
Laughing Gull ** Before July 1 15-Jul 13-Aug 12-Nov 5-Dec
Osprey *** - Before July 1 16-Aug 15-Oct 8-Nov
Cedar Waxwing *** - Before July 1 17-Aug 27-Sep 26-Nov
Wood Duck ** Before July 1 6-Jul 18-Aug 31-Oct 21-Nov
Royal Tern * 12-Jul 31-Jul 25-Aug 10-Nov 25-Nov
Double-crested Cormorant *** - - 5-Sep 14-Nov 7-Dec
Red-eyed Vireo *** 15-Aug 25-Aug 7-Sep 28-Sep 13-Oct
Yellow-throated Vireo ** 16-Aug 25-Aug 8-Sep 26-Sep 8-Oct
Blackburnian Warbler *** 10-Aug 23-Aug 8-Sep 27-Sep 9-Oct
Blue-winged Teal ** 4-Aug 18-Aug 9-Sep 22-Oct 6-Nov
Hooded Warbler * 17-Aug 26-Aug 9-Sep 27-Sep 10-Oct
Chestnut-sided Warbler *** 11-Aug 24-Aug 9-Sep 27-Sep 9-Oct
Prairie Warbler * 4-Aug 21-Aug 9-Sep 30-Sep 13-Oct
American Golden-Plover * 11-Aug 23-Aug 10-Sep 27-Sep 13-Oct
White-eyed Vireo *** 17-Aug 27-Aug 10-Sep 28-Sep 10-Oct
Northern Waterthrush ** 28-Jul 24-Aug 10-Sep 30-Sep 12-Oct
Wood Thrush ** 23-Aug 30-Aug 11-Sep 28-Sep 15-Oct
American Redstart *** 12-Aug 27-Aug 11-Sep 30-Sep 12-Oct
Wilson's Warbler *** 15-Aug 26-Aug 11-Sep 28-Sep 9-Oct
Yellow-throated Warbler * 19-Aug 29-Aug 12-Sep 30-Sep 12-Oct
Red-headed Woodpecker * 22-Aug 1-Sep 13-Sep 2-Oct 14-Oct
Ovenbird *** 11-Aug 26-Aug 13-Sep 2-Oct 14-Oct
Black-and-white Warbler *** 10-Aug 28-Aug 13-Sep 2-Oct 14-Oct
House Wren *** 28-Aug 4-Sep 15-Sep 7-Oct 23-Oct
Scarlet Tanager *** 23-Aug 2-Sep 15-Sep 3-Oct 15-Oct
Tennessee Warbler *** 16-Aug 30-Aug 16-Sep 4-Oct 18-Oct
Bay-breasted Warbler *** 22-Aug 2-Sep 16-Sep 2-Oct 13-Oct
Rose-breasted Grosbeak *** 26-Aug 5-Sep 16-Sep 3-Oct 14-Oct
Philadelphia Vireo *** 22-Aug 3-Sep 17-Sep 2-Oct 12-Oct
Gray Catbird *** 28-Aug 6-Sep 17-Sep 9-Oct 24-Oct
Magnolia Warbler *** 20-Aug 1-Sep 17-Sep 3-Oct 15-Oct
Broad-winged Hawk *** 26-Aug 5-Sep 18-Sep 3-Oct 14-Oct
Common Yellowthroat *** 25-Aug 3-Sep 18-Sep 9-Oct 24-Oct
Swainson's Thrush *** 24-Aug 4-Sep 19-Sep 5-Oct 16-Oct
Connecticut Warbler * 25-Aug 5-Sep 19-Sep 5-Oct 16-Oct
Cape May Warbler *** 22-Aug 4-Sep 19-Sep 5-Oct 17-Oct
Belted Kingfisher *** Before July 1 27-Jul 20-Sep 14-Oct -
Northern Parula *** 25-Aug 6-Sep 20-Sep 6-Oct 18-Oct
Black-throated Green Warbler *** 24-Aug 5-Sep 20-Sep 7-Oct 19-Oct
Sora * 12-Aug 28-Aug 21-Sep 16-Oct 30-Oct
Brown Thrasher *** 27-Aug 7-Sep 21-Sep 7-Oct 20-Oct
Nashville Warbler *** 22-Aug 5-Sep 21-Sep 9-Oct 23-Oct
Red-shouldered Hawk * 24-Aug 5-Sep 22-Sep 13-Nov 22-Nov
Pine Warbler *** 22-Aug 5-Sep 22-Sep 11-Oct 25-Oct
Gray-cheeked Thrush ** 29-Aug 8-Sep 23-Sep 8-Oct 19-Oct
Blackpoll Warbler *** 27-Aug 7-Sep 23-Sep 9-Oct 21-Oct
Black-throated Blue Warbler *** 22-Aug 6-Sep 23-Sep 12-Oct 26-Oct
Indigo Bunting *** 9-Sep 14-Sep 24-Sep 11-Oct 23-Oct
Northern Flicker *** 28-Aug 9-Sep 26-Sep 13-Oct 30-Oct
Turkey Vulture *** 16-Aug 5-Sep 28-Sep 31-Oct 25-Nov
American Kestrel ** 27-Aug 10-Sep 28-Sep 19-Oct 5-Nov
Merlin ** 19-Aug 4-Sep 28-Sep 26-Oct 16-Nov
Blue Jay *** 25-Aug 8-Sep 28-Sep 16-Oct -
Eastern Phoebe *** 4-Sep 16-Sep 30-Sep 20-Oct 3-Nov

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Northern Rough-winged Swallow ** - - Before July 1 5-Aug 24-Oct
Glossy Ibis * - Before July 1 23-Jul 17-Aug 26-Sep
Yellow Warbler *** - - Before July 1 18-Aug 7-Oct
Little Blue Heron * Before July 1 21-Jul 9-Aug 26-Aug 20-Oct
Common Tern *** - Before July 1 1-Aug 26-Aug 4-Oct
Black-crowned Night-Heron * - Before July 1 31-Jul 27-Aug 30-Oct
Clapper Rail * - Before July 1 1-Aug 28-Aug 29-Oct
Tree Swallow *** - - Before July 1 30-Aug 10-Nov
American Oystercatcher * - Before July 1 29-Jul 30-Aug 25-Sep
Blue Grosbeak * Before July 1 18-Jul 5-Aug 31-Aug 17-Oct
Black-bellied Plover * 20-Jul 1-Aug 20-Aug 3-Sep 1-Dec
Semipalmated Plover *** 1-Jul 25-Jul 17-Aug 8-Sep 4-Oct
Solitary Sandpiper *** Before July 1 11-Jul 13-Aug 8-Sep 7-Oct
Lesser Yellowlegs *** - Before July 1 18-Aug 10-Sep 25-Sep
Semipalmated Sandpiper *** 1-Jul 13-Jul 16-Aug 10-Sep 28-Sep
Greater Yellowlegs ** - Before July 1 20-Aug 11-Sep 28-Nov
Stilt Sandpiper ** Before July 1 15-Jul 21-Aug 11-Sep 25-Sep
Least Sandpiper *** - Before July 1 18-Aug 11-Sep 25-Sep
Common Gallinule * - Before July 1 26-Jul 12-Sep 2-Nov
White-rumped Sandpiper * 22-Jul 6-Aug 26-Aug 13-Sep 28-Sep
Red-necked Phalarope * 28-Jul 11-Aug 27-Aug 13-Sep 27-Sep
Caspian Tern ** Before July 1 17-Jul 20-Aug 14-Sep 20-Oct
Common Nighthawk *** 7-Aug 17-Aug 31-Aug 14-Sep 25-Sep
Great Crested Flycatcher *** 12-Aug 17-Aug 25-Aug 14-Sep 26-Sep
Blue-winged Warbler ** 1-Aug 13-Aug 28-Aug 14-Sep 27-Sep
Green Heron *** - Before July 1 13-Aug 15-Sep 7-Oct
Red Knot * - Before July 1 28-Aug 15-Sep 28-Sep
Baird's Sandpiper ** 6-Aug 17-Aug 30-Aug 15-Sep 25-Sep
Olive-sided Flycatcher * 4-Aug 16-Aug 30-Aug 15-Sep 27-Sep
Blue-gray Gnatcatcher *** 4-Aug 14-Aug 25-Aug 15-Sep 29-Sep
Canada Warbler *** 5-Aug 16-Aug 30-Aug 15-Sep 26-Sep
Buff-breasted Sandpiper ** 10-Aug 20-Aug 3-Sep 17-Sep 28-Sep
Western Sandpiper * Before July 1 15-Jul 24-Aug 17-Sep 1-Oct
Kentucky Warbler * 15-Aug 21-Aug 31-Aug 17-Sep 29-Sep
Whimbrel * Before July 1 9-Jul 1-Aug 18-Sep 4-Oct
Forster's Tern * - Before July 1 17-Aug 18-Sep 30-Nov
Eastern Whip-poor-will * 16-Aug 21-Aug 30-Aug 19-Sep 2-Oct
Warbling Vireo *** 13-Aug 21-Aug 3-Sep 19-Sep 30-Sep
Bobolink ** 5-Aug 16-Aug 31-Aug 19-Sep 15-Oct
Ruby-throated Hummingbird *** 30-Jul 14-Aug 28-Aug 21-Sep 5-Oct
Yellow-bellied Flycatcher * 9-Aug 20-Aug 5-Sep 21-Sep 4-Oct
Mourning Warbler * 4-Aug 15-Aug 1-Sep 21-Sep 7-Oct
Eastern Wood-Pewee *** 5-Aug 16-Aug 29-Aug 22-Sep 9-Oct
Least Flycatcher *** 7-Aug 18-Aug 3-Sep 22-Sep 5-Oct
Veery *** 13-Aug 22-Aug 5-Sep 22-Sep 5-Oct
Black Skimmer * - Before July 1 23-Jul 22-Sep 21-Oct
Sanderling ** - Before July 1 1-Sep 23-Sep 6-Oct
Golden-winged Warbler * 11-Aug 22-Aug 7-Sep 23-Sep 5-Oct
Pectoral Sandpiper * Before July 1 18-Jul 16-Aug 24-Sep 20-Nov
Yellow-throated Vireo *** 16-Aug 25-Aug 8-Sep 26-Sep 8-Oct
American Golden-Plover ** 11-Aug 23-Aug 10-Sep 27-Sep 13-Oct
Cedar Waxwing *** - Before July 1 17-Aug 27-Sep 26-Nov
Hooded Warbler * 17-Aug 26-Aug 9-Sep 27-Sep 10-Oct
Blackburnian Warbler *** 10-Aug 23-Aug 8-Sep 27-Sep 9-Oct
Chestnut-sided Warbler *** 11-Aug 24-Aug 9-Sep 27-Sep 9-Oct
White-eyed Vireo *** 17-Aug 27-Aug 10-Sep 28-Sep 10-Oct
Red-eyed Vireo *** 15-Aug 25-Aug 7-Sep 28-Sep 13-Oct
Wood Thrush ** 23-Aug 30-Aug 11-Sep 28-Sep 15-Oct
Wilson's Warbler *** 15-Aug 26-Aug 11-Sep 28-Sep 9-Oct
Northern Waterthrush *** 28-Jul 24-Aug 10-Sep 30-Sep 12-Oct
American Redstart *** 12-Aug 27-Aug 11-Sep 30-Sep 12-Oct
Yellow-throated Warbler * 19-Aug 29-Aug 12-Sep 30-Sep 12-Oct
Prairie Warbler ** 4-Aug 21-Aug 9-Sep 30-Sep 13-Oct
Red-headed Woodpecker ** 22-Aug 1-Sep 13-Sep 2-Oct 14-Oct
Philadelphia Vireo *** 22-Aug 3-Sep 17-Sep 2-Oct 12-Oct
Ovenbird *** 11-Aug 26-Aug 13-Sep 2-Oct 14-Oct
Black-and-white Warbler *** 10-Aug 28-Aug 13-Sep 2-Oct 14-Oct
Bay-breasted Warbler *** 22-Aug 2-Sep 16-Sep 2-Oct 13-Oct

Gulf Coast and Southeast

Moderate to locally heavy flights will begin the weekend in many areas. However, these intensities will not last, as unfavorable conditions building gradually into the region quite the migration scene substantially. Changes come by Wednesday, when more favorable northerly winds and slightly cooler temperatures return, bringing a new pulse of moderate to very heavy flights from Texas through the southern Appalachians. The intensity of these flights continues through the remainder of the period, but in an increasingly localized area of the Southeast. Some areas of the Florida Panhandle north and east through the Carolinas may continue to experience very heavy flights during these movements (offering potentially good opportunities for moon watching!).

Pine Warbler, Ryan Schain.

Pine Warbler, © Luke Seitz.

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Great Blue Heron ** 7/27 10/21 11/19 - -
Black Vulture ** 8/25 10/15 After Dec 31 - -
American Avocet * 9/1 10/20 11/5 11/24 12/8
Blue-headed Vireo * 9/1 10/18 12/18 After Dec 31 -
American Kestrel *** 9/9 10/7 11/14 - -
American Bittern * 9/12 10/14 11/25 - -
Brown-headed Cowbird ** 9/12 9/26 10/25 11/11 11/22
Blackpoll Warbler * 9/13 9/25 10/10 10/26 11/6
Northern Flicker ****! 9/14 9/29 10/18 11/2 -
Indigo Bunting *** 9/15 9/25 10/9 10/26 11/8
Palm Warbler ****! 9/15 9/29 10/19 11/2 11/12
Red-breasted Nuthatch * 9/15 10/6 11/3 - -
Marsh Wren ** 9/19 10/8 10/29 - -
Wilson's Snipe ** 9/20 10/19 12/15 - -
House Wren *** 9/21 10/8 10/27 11/11 -
Eastern Phoebe ****! 9/22 10/11 10/31 11/12 -
Tree Swallow *** 9/22 10/8 10/30 - -
Lincoln's Sparrow *** 9/24 10/10 10/29 - -
Red-winged Blackbird *** 9/24 10/13 11/7 11/19 11/30
Double-crested Cormorant *** 9/25 10/17 11/21 11/27 12/1
Nelson's Sparrow * 9/25 10/8 10/25 - -
Common Grackle *** 9/26 10/11 10/25 11/10 11/20
Northern Harrier *** 9/26 10/21 11/17 - -
Painted Bunting * 9/26 10/3 10/13 10/29 11/8
Yellow-bellied Sapsucker *** 9/26 10/10 12/17 After Dec 31 -
Herring Gull ** 9/29 12/30 After Dec 31 - -
Saltmarsh Sparrow * 9/29 10/12 12/11 After Dec 31 -
Sedge Wren ** 9/30 10/14 12/18 - -
Ruby-crowned Kinglet ****! 10/1 10/16 12/15 - -
Eastern Meadowlark *** 10/2 10/16 11/3 11/14 -
Pied-billed Grebe *** 10/2 10/23 11/25 - -

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Black-bellied Plover * 7/23 8/6 11/2 - -
Caspian Tern * 7/26 8/13 10/26 11/23 -
Blue-winged Teal ** 8/8 8/25 11/2 - -
Black-billed Cuckoo * 8/17 9/5 9/26 10/18 11/1
Black-and-white Warbler *** 8/18 9/6 9/26 10/18 11/5
Pine Warbler *** 8/13 9/6 10/3 - -
Yellow-throated Warbler ** 7/31 9/6 9/26 10/19 11/4
Broad-winged Hawk ** 8/28 9/9 9/25 10/13 11/1
Ovenbird *** 8/26 9/9 9/27 10/16 11/2
Sora * 8/29 9/10 12/18 - -
American Redstart *** 8/29 9/11 9/28 10/16 10/30
Cooper's Hawk ** 7/29 9/11 10/24 11/11 11/22
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
Nashville Warbler *** 8/30 9/13 10/4 10/26 11/15
Belted Kingfisher *** 8/12 9/14 10/26 - -
Magnolia Warbler *** 9/1 9/14 10/1 10/19 11/1
Swainson's Thrush *** 9/3 9/14 9/29 10/15 10/27
Clay-colored Sparrow * 9/2 9/15 10/4 10/21 11/4
Eastern Towhee ** 9/7 9/15 10/21 11/8 11/22
Tennessee Warbler *** 8/31 9/15 10/3 10/22 11/5
Common Yellowthroat *** 9/2 9/16 10/5 10/23 11/6
Wood Thrush ** 9/3 9/16 10/2 10/19 10/31
Gray-cheeked Thrush ** 9/6 9/17 10/2 10/19 10/30
Merlin ** 9/3 9/17 10/11 11/1 11/18
Sharp-shinned Hawk ** 9/2 9/17 10/28 11/12 11/22
Bald Eagle * 8/21 9/18 After Dec 31 - -
Brown Thrasher *** 9/3 9/18 10/5 10/24 11/7
Rose-breasted Grosbeak *** 9/7 9/19 10/4 10/21 11/1
Black-throated Blue Warbler *** 9/5 9/20 10/6 10/25 11/7
Northern Mockingbird *** 9/6 9/20 10/12 - -
Scissor-tailed Flycatcher ** 9/6 9/20 10/5 11/1 11/19
Bay-breasted Warbler * 9/7 9/21 10/7 10/25 11/6
Black-throated Green Warbler *** 9/7 9/22 10/8 10/27 11/9
Peregrine Falcon ** 9/9 9/22 10/8 10/23 11/3
Gray Catbird *** 9/12 9/24 10/10 10/26 11/7
Blackpoll Warbler * 9/13 9/25 10/10 10/26 11/6
Indigo Bunting *** 9/15 9/25 10/9 10/26 11/8
Brown-headed Cowbird ** 9/12 9/26 10/25 11/11 11/22
Northern Flicker *** 9/14 9/29 10/18 11/2 -
Palm Warbler *** 9/15 9/29 10/19 11/2 11/12

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Cattle Egret ** - - 8/12 9/25 -
Cave Swallow * - - 9/1 9/26 11/26
Willow Flycatcher * 8/5 8/19 9/5 9/25 10/9
Yellow Warbler *** 7/29 8/16 9/7 9/29 10/15
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
Mourning Warbler * 8/15 8/27 9/12 9/28 10/10
Blue-gray Gnatcatcher *** 8/4 8/25 9/13 10/1 10/14
Ruby-throated Hummingbird *** 7/26 8/30 9/13 10/5 10/20
Swainson's Warbler * 8/14 8/25 9/13 10/5 10/24
Baltimore Oriole *** 8/18 8/30 9/14 9/30 10/10
Least Flycatcher ** 8/15 8/30 9/14 10/1 10/13
Summer Tanager *** 8/19 8/31 9/15 10/4 10/19
Worm-eating Warbler ** 8/9 8/29 9/15 10/4 10/17
Yellow-bellied Flycatcher * 8/15 8/31 9/15 10/3 10/15
Yellow-throated Vireo *** 8/16 8/30 9/15 10/3 10/17
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
Chuck-will's-widow * 8/15 8/31 9/17 10/6 10/20
Warbling Vireo * 8/23 9/3 9/17 10/3 10/14
Red-headed Woodpecker ** 8/24 9/4 9/18 10/6 11/11
Eastern Wood-Pewee *** 8/16 9/1 9/19 10/12 10/29
Northern Waterthrush *** 8/19 9/3 9/19 10/7 10/21
Red-eyed Vireo *** 8/22 9/5 9/19 10/8 10/23
Wilson's Warbler *** 8/23 9/4 9/19 10/4 10/14
Chimney Swift *** 8/27 9/7 9/20 10/11 10/25
Hooded Warbler *** 8/3 9/3 9/20 10/11 10/27
White-eyed Vireo *** 8/19 9/3 9/20 10/11 10/30
Bobolink * 8/21 9/4 9/21 10/9 10/23
Veery ** 8/28 9/7 9/21 10/5 10/16
Blackburnian Warbler ** 8/24 9/6 9/22 10/9 10/23
Chestnut-sided Warbler *** 8/25 9/6 9/22 10/10 10/23
Golden-winged Warbler * 8/27 9/7 9/22 10/7 10/19
Northern Parula *** 8/7 9/3 9/23 10/17 11/2
Prairie Warbler *** 7/23 9/8 9/23 10/13 10/30
Broad-winged Hawk ** 8/28 9/9 9/25 10/13 11/1
Black-and-white Warbler *** 8/18 9/6 9/26 10/18 11/5
Black-billed Cuckoo * 8/17 9/5 9/26 10/18 11/1
Yellow-throated Warbler ** 7/31 9/6 9/26 10/19 11/4
Ovenbird *** 8/26 9/9 9/27 10/16 11/2
Scarlet Tanager *** 8/31 9/12 9/27 10/15 10/28
American Redstart *** 8/29 9/11 9/28 10/16 10/30
Swainson's Hawk * - - 9/28 10/23 11/19
Cape May Warbler ** 8/31 9/12 9/29 10/16 10/31
Swainson's Thrush *** 9/3 9/14 9/29 10/15 10/27
Magnolia Warbler *** 9/1 9/14 10/1 10/19 11/1
Gray-cheeked Thrush ** 9/6 9/17 10/2 10/19 10/30
Wood Thrush ** 9/3 9/16 10/2 10/19 10/31

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Cliff Swallow ** - - Before July 1 8-Jul 7-Oct
Least Bittern * - - Before July 1 1-Aug 18-Oct
Blue Grosbeak ** - - Before July 1 26-Aug 1-Nov
Gull-billed Tern * - Before July 1 23-Jul 7-Sep 29-Sep
Barn Swallow *** - Before July 1 8-Aug 8-Sep 5-Nov
Sandwich Tern * Before July 1 28-Jul 19-Aug 8-Sep 9-Dec
Wilson's Plover * Before July 1 27-Jul 15-Aug 8-Sep 26-Sep
Semipalmated Plover ** 14-Jul 30-Jul 21-Aug 10-Sep 2-Oct
Louisiana Waterthrush * - - Before July 1 11-Sep 29-Sep
Orchard Oriole ** - - 13-Aug 12-Sep 30-Sep
Spotted Sandpiper *** Before July 1 19-Jul 17-Aug 12-Sep 3-Oct
Wilson's Phalarope * 19-Jul 2-Aug 22-Aug 12-Sep 3-Oct
Black Tern *** 20-Jul 8-Aug 24-Aug 13-Sep 27-Sep
Solitary Sandpiper ** - Before July 1 17-Aug 13-Sep 5-Oct
Cerulean Warbler * 1-Aug 13-Aug 28-Aug 14-Sep 26-Sep
Short-billed Dowitcher * Before July 1 3-Jul 27-Aug 14-Sep 25-Sep
Stilt Sandpiper * 5-Jul 21-Jul 15-Aug 14-Sep 21-Nov
Bank Swallow ** 6-Aug 17-Aug 1-Sep 16-Sep 28-Sep
Black-necked Stilt * 14-Jul 27-Jul 11-Aug 16-Sep 28-Nov
Gray Kingbird * - - 14-Aug 16-Sep 11-Oct
Semipalmated Sandpiper ** Before July 1 15-Jul 23-Aug 16-Sep 15-Oct
Buff-breasted Sandpiper * 31-Jul 14-Aug 30-Aug 17-Sep 30-Sep
Bullock's Oriole * 13-Aug 21-Aug 2-Sep 18-Sep 30-Sep
Common Nighthawk *** 10-Aug 18-Aug 28-Aug 19-Sep 4-Oct
Alder Flycatcher * 4-Aug 17-Aug 3-Sep 20-Sep 4-Oct
American Golden-Plover * 10-Aug 21-Aug 5-Sep 20-Sep 1-Oct
Black-chinned Hummingbird ** - - Before July 1 20-Sep 10-Oct
Brown-crested Flycatcher * 16-Aug 23-Aug 1-Sep 20-Sep 2-Oct
Great Crested Flycatcher *** 11-Aug 20-Aug 1-Sep 20-Sep 5-Oct
Green Heron *** - - Before July 1 20-Sep 9-Oct
Western Sandpiper ** Before July 1 11-Jul 1-Sep 20-Sep 2-Oct
Eastern Kingbird *** - - 4-Jul 21-Sep 7-Oct
Pectoral Sandpiper ** Before July 1 26-Jul 18-Aug 22-Sep 8-Oct
White-rumped Sandpiper * 8-Aug 20-Aug 5-Sep 22-Sep 5-Oct
Bell's Vireo * 8-Aug 18-Aug 29-Aug 23-Sep 10-Oct
Olive-sided Flycatcher ** 6-Aug 19-Aug 5-Sep 23-Sep 7-Oct
Prothonotary Warbler ** 2-Aug 11-Aug 28-Aug 23-Sep 9-Oct
Baird's Sandpiper * 8-Jul 28-Jul 20-Aug 24-Sep 9-Oct
Common Tern * Before July 1 20-Jul 22-Aug 24-Sep 9-Nov
Dickcissel * 10-Aug 19-Aug 2-Sep 24-Sep 16-Oct
Kentucky Warbler * 4-Aug 15-Aug 2-Sep 24-Sep 9-Oct
Yellow-crowned Night-Heron * - - Before July 1 24-Sep 21-Oct
Willow Flycatcher * 5-Aug 19-Aug 5-Sep 25-Sep 9-Oct
Yellow-breasted Chat ** 13-Aug 23-Aug 7-Sep 25-Sep 9-Oct
Canada Warbler ** 13-Aug 24-Aug 9-Sep 26-Sep 9-Oct
Cave Swallow * - - 1-Sep 26-Sep 26-Nov
Mourning Warbler ** 15-Aug 27-Aug 12-Sep 28-Sep 10-Oct
Yellow Warbler *** 29-Jul 16-Aug 7-Sep 29-Sep 15-Oct
Baltimore Oriole *** 18-Aug 30-Aug 14-Sep 30-Sep 10-Oct
Blue-gray Gnatcatcher *** 4-Aug 25-Aug 13-Sep 1-Oct 14-Oct
Least Flycatcher *** 15-Aug 30-Aug 14-Sep 1-Oct 13-Oct

Great Plains

A quiet weekend of light to locally moderate movements yields to much more exciting movements by Monday night. A frontal boundary pushing across the region will bring moderate to very heavy flights in the northern Plains on Monday night, then more broadly to the region on Tuesday night. Following this intense and extensive pulse, conditions will be at best locally marginal on some nights for the remainder of the period. Where and when these conditions occur will determine where and when movements of light to moderate intensity follow.

Le Conte's Sparrow, Ryan Schain.

Le Conte’s Sparrow, © Luke Seitz.

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 *** 16-Jul 23-Oct 10-Nov 29-Nov -
Wilson's Snipe * 7-Aug 3-Oct 18-Oct 4-Nov 16-Nov
Pine Siskin * 23-Aug 11-Oct 28-Dec - -
Purple Finch * 31-Aug 9-Dec After Dec 31 - -
Sharp-shinned Hawk *** 31-Aug 25-Sep 10-Oct - -
Yellow-bellied Sapsucker * 7-Sep 7-Dec After Dec 31 - -
Double-crested Cormorant *** 8-Sep 25-Sep 22-Oct 24-Nov 17-Dec
Red-tailed Hawk *** 8-Sep 28-Sep 29-Oct 14-Nov 25-Nov
American Coot *** 11-Sep 3-Oct 29-Oct 21-Nov 10-Dec
Yellow-rumped Warbler ****! 12-Sep 25-Sep 13-Oct 29-Oct 10-Nov
White-throated Sparrow *** 13-Sep 28-Sep 18-Oct 3-Nov 16-Nov
Savannah Sparrow *** 14-Sep 27-Sep 13-Oct 30-Oct 12-Nov
Hermit Thrush ** 15-Sep 28-Sep 15-Oct 30-Oct -
Sprague's Pipit * 15-Sep 27-Sep 11-Oct 28-Oct 8-Nov
Sedge Wren *** 16-Sep 26-Sep 10-Oct 26-Oct 6-Nov
White-crowned Sparrow *** 16-Sep 30-Sep 18-Oct 3-Nov 15-Nov
Winter Wren * 16-Sep 11-Oct 3-Nov - -
American Pipit *** 17-Sep 4-Oct 24-Oct 12-Nov 26-Nov
Eastern Meadowlark *** 17-Sep 1-Oct 19-Oct 5-Nov 17-Nov
Nelson's Sparrow ** 17-Sep 27-Sep 10-Oct 25-Oct 4-Nov
Field Sparrow *** 18-Sep 30-Sep 18-Oct 6-Nov 17-Nov
Harris's Sparrow *** 18-Sep 6-Oct 2-Nov - -
Swamp Sparrow *** 18-Sep 30-Sep 17-Oct 2-Nov 13-Nov
Le Conte's Sparrow *** 21-Sep 1-Oct 17-Oct 1-Nov 12-Nov
Song Sparrow *** 21-Sep 6-Oct 25-Oct 9-Nov 19-Nov
Northern Harrier *** 24-Sep 11-Oct 29-Oct 12-Nov 21-Nov
Dark-eyed Junco ****! 26-Sep 13-Oct 29-Dec - -
Surf Scoter * 26-Sep 10-Oct 28-Oct 15-Nov 30-Nov
Brown Creeper *** 27-Sep 14-Oct 20-Dec - -
Golden-crowned Kinglet *** 27-Sep 12-Oct 15-Dec After Dec 31 -
Tundra Swan ** 28-Sep 15-Oct 30-Oct 18-Nov 30-Nov
Herring Gull *** 30-Sep 22-Oct 28-Nov After Dec 31 -
Fox Sparrow *** 2-Oct 14-Oct 30-Oct 12-Nov 24-Nov

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Black-bellied Plover * 20-Jul 30-Jul 29-Sep 15-Nov 28-Nov
Greater Yellowlegs * - 1-Aug 26-Oct 13-Nov 25-Nov
Cooper's Hawk ** 8-Aug 2-Sep 25-Sep 20-Oct 10-Nov
American Golden-Plover * 6-Aug 3-Sep 27-Sep 23-Oct 19-Nov
Red-shouldered Hawk * 11-Aug 5-Sep 30-Sep 26-Oct -
Merlin * 16-Aug 6-Sep 26-Oct - -
Sora * 18-Aug 6-Sep 29-Sep 22-Oct 5-Nov
American White Pelican ** 22-Aug 9-Sep 16-Oct 18-Nov 9-Dec
Palm Warbler * 31-Aug 11-Sep 27-Sep 13-Oct 25-Oct
Pied-billed Grebe *** 30-Aug 12-Sep 31-Oct 20-Nov 6-Dec
Northern Flicker *** 30-Aug 13-Sep 7-Oct 26-Oct 5-Nov
Common Yellowthroat *** 1-Sep 15-Sep 25-Sep 9-Oct 14-Oct
Indigo Bunting * 1-Sep 15-Sep 1-Oct 10-Oct 21-Oct
Canada Goose ** - 16-Sep 25-Nov - -
Franklin's Gull *** 1-Sep 16-Sep 13-Oct 10-Nov 25-Nov
Scissor-tailed Flycatcher ** 6-Sep 16-Sep 28-Sep 19-Oct 2-Nov
Orange-crowned Warbler *** 3-Sep 17-Sep 3-Oct 21-Oct 2-Nov
Ruby-crowned Kinglet *** 6-Sep 21-Sep 10-Oct 27-Oct 10-Nov
Western Meadowlark *** 11-Sep 21-Sep 8-Oct 3-Nov 19-Nov
Marsh Wren ** 9-Sep 22-Sep 9-Oct 26-Oct 9-Nov
Red-winged Blackbird *** 9-Sep 22-Sep 24-Oct 13-Nov 27-Nov
Common Grackle *** 12-Sep 23-Sep 8-Oct 31-Oct 16-Nov
Lincoln's Sparrow *** 8-Sep 23-Sep 10-Oct 28-Oct 10-Nov
Vesper Sparrow *** 9-Sep 23-Sep 8-Oct 26-Oct 8-Nov
Double-crested Cormorant *** 8-Sep 25-Sep 22-Oct 24-Nov 17-Dec
Sharp-shinned Hawk *** 31-Aug 25-Sep 10-Oct - -
Yellow-rumped Warbler ****! 12-Sep 25-Sep 13-Oct 29-Oct 10-Nov
Sedge Wren ** 16-Sep 26-Sep 10-Oct 26-Oct 6-Nov
Nelson's Sparrow * 17-Sep 27-Sep 10-Oct 25-Oct 4-Nov
Savannah Sparrow *** 14-Sep 27-Sep 13-Oct 30-Oct 12-Nov
Sprague's Pipit * 15-Sep 27-Sep 11-Oct 28-Oct 8-Nov
Hermit Thrush * 15-Sep 28-Sep 15-Oct 30-Oct -
Red-tailed Hawk *** 8-Sep 28-Sep 29-Oct 14-Nov 25-Nov
White-throated Sparrow *** 13-Sep 28-Sep 18-Oct 3-Nov 16-Nov
Field Sparrow *** 18-Sep 30-Sep 18-Oct 6-Nov 17-Nov
Swamp Sparrow *** 18-Sep 30-Sep 17-Oct 2-Nov 13-Nov
White-crowned Sparrow *** 16-Sep 30-Sep 18-Oct 3-Nov 15-Nov
Eastern Meadowlark *** 17-Sep 1-Oct 19-Oct 5-Nov 17-Nov
Le Conte's Sparrow *** 21-Sep 1-Oct 17-Oct 1-Nov 12-Nov

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Killdeer *** Before July 1 4-Jul 2-Aug 3-Nov 28-Nov
Cattle Egret * - - 5-Aug 30-Sep 3-Nov
Chimney Swift *** - 25-Jul 10-Aug 10-Oct 25-Oct
Snowy Egret ** Before July 1 5-Jul 18-Aug 2-Oct 24-Oct
Wood Duck ** Before July 1 1-Jul 19-Aug 27-Oct 19-Nov
Chipping Sparrow *** - - 1-Sep 31-Oct 14-Nov
Common Tern * - - 1-Sep 7-Oct 1-Nov
Mourning Dove *** - - 1-Sep 6-Oct 26-Oct
Rose-breasted Grosbeak ** 12-Aug 22-Aug 4-Sep 25-Sep 10-Oct
White-faced Ibis * Before July 1 14-Aug 4-Sep 1-Oct 27-Oct
Black-crowned Night-Heron * - - 5-Sep 26-Sep 12-Oct
Say's Phoebe ** 12-Aug 25-Aug 7-Sep 28-Sep 11-Oct
Swainson's Hawk *** 28-Jul 21-Aug 7-Sep 4-Oct 21-Oct
Magnolia Warbler * 13-Aug 24-Aug 9-Sep 25-Sep 7-Oct
Red-necked Phalarope * 1-Jul 25-Aug 9-Sep 30-Sep 14-Oct
House Wren *** 25-Aug 1-Sep 10-Sep 3-Oct 19-Oct
Sanderling * 1-Jul 28-Jul 10-Sep 3-Oct 21-Oct
Tennessee Warbler ** 7-Aug 22-Aug 10-Sep 30-Sep 16-Oct
White-eyed Vireo ** 19-Aug 28-Aug 10-Sep 29-Sep 11-Oct
Blackpoll Warbler * 15-Aug 27-Aug 11-Sep 27-Sep 8-Oct
Brown Thrasher *** 19-Aug 30-Aug 11-Sep 30-Sep 12-Oct
Caspian Tern * 1-Jul 15-Aug 11-Sep 30-Sep 13-Oct
Gray Catbird *** 18-Aug 30-Aug 11-Sep 1-Oct 14-Oct
Great Egret *** - 15-Jul 11-Sep 16-Oct 10-Nov
Northern Parula ** 17-Aug 27-Aug 11-Sep 29-Sep 11-Oct
Philadelphia Vireo * 15-Aug 27-Aug 12-Sep 29-Sep 10-Oct
Swainson's Thrush *** 18-Aug 30-Aug 13-Sep 29-Sep 10-Oct
Yellow-headed Blackbird *** 15-Aug 5-Sep 15-Sep 30-Sep 12-Oct
Blue-headed Vireo ** 19-Aug 1-Sep 18-Sep 5-Oct 18-Oct
Blue-winged Teal *** 2-Aug 18-Aug 18-Sep 25-Oct 13-Nov
Summer Tanager *** 28-Aug 6-Sep 18-Sep 5-Oct 17-Oct
Black-throated Green Warbler * 17-Aug 1-Sep 19-Sep 7-Oct 22-Oct
Peregrine Falcon * Before July 1 26-Jul 19-Sep 10-Oct 28-Oct
Broad-winged Hawk * 28-Aug 7-Sep 20-Sep 7-Oct 19-Oct
Turkey Vulture *** 20-Aug 8-Sep 22-Sep 16-Oct 30-Oct
Eastern Phoebe *** 27-Aug 9-Sep 23-Sep 14-Oct 29-Oct
Nashville Warbler *** 24-Aug 6-Sep 23-Sep 10-Oct 24-Oct
Clay-colored Sparrow *** 20-Aug 3-Sep 24-Sep 16-Oct 31-Oct
Osprey *** 25-Aug 7-Sep 24-Sep 11-Oct 12-Nov
Common Yellowthroat *** 1-Sep 15-Sep 25-Sep 9-Oct 14-Oct
Cooper's Hawk ** 8-Aug 2-Sep 25-Sep 20-Oct 10-Nov
American Golden-Plover * 6-Aug 3-Sep 27-Sep 23-Oct 19-Nov
Palm Warbler * 31-Aug 11-Sep 27-Sep 13-Oct 25-Oct
Scissor-tailed Flycatcher *** 6-Sep 16-Sep 28-Sep 19-Oct 2-Nov
Black-bellied Plover * 20-Jul 30-Jul 29-Sep 15-Nov 28-Nov
Sora * 18-Aug 6-Sep 29-Sep 22-Oct 5-Nov
Red-shouldered Hawk * 11-Aug 5-Sep 30-Sep 26-Oct -
Indigo Bunting *** 1-Sep 15-Sep 1-Oct 10-Oct 21-Oct

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Northern Rough-winged Swallow ** - - Before July 1 15-Jul 19-Oct
Yellow-billed Cuckoo *** - - Before July 1 22-Aug 4-Oct
Least Bittern * - - Before July 1 25-Aug 30-Sep
Pectoral Sandpiper ** Before July 1 20-Jul 10-Aug 26-Aug 20-Oct
Yellow-crowned Night-Heron * - Before July 1 31-Jul 26-Aug 5-Oct
Cliff Swallow *** - - Before July 1 2-Sep 25-Sep
Short-billed Dowitcher * Before July 1 6-Jul 7-Aug 2-Sep 4-Oct
Tree Swallow ** - - Before July 1 4-Sep 8-Nov
Marbled Godwit * - - Before July 1 8-Sep 2-Oct
Willet * - - Before July 1 8-Sep 5-Oct
Lark Sparrow *** - - Before July 1 10-Sep 28-Sep
Baird's Sandpiper ** ]+D11 10-Jul 13-Aug 11-Sep 3-Oct
Buff-breasted Sandpiper * 23-Jul 3-Aug 21-Aug 12-Sep 29-Sep
Snowy Plover * - - Before July 1 12-Sep 3-Oct
Solitary Sandpiper *** Before July 1 6-Jul 16-Aug 12-Sep 28-Sep
Spotted Sandpiper *** Before July 1 6-Jul 7-Aug 12-Sep 1-Oct
Bank Swallow *** Before July 1 5-Jul 12-Aug 13-Sep 29-Sep
Lark Bunting ** - - 17-Aug 13-Sep 30-Sep
Black Tern *** Before July 1 5-Jul 17-Aug 14-Sep 2-Oct
Semipalmated Sandpiper *** 1-Jul 15-Jul 15-Aug 14-Sep 3-Oct
Blackburnian Warbler * 3-Aug 15-Aug 30-Aug 15-Sep 27-Sep
Forster's Tern ** Before July 1 26-Jul 20-Aug 15-Sep 26-Oct
Great Crested Flycatcher *** 11-Aug 17-Aug 25-Aug 15-Sep 27-Sep
Northern Waterthrush ** 7-Aug 17-Aug 31-Aug 15-Sep 25-Sep
Stilt Sandpiper ** Before July 1 8-Jul 26-Aug 15-Sep 30-Sep
Wilson's Phalarope *** - Before July 1 21-Aug 15-Sep 2-Oct
Least Sandpiper *** - 10-Jul 26-Aug 16-Sep 30-Sep
Little Blue Heron ** - 10-Jul 24-Aug 16-Sep 2-Oct
Black-necked Stilt * - - 7-Aug 17-Sep 4-Oct
Semipalmated Plover ** 1-Jul 21-Jul 19-Aug 17-Sep 11-Oct
Yellow Warbler *** 1-Aug 12-Aug 26-Aug 17-Sep 1-Oct
Yellow-bellied Flycatcher * 6-Aug 17-Aug 1-Sep 17-Sep 28-Sep
Green Heron *** Before July 1 2-Jul 11-Aug 18-Sep 10-Oct
Lesser Yellowlegs ** - Before July 1 21-Aug 18-Sep 15-Nov
Mourning Warbler * 10-Aug 20-Aug 3-Sep 18-Sep 29-Sep
Olive-sided Flycatcher *** 9-Aug 19-Aug 2-Sep 18-Sep 29-Sep
Eastern Wood-Pewee *** Before July 1 5-Aug 22-Aug 19-Sep 6-Oct
Red-eyed Vireo *** 11-Aug 19-Aug 31-Aug 19-Sep 2-Oct
American Redstart *** 10-Aug 20-Aug 3-Sep 20-Sep 2-Oct
Black-and-white Warbler *** 10-Aug 20-Aug 4-Sep 20-Sep 3-Oct
Chestnut-sided Warbler ** 11-Aug 21-Aug 5-Sep 20-Sep 2-Oct
Least Flycatcher *** 8-Aug 19-Aug 3-Sep 20-Sep 3-Oct
Ovenbird ** 10-Aug 20-Aug 4-Sep 20-Sep 2-Oct
Yellow-throated Vireo ** 11-Aug 20-Aug 2-Sep 20-Sep 2-Oct
Blue-gray Gnatcatcher *** 2-Aug 15-Aug 27-Aug 21-Sep 5-Oct
Ruby-throated Hummingbird *** Before July 1 29-Jul 28-Aug 21-Sep 8-Oct
Warbling Vireo *** 10-Aug 6-Sep 12-Sep 21-Sep 3-Oct
Common Nighthawk *** - - 28-Aug 22-Sep 8-Oct
Red-headed Woodpecker *** 31-Jul 13-Aug 27-Aug 23-Sep 13-Oct
Yellow-breasted Chat * 20-Aug 26-Aug 4-Sep 24-Sep 8-Oct
Magnolia Warbler * 13-Aug 24-Aug 9-Sep 25-Sep 7-Oct
Rose-breasted Grosbeak ** 12-Aug 22-Aug 4-Sep 25-Sep 10-Oct
Black-crowned Night-Heron * - - 5-Sep 26-Sep 12-Oct
Blackpoll Warbler * 15-Aug 27-Aug 11-Sep 27-Sep 8-Oct
Say's Phoebe ** 12-Aug 25-Aug 7-Sep 28-Sep 11-Oct
Northern Parula ** 17-Aug 27-Aug 11-Sep 29-Sep 11-Oct
Philadelphia Vireo ** 15-Aug 27-Aug 12-Sep 29-Sep 10-Oct
Swainson's Thrush *** 18-Aug 30-Aug 13-Sep 29-Sep 10-Oct
White-eyed Vireo ** 19-Aug 28-Aug 10-Sep 29-Sep 11-Oct
Brown Thrasher *** 19-Aug 30-Aug 11-Sep 30-Sep 12-Oct
Caspian Tern * 1-Jul 15-Aug 11-Sep 30-Sep 13-Oct
Cattle Egret * - - 5-Aug 30-Sep 3-Nov
Red-necked Phalarope * 1-Jul 25-Aug 9-Sep 30-Sep 14-Oct
Tennessee Warbler ** 7-Aug 22-Aug 10-Sep 30-Sep 16-Oct
Yellow-headed Blackbird *** 15-Aug 5-Sep 15-Sep 30-Sep 12-Oct
Gray Catbird *** 18-Aug 30-Aug 11-Sep 1-Oct 14-Oct
White-faced Ibis * Before July 1 14-Aug 4-Sep 1-Oct 27-Oct
Snowy Egret ** Before July 1 5-Jul 18-Aug 2-Oct 24-Oct

West

Moderate flights kick off the weekend from California north along the Pacific Coast and across the northern tier states. These will continue, and expand to additional areas of the Desert Southwest and the Rockies through Monday night. More marginal conditions, with less intense movements, follow on Tuesday and Wednesday. But moderate flights will return to many areas by Wednesday and Thursday nights, including in the Pacific Northwest and northern Rockies and California and the Great Basin, respectively.

Varied Thrush, Ryan Schain.

Varied Thrush, © Ryan Schain.

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 -
Pied-billed Grebe ** 7/27 10/18 11/11 11/29 -
Northern Harrier ** 8/12 10/29 11/20 - -
Marsh Wren ** 8/19 9/27 10/30 11/21 -
Red-necked Grebe * 8/26 10/20 11/6 11/22 -
Eared Grebe *** 8/30 9/29 11/9 11/29 12/11
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
American Coot *** 9/5 10/13 11/17 12/5 -
American Robin * 9/6 12/2 12/23 - -
Northern Flicker *** 9/6 9/27 10/20 11/5 11/20
Western Meadowlark *** 9/10 9/27 10/22 11/8 12/6
Golden-crowned Sparrow *** 9/12 9/27 10/21 10/30 11/7
Palm Warbler * 9/13 9/27 10/18 11/5 11/29
Varied Thrush ** 9/14 9/29 After Dec 31 - -
Golden-crowned Kinglet ** 9/14 10/3 10/26 11/11 11/21
Magnolia Warbler * 9/15 9/26 10/10 10/26 11/6
Ruby-crowned Kinglet ****! 9/15 10/3 12/16 - -
Western Grebe *** 9/15 10/14 11/5 11/24 12/9
Chestnut-collared Longspur * 9/17 10/3 10/25 11/12 11/30
White-throated Sparrow ** 9/17 10/3 10/25 - -
Black-throated Blue Warbler * 9/18 9/28 10/12 10/26 11/6
Cackling Goose ** 9/18 10/5 11/22 12/7 12/19
Harris's Sparrow * 9/18 10/14 After Dec 31 - -
Red-throated Pipit * 9/19 10/2 10/19 11/6 11/19
Ruddy Duck *** 9/19 10/13 11/14 - -
White-winged Scoter * 9/20 10/22 11/10 11/26 12/7
Dark-eyed Junco *** 9/21 10/9 12/16 After Dec 31 -
Hermit Thrush *** 9/21 10/5 10/28 11/7 11/15
Horned Grebe *** 9/21 10/18 11/11 11/26 12/6
Dunlin ** 9/22 10/11 11/6 11/24 12/8
Herring Gull ** 9/22 10/24 11/26 12/11 After Dec 31
Ring-necked Duck *** 9/24 10/17 12/7 - -
Bald Eagle ** 9/28 10/22 After Dec 31 - -
Eurasian Wigeon * 9/28 10/24 After Dec 31 - -
Surf Scoter ** 9/28 10/21 11/12 - -
Swamp Sparrow * 9/29 10/14 12/17 - -
Northern Shrike * 9/30 10/14 12/13 - -
Common Merganser * 10/1 11/1 12/15 - -
Canada Goose NA 10/1 11/1 11/25 - -
Ferruginous Hawk * 10/2 10/31 After Dec 31 - -

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
California Gull * Before July 1 14-Jul 9-Nov 26-Nov 10-Dec
Black-bellied Plover * Before July 1 23-Jul 8-Oct - -
Black-throated Gray Warbler * 30-Jul 13-Aug 30-Sep 22-Oct 4-Nov
Green-winged Teal ** 7-Aug 20-Aug 21-Nov - -
Northern Shoveler *** 5-Aug 20-Aug 22-Nov - -
Blue-winged Teal * 6-Aug 21-Aug 28-Sep 24-Oct 8-Nov
Northern Pintail ** 9-Aug 22-Aug 19-Nov - -
Black-and-white Warbler * 10-Aug 27-Aug 5-Oct 31-Oct 17-Nov
Savannah Sparrow *** 13-Aug 29-Aug 27-Sep 21-Oct 9-Nov
Townsend's Warbler *** 12-Aug 30-Aug 30-Sep 27-Oct 10-Nov
Belted Kingfisher ** 15-Aug 5-Sep 27-Oct 10-Nov -
Red-shouldered Hawk ** 19-Aug 6-Sep 3-Oct 23-Oct -
Cooper's Hawk ** 1-Aug 7-Sep 1-Oct 2-Nov 19-Nov
Blackburnian Warbler * 25-Aug 8-Sep 28-Sep 17-Oct 7-Nov
Brewer's Blackbird ** 23-Aug 8-Sep 28-Sep 16-Oct 10-Nov
Sharp-shinned Hawk * 23-Aug 9-Sep 22-Oct 8-Nov -
Red-winged Blackbird ** 24-Aug 11-Sep 10-Oct 31-Oct 21-Nov
Red-tailed Hawk *** 18-Aug 12-Sep After Dec 31 - -
Broad-winged Hawk * 2-Sep 12-Sep 27-Sep 13-Oct 24-Oct
Lincoln's Sparrow *** 30-Aug 13-Sep 5-Oct 22-Oct 8-Nov
Merlin * 29-Aug 13-Sep 22-Dec - -
Say's Phoebe *** 30-Aug 13-Sep 1-Oct - -
American Pipit ** 30-Aug 14-Sep 7-Nov - -
Prothonotary Warbler * 28-Aug 18-Sep 4-Oct 21-Oct 1-Nov
Yellow-green Vireo * 7-Sep 19-Sep 5-Oct 22-Oct 2-Nov
White-crowned Sparrow ****! 4-Sep 20-Sep 14-Oct 26-Oct 6-Nov
Greater White-fronted Goose ** 8-Sep 21-Sep 8-Oct - -
Red-naped Sapsucker * 8-Sep 22-Sep 9-Oct 24-Oct 4-Nov
Fox Sparrow *** 9-Sep 24-Sep 19-Oct - -
Sandhill Crane * 12-Sep 24-Sep 18-Nov 3-Dec 12-Dec
Sharp-tailed Sandpiper * 12-Sep 24-Sep 8-Oct 24-Oct 4-Nov
Magnolia Warbler * 15-Sep 26-Sep 10-Oct 26-Oct 6-Nov
Yellow-rumped Warbler ****! 2-Sep 26-Sep 17-Oct 29-Oct 8-Nov
Marsh Wren * 19-Aug 27-Sep 30-Oct 21-Nov -
Golden-crowned Sparrow *** 12-Sep 27-Sep 21-Oct 30-Oct 7-Nov
Northern Flicker *** 6-Sep 27-Sep 20-Oct 5-Nov 20-Nov
Palm Warbler * 13-Sep 27-Sep 18-Oct 5-Nov 29-Nov
Western Meadowlark ** 10-Sep 27-Sep 22-Oct 8-Nov 6-Dec
Black-throated Blue Warbler * 18-Sep 28-Sep 12-Oct 26-Oct 6-Nov
Varied Thrush ** 14-Sep 29-Sep After Dec 31 - -
Eared Grebe *** 30-Aug 29-Sep 9-Nov 29-Nov 11-Dec
Red-throated Pipit * 19-Sep 2-Oct 19-Oct 6-Nov 19-Nov

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Summer Tanager * - - 27-Jul 3-Oct 15-Oct
Bell's Vireo * - Before July 1 28-Jul 26-Sep 12-Oct
Whimbrel * Before July 1 10-Jul 5-Aug 3-Oct -
Western Wood-Pewee *** - - 7-Aug 26-Sep 12-Oct
Swainson's Hawk ** - 26-Jul 14-Aug 27-Sep 13-Oct
Barn Swallow *** - Before July 1 23-Aug 25-Sep 12-Oct
White-faced Ibis ** Before July 1 4-Jul 26-Aug 25-Sep 16-Oct
American Avocet * - Before July 1 31-Aug 28-Sep 20-Oct
American White Pelican * Before July 1 17-Aug 1-Sep 26-Sep 11-Dec
Red-breasted Nuthatch * 29-Jul 10-Aug 2-Sep 28-Oct 14-Nov
Franklin's Gull * Before July 1 1-Jul 3-Sep 3-Oct 1-Nov
Cinnamon Teal * 31-Jul 16-Aug 5-Sep 28-Sep 14-Oct
Gray Flycatcher * 9-Aug 22-Aug 5-Sep 25-Sep 7-Oct
Cassin's Vireo * 11-Aug 22-Aug 6-Sep 25-Sep 8-Oct
Western Tanager *** 15-Aug 25-Aug 7-Sep 28-Sep 12-Oct
Brewer's Sparrow ** 6-Aug 21-Aug 8-Sep 28-Sep 11-Oct
Chipping Sparrow ** 7-Aug 20-Aug 8-Sep 11-Oct 5-Nov
Killdeer ** 4-Aug 19-Aug 8-Sep 30-Sep 20-Nov
Wilson's Warbler *** 8-Aug 22-Aug 8-Sep 28-Sep 12-Oct
Yellow Warbler *** 5-Aug 19-Aug 8-Sep 3-Oct 21-Oct
House Wren ** 14-Aug 24-Aug 9-Sep 29-Sep 8-Nov
Warbling Vireo *** 14-Aug 25-Aug 9-Sep 29-Sep 13-Oct
Blue-gray Gnatcatcher * 9-Aug 24-Aug 12-Sep 30-Sep 13-Oct
Pacific-slope Flycatcher *** 19-Aug 28-Aug 12-Sep 4-Oct 20-Oct
Black Turnstone * 3-Jul 19-Jul 14-Sep 26-Nov 7-Dec
Green-tailed Towhee ** 21-Aug 1-Sep 14-Sep 1-Oct 12-Oct
Turkey Vulture *** 23-Aug 3-Sep 14-Sep 6-Oct 19-Oct
Elegant Tern * Before July 1 21-Jul 15-Sep 5-Oct 26-Nov
Vesper Sparrow ** 17-Aug 30-Aug 15-Sep 3-Oct 17-Oct
Heermann's Gull * - Before July 1 16-Sep 7-Oct 1-Dec
Common Tern * 19-Aug 1-Sep 16-Sep 3-Oct 16-Oct
Common Yellowthroat *** 17-Aug 29-Aug 16-Sep 9-Oct 28-Oct
Vaux's Swift ** 26-Aug 5-Sep 16-Sep 7-Oct 21-Oct
Clay-colored Sparrow * 14-Aug 28-Aug 17-Sep 6-Oct 2-Nov
Red-throated Loon * 25-Aug 5-Sep 20-Sep 28-Sep 2-Oct
Pectoral Sandpiper ** 17-Aug 1-Sep 20-Sep 11-Oct 28-Oct
Bobolink * 25-Aug 6-Sep 22-Sep 8-Oct 21-Oct
Mountain Bluebird * 6-Sep 12-Sep 22-Sep 15-Oct 29-Oct
Orange-crowned Warbler *** 12-Aug 2-Sep 22-Sep 12-Oct 29-Oct
Broad-winged Hawk * 2-Sep 12-Sep 27-Sep 13-Oct 24-Oct
Savannah Sparrow ** 13-Aug 29-Aug 27-Sep 21-Oct 9-Nov
Brewer's Blackbird ** 23-Aug 8-Sep 28-Sep 16-Oct 10-Nov
Black-throated Gray Warbler ** 30-Jul 13-Aug 30-Sep 22-Oct 4-Nov
Townsend's Warbler ** 12-Aug 30-Aug 30-Sep 27-Oct 10-Nov
Cooper's Hawk * 1-Aug 7-Sep 1-Oct 2-Nov 19-Nov

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Black Swift * - - Before July 1 3-Jul 25-Sep
Violet-green Swallow ** - - Before July 1 26-Jul 15-Oct
Lucy's Warbler * - - Before July 1 27-Jul 16-Oct
Yellow-breasted Chat * - - Before July 1 28-Jul 29-Sep
Indigo Bunting * - Before July 1 21-Jul 11-Aug 2-Oct
Black-headed Grosbeak *** - - Before July 1 2-Sep 30-Sep
Broad-tailed Hummingbird *** - Before July 1 28-Jul 3-Sep 26-Sep
Mississippi Kite * - Before July 1 4-Aug 6-Sep 1-Oct
Hermit Warbler * 28-Jul 6-Aug 22-Aug 7-Sep 26-Oct
Ruddy Turnstone * Before July 1 13-Jul 21-Aug 8-Sep 5-Dec
Rufous Hummingbird *** Before July 1 1-Jul 1-Aug 8-Sep 25-Sep
Lark Bunting * 25-Jul 4-Aug 21-Aug 9-Sep 26-Sep
Northern Rough-winged Swallow ** - - Before July 1 10-Sep 27-Sep
Western Kingbird *** - - 13-Jul 10-Sep 26-Sep
Wilson's Phalarope ** Before July 1 13-Jul 11-Aug 11-Sep 3-Oct
Bank Swallow ** - Before July 1 18-Aug 12-Sep 28-Sep
Black-chinned Hummingbird *** Before July 1 16-Jul 9-Aug 13-Sep 4-Oct
Least Sandpiper *** Before July 1 15-Jul 28-Aug 13-Sep 25-Sep
Greater Yellowlegs * Before July 1 10-Jul 30-Aug 14-Sep 11-Dec
Lesser Yellowlegs * Before July 1 9-Aug 26-Aug 14-Sep 20-Oct
Semipalmated Plover *** Before July 1 13-Jul 26-Aug 14-Sep 28-Sep
Solitary Sandpiper ** 25-Jul 11-Aug 26-Aug 14-Sep 27-Sep
Baird's Sandpiper ** 30-Jul 13-Aug 29-Aug 15-Sep 29-Sep
Red-headed Woodpecker * 8-Aug 18-Aug 31-Aug 15-Sep 26-Sep
Stilt Sandpiper * Before July 1 17-Jul 31-Aug 15-Sep 27-Sep
Western Sandpiper *** Before July 1 8-Jul 29-Aug 15-Sep 6-Oct
Blue Grosbeak ** Before July 1 1-Jul 31-Jul 16-Sep 12-Oct
Buff-breasted Sandpiper * 9-Aug 19-Aug 2-Sep 16-Sep 26-Sep
Osprey ** 4-Aug 14-Aug 26-Aug 16-Sep 18-Oct
Lazuli Bunting ** 5-Aug 11-Aug 20-Aug 17-Sep 10-Oct
Red-eyed Vireo * 11-Aug 19-Aug 30-Aug 17-Sep 29-Sep
Black-necked Stilt ** Before July 1 1-Jul 22-Aug 18-Sep 7-Oct
Gray Catbird ** 10-Aug 19-Aug 31-Aug 19-Sep 2-Oct
Lark Sparrow ** 21-Jul 1-Aug 19-Aug 19-Sep 5-Oct
Northern Waterthrush * 9-Aug 20-Aug 4-Sep 19-Sep 3-Oct
Olive-sided Flycatcher ** - - Before July 1 19-Sep 3-Oct
Red-necked Phalarope *** 2-Aug 16-Aug 1-Sep 19-Sep 5-Oct
Spotted Sandpiper *** Before July 1 3-Jul 21-Aug 19-Sep 4-Oct
Mourning Dove *** - Before July 1 17-Aug 22-Sep 8-Oct
Plumbeous Vireo * - - 15-Jul 22-Sep 6-Oct
Green Heron * - Before July 1 30-Aug 23-Sep 18-Oct
MacGillivray's Warbler *** 8-Aug 19-Aug 4-Sep 23-Sep 7-Oct
Nashville Warbler ** 2-Aug 16-Aug 4-Sep 23-Sep 12-Oct
Willow Flycatcher *** 9-Aug 20-Aug 3-Sep 23-Sep 7-Oct
Black Tern * Before July 1 24-Jul 15-Aug 24-Sep 8-Oct
Hammond's Flycatcher * 13-Aug 22-Aug 6-Sep 24-Sep 7-Oct
Least Flycatcher * 11-Aug 21-Aug 6-Sep 24-Sep 8-Oct
Sage Thrasher * - - 29-Aug 24-Sep 20-Oct
Swainson's Thrush ** 19-Aug 26-Aug 8-Sep 24-Sep 10-Oct
Wandering Tattler * Before July 1 20-Jul 24-Aug 24-Sep 16-Oct
Yellow-headed Blackbird ** 12-Aug 21-Aug 2-Sep 24-Sep 11-Oct
Barn Swallow *** - Before July 1 23-Aug 25-Sep 12-Oct
Cassin's Vireo ** 11-Aug 22-Aug 6-Sep 25-Sep 8-Oct
Gray Flycatcher * 9-Aug 22-Aug 5-Sep 25-Sep 7-Oct
White-faced Ibis ** Before July 1 4-Jul 26-Aug 25-Sep 16-Oct
American White Pelican * Before July 1 17-Aug 1-Sep 26-Sep 11-Dec
Bell's Vireo * - Before July 1 28-Jul 26-Sep 12-Oct
Western Wood-Pewee *** - - 7-Aug 26-Sep 12-Oct
Swainson's Hawk ** - 26-Jul 14-Aug 27-Sep 13-Oct
American Avocet * - Before July 1 31-Aug 28-Sep 20-Oct
Cinnamon Teal * 31-Jul 16-Aug 5-Sep 28-Sep 14-Oct
Red-throated Loon * 25-Aug 5-Sep 20-Sep 28-Sep 2-Oct
Brewer's Sparrow ** 6-Aug 21-Aug 8-Sep 28-Sep 11-Oct
Western Tanager *** 15-Aug 25-Aug 7-Sep 28-Sep 12-Oct
Wilson's Warbler *** 8-Aug 22-Aug 8-Sep 28-Sep 12-Oct
House Wren ** 14-Aug 24-Aug 9-Sep 29-Sep 8-Nov
Warbling Vireo *** 14-Aug 25-Aug 9-Sep 29-Sep 13-Oct
Blue-gray Gnatcatcher * 9-Aug 24-Aug 12-Sep 30-Sep 13-Oct
Killdeer ** 4-Aug 19-Aug 8-Sep 30-Sep 20-Nov
Green-tailed Towhee ** 21-Aug 1-Sep 14-Sep 1-Oct 12-Oct

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Farnsworth and Van Doren

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