Regional Migration Forecast: 14-21 April 2017

Common Nighthawk. Shawn Billerman/Macaulay Library. eBird S14402581.

Continental Summary

Scattered favorable conditions primary in the middle of the forecast period will see light to moderate flights of Green Heron, Western Sandpiper, Red-necked Phalarope, Olive-sided Flycatcher, Hammond’s Flycatcher, Warbling Vireo, and Townsend’s Warbler for the West, while widespread favorable migration bring moderate to heavy flights in many areas of the East and will feature Sora, Least Sandpiper, Semipalmated Sandpiper, Common Nighthawk, Blue-headed Vireo, Kentucky Warbler, Summer Tanager, and Painted Bunting. Continued unfavorable conditions in many areas of northern Central America will slow the typical seasonal pulses of trans-Gulf migration.

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 red will experience conditions that are favorable for migration, and areas where red 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!

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.

Finally, and new for Spring 2017, our friend Kyle Horton of the Radar Aeroecology Lab at Oklahoma University created a new set of images depicting spring bird movements in the Gulf of Mexico region as part of an analysis that he is leading as part of our ongoing collaboration. This feature appears in the Gulf Coast and Southeast region forecast.

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

Favorable migration conditions arrive in the region to begin the weekend, and moderate to heavy flights will follow. By Sunday night a disturbance passing through the region shuts down most movements, but a new set of favorable conditions arrives on Tuesday for continued flights of similar intensity and extents. The remainder of the period will see continued flights, but increasing chances for precipitation as a frontal boundary slowly builds and moves across northern reaches of the region by Wednesday and Thursday. Note, precipitation is forecast to overlap with bird movements on several nights and in numerous locations, so birders should be watchful for local concentrations and fallouts where these two features overlap.

Summer Tanager. Dan Lory/Macaulay Library. eBird S35862351.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Black-crowned Night-Heron * 3/27 5/8 5/20 5/29 6/1
Lesser Yellowlegs *** 3/28 4/14 5/4 5/18 5/26
Northern Rough-winged Swallow *** 3/31 4/16 5/1 5/20 5/29
Palm Warbler *** 4/3 4/25 5/4 5/19 5/23
Eastern Towhee ****! 4/3 4/15 5/2 5/9 5/16
Barn Swallow ****! 4/5 4/24 5/19 5/29 6/6
Blue-gray Gnatcatcher ****! 4/5 4/16 5/4 5/11 5/29
Yellow-rumped Warbler ****! 4/8 4/24 5/5 5/18 5/23
White-throated Sparrow ****! 4/8 4/17 4/28 5/9 5/18
Broad-winged Hawk *** 4/9 4/14 4/26 5/6 5/10
Sora *** 4/11 4/20 5/8 5/20 5/29
White-eyed Vireo *** 4/11 4/23 5/4 5/13 5/21
Prothonotary Warbler *** 4/12 4/20 5/11 5/17 5/22
Green Heron *** 4/16 4/26 5/9 5/14 6/2
Cliff Swallow *** 4/16 4/25 5/17 5/27 5/31
Blue-headed Vireo *** 4/18 4/26 5/5 5/14 5/21
Bank Swallow *** 4/18 4/27 5/16 5/27 6/5
House Wren ****! 4/18 4/29 5/10 5/15 5/26
Chimney Swift ****! 4/19 4/27 5/19 6/4 6/18
Grasshopper Sparrow ** 4/19 4/30 6/10 After Jun 30 -
Red-headed Woodpecker *** 4/20 4/29 5/8 5/13 6/18
Kentucky Warbler *** 4/20 4/25 5/9 6/28 After Jun 30
Summer Tanager *** 4/20 4/27 5/8 5/18 5/22

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Red-winged Blackbird *** 3/2 3/9 5/6 5/28 6/25
Common Grackle *** 3/4 3/10 5/19 6/24 After Jun 30
Great Blue Heron *** 3/9 3/22 5/12 5/30 6/7
Pectoral Sandpiper * 3/20 3/29 4/18 5/23 6/5
Blue-winged Teal *** 3/14 3/31 4/19 4/30 5/10
Great Egret *** 3/23 3/31 5/12 5/29 6/3
Double-crested Cormorant *** 3/19 4/1 4/20 5/30 6/7
Osprey *** 3/15 4/1 4/20 5/1 5/8
Tree Swallow *** 3/28 4/1 5/7 6/24 6/26
Cooper's Hawk * 3/15 4/6 4/26 5/11 5/25
Hermit Thrush *** 4/2 4/6 4/19 5/7 5/11
Louisiana Waterthrush ** 3/29 4/6 4/30 5/14 6/17
Vesper Sparrow * 3/28 4/6 6/11 6/19 6/22
Brown-headed Cowbird *** 3/11 4/6 5/3 5/11 After Jun 30
Belted Kingfisher *** 3/28 4/7 4/16 5/6 5/12
Northern Flicker ****! 3/30 4/8 4/18 5/9 5/15
Yellow-throated Warbler ** 4/1 4/8 4/26 5/2 5/19
Caspian Tern ** 4/1 4/9 4/28 5/20 6/4
Pine Warbler *** 3/31 4/9 4/24 5/8 5/15
Field Sparrow *** 3/30 4/9 4/28 5/9 6/18
Sharp-shinned Hawk * 3/27 4/10 4/26 5/7 5/17
Purple Martin ** 3/29 4/11 5/17 6/1 6/8
Ruby-crowned Kinglet ****! 4/6 4/11 4/24 5/8 5/13
Brown Thrasher *** 4/4 4/11 5/1 5/9 5/13
Chipping Sparrow ****! 4/1 4/11 5/3 5/10 5/14
Swamp Sparrow *** 4/3 4/11 5/2 5/9 5/25
Forster's Tern ** 4/1 4/12 5/10 5/22 6/4
Greater Yellowlegs *** 3/25 4/13 4/26 5/19 5/29
Savannah Sparrow *** 4/4 4/13 5/6 5/24 6/21
Purple Finch *** 4/1 4/13 4/25 5/4 5/11
Broad-winged Hawk *** 4/9 4/14 4/26 5/6 5/10
Lesser Yellowlegs *** 3/28 4/14 5/4 5/18 5/26
Eastern Towhee *** 4/3 4/15 5/2 5/9 5/16
Northern Rough-winged Swallow *** 3/31 4/16 5/1 5/20 5/29
Blue-gray Gnatcatcher ****! 4/5 4/16 5/4 5/11 5/29
White-throated Sparrow ****! 4/8 4/17 4/28 5/9 5/18
Sora ** 4/11 4/20 5/8 5/20 5/29
Prothonotary Warbler ** 4/12 4/20 5/11 5/17 5/22

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
American Tree Sparrow *** - - Before Mar 1 4/16 5/3
Common Redpoll * - - Before Mar 1 4/17 5/3
Bald Eagle * 3/5 3/7 3/10 5/28 6/7
Horned Grebe ** 3/2 3/12 3/25 4/15 5/9
Bufflehead *** 3/2 3/9 3/30 4/17 5/9
Ruddy Duck ** 3/2 3/10 4/1 4/29 5/8
Green-winged Teal *** 3/2 3/10 4/2 4/30 5/11
Northern Shoveler *** 3/2 3/9 4/3 4/28 5/8
American Coot *** 3/2 3/7 4/4 4/29 5/21
Dark-eyed Junco *** 3/12 3/14 4/5 4/24 5/2
Northern Harrier ** 3/18 3/28 4/6 4/28 5/9
Fox Sparrow *** 3/10 3/12 4/6 4/20 4/27
Golden-crowned Kinglet *** 3/30 4/3 4/9 4/16 4/24
Rusty Blackbird ** 3/7 3/11 4/9 5/4 5/11
Pied-billed Grebe *** 3/8 3/20 4/10 4/28 5/7
American Kestrel *** 3/17 3/27 4/10 4/29 5/9
Eastern Phoebe *** 3/12 4/1 4/10 4/14 6/2
Brown Creeper *** 3/29 4/3 4/10 4/23 5/8
Song Sparrow ** 3/7 3/13 4/10 5/10 6/24
Bonaparte's Gull ** 3/15 4/1 4/11 4/20 5/5
Common Loon *** 3/17 3/26 4/12 4/22 6/4
Wilson's Snipe *** 3/10 4/4 4/13 4/29 5/10
Yellow-bellied Sapsucker *** 3/29 4/3 4/13 4/23 4/27
Winter Wren ** 3/29 4/4 4/13 4/23 5/11
Belted Kingfisher *** 3/28 4/7 4/16 5/6 5/12
Pectoral Sandpiper * 3/20 3/29 4/18 5/23 6/5
Northern Flicker *** 3/30 4/8 4/18 5/9 5/15
Blue-winged Teal *** 3/14 3/31 4/19 4/30 5/10
Hermit Thrush *** 4/2 4/6 4/19 5/7 5/11
Double-crested Cormorant *** 3/19 4/1 4/20 5/30 6/7
Osprey *** 3/15 4/1 4/20 5/1 5/8

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Rough-legged Hawk * - - Before Mar 1 3/3 4/15
Horned Lark * - - Before Mar 1 3/15 After Jun 30
American Woodcock * 3/5 3/10 3/16 3/22 5/30
Redhead ** 3/2 3/3 3/11 4/1 4/30
Common Goldeneye *** 3/2 3/3 3/5 4/2 4/17
Canvasback ** 3/2 3/3 3/10 4/3 4/20
Northern Pintail *** 3/2 3/6 3/11 4/5 4/15
Tundra Swan ** 3/2 3/6 3/13 4/8 4/16
Gadwall *** 3/2 3/9 3/20 4/8 5/4
Greater Scaup ** - - Before Mar 1 4/8 5/2
Hooded Merganser *** 3/2 3/9 3/23 4/8 4/16
Ring-billed Gull *** 3/2 3/6 3/12 4/8 4/28
American Wigeon *** 3/2 3/8 3/18 4/9 4/25
Common Merganser *** 3/2 3/4 3/10 4/9 4/23
Killdeer * 3/2 3/8 4/1 4/9 6/5
American Black Duck *** - - Before Mar 1 4/10 4/24
Ring-necked Duck *** 3/2 3/10 3/21 4/10 4/29
Lesser Scaup *** 3/2 3/6 3/25 4/10 5/8
Red-breasted Merganser *** 3/2 3/6 3/21 4/12 5/11
Eastern Phoebe *** 3/12 4/1 4/10 4/14 6/2
Horned Grebe *** 3/2 3/12 3/25 4/15 5/9
Golden-crowned Kinglet *** 3/30 4/3 4/9 4/16 4/24
American Tree Sparrow *** - - Before Mar 1 4/16 5/3
Bufflehead *** 3/2 3/9 3/30 4/17 5/9
Common Redpoll * - - Before Mar 1 4/17 5/3
Bonaparte's Gull *** 3/15 4/1 4/11 4/20 5/5
Fox Sparrow *** 3/10 3/12 4/6 4/20 4/27

Gulf Coast and Southeast

Moderate to heavy flights are likely in many areas of the region during the period. Note that precipitation is forecast in several areas, including inland to in Texas, to the north of the Gulf Coast, and in Florida to end the period. Note also that conditions for migration in northern Central America and northern South America continue to be largely marginal and unfavorable for mass exodus across the Gulf of Mexico and over the Caribbean Sea. The best opportunities for trans-Gulf movements will likely be earlier in the period. Regardless, given these conditions, migration intensities are likely to continue to be below average in many areas.

Painted Bunting. George Duriaux/Macaulay Library. eBird S35702300.

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Black-and-white Warbler *** 3/7 4/17 4/27 5/7 5/17
Stilt Sandpiper * 3/16 4/14 4/30 5/19 5/26
White-faced Ibis * 3/23 4/14 4/25 5/3 5/8
Great Crested Flycatcher ****! 3/28 4/20 5/8 6/9 After Jun 30
Semipalmated Sandpiper ** 3/29 4/18 5/14 5/31 6/9
Brown-crested Flycatcher ** 3/31 4/17 4/23 5/31 6/4
Bank Swallow ** 3/31 4/18 5/2 5/19 5/26
Solitary Sandpiper *** 4/1 4/15 4/26 5/9 5/19
Red-eyed Vireo ****! 4/1 4/15 5/12 5/24 After Jun 30
Kentucky Warbler *** 4/3 4/14 4/21 After Jun 30 -
Summer Tanager ****! 4/3 4/15 4/25 4/30 5/17
Indigo Bunting ****! 4/3 4/16 4/27 5/10 6/23
Bell's Vireo ** 4/5 4/17 4/28 6/1 6/9
Common Yellowthroat *** 4/5 4/15 5/2 5/16 5/24
Bullock's Oriole * 4/5 4/17 5/24 5/31 After Jun 30
Western Kingbird *** 4/7 4/20 5/10 5/30 6/2
Blue Grosbeak ****! 4/7 4/17 4/27 6/21 6/24
Least Bittern ** 4/8 4/14 4/24 5/3 5/9
Semipalmated Plover *** 4/8 4/15 4/25 5/29 6/6
Ruddy Turnstone *** 4/8 4/14 4/23 5/24 5/31
Black-bellied Plover ** 4/9 4/14 4/24 5/20 5/28
Black-throated Green Warbler *** 4/9 4/14 4/29 5/15 5/22
Tennessee Warbler *** 4/10 4/14 4/27 5/15 5/19
Baltimore Oriole ****! 4/10 4/14 4/27 5/5 5/19
Yellow-billed Cuckoo *** 4/11 5/9 6/6 6/12 After Jun 30
Common Nighthawk *** 4/11 4/20 5/14 6/13 After Jun 30
Ovenbird *** 4/11 4/17 4/29 5/9 After Jun 30
Yellow-breasted Chat *** 4/11 4/18 6/7 6/24 After Jun 30
Scarlet Tanager ****! 4/11 4/16 4/24 5/7 5/12
Painted Bunting ****! 4/11 4/21 4/29 After Jun 30 -
Spotted Sandpiper *** 4/12 4/22 5/5 5/20 5/26
Wood Thrush ****! 4/12 4/17 4/26 5/8 6/20
Gray Catbird ****! 4/12 4/17 4/27 5/8 5/17
Northern Waterthrush *** 4/12 4/16 4/28 5/15 5/21
Clay-colored Sparrow *** 4/12 4/23 4/29 5/11 5/17
White-crowned Sparrow ** 4/12 4/18 4/25 5/7 5/14
Rose-breasted Grosbeak ****! 4/12 4/17 4/28 5/5 5/16
Least Sandpiper *** 4/13 4/22 5/2 5/18 5/24
Acadian Flycatcher *** 4/13 4/23 6/5 6/16 After Jun 30
Swainson's Thrush ****! 4/13 4/17 5/4 5/17 5/23
Golden-winged Warbler ** 4/13 4/24 4/29 5/5 5/15
American Redstart *** 4/13 4/29 5/10 5/16 5/23
Blackburnian Warbler *** 4/13 4/26 5/11 5/16 5/21
Canada Warbler ** 4/13 5/7 5/13 5/20 5/25
Wilson's Phalarope *** 4/14 4/21 5/4 5/18 5/26
Eastern Wood-Pewee *** 4/14 4/24 5/12 5/22 5/26
Yellow Warbler *** 4/14 4/25 5/1 5/17 5/22
Veery *** 4/15 4/20 5/2 5/8 5/20
Gray-cheeked Thrush *** 4/15 4/20 4/26 5/16 5/21
Blackpoll Warbler ****! 4/15 4/19 5/4 5/11 5/22
Mississippi Kite *** 4/17 4/24 5/7 5/22 5/26
Dickcissel ****! 4/18 4/23 5/1 5/21 5/26
Bobolink *** 4/18 4/25 5/4 5/8 5/21
Olive-sided Flycatcher ** 4/20 5/8 5/12 5/17 6/2
Wilson's Warbler *** 4/20 4/30 5/11 5/19 5/23
White-rumped Sandpiper ** 4/21 4/30 5/14 5/20 6/13
Magnolia Warbler ****! 4/21 4/26 5/11 5/16 5/20

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Brown Pelican * - 3/2 4/17 4/30 5/6
Western Sandpiper * 3/2 3/7 4/14 5/22 5/31
Lincoln's Sparrow ** 3/2 3/7 4/16 5/8 5/17
Northern Parula *** 3/2 3/15 4/18 5/10 6/25
Black-bellied Whistling-Duck ** 3/8 3/17 4/24 5/2 5/7
Black-necked Stilt *** 3/9 3/17 4/21 5/2 5/9
Black-chinned Hummingbird ** 3/2 3/17 5/4 5/24 6/2
Brown-headed Cowbird *** 3/7 3/18 4/29 5/23 After Jun 30
White-eyed Vireo *** 3/6 3/22 4/15 6/13 6/26
Northern Rough-winged Swallow ** 3/2 3/22 5/1 5/12 After Jun 30
Purple Martin ** 3/16 3/22 6/22 After Jun 30 -
Barn Swallow *** 3/10 3/22 5/2 5/19 5/27
Pectoral Sandpiper * 3/2 3/23 4/28 5/18 5/28
Yellow-throated Vireo *** 3/13 3/24 4/22 After Jun 30 -
Hooded Warbler *** 3/17 3/24 4/19 4/29 5/10
Scissor-tailed Flycatcher *** 3/16 3/26 5/12 5/30 After Jun 30
House Wren * 3/18 3/27 4/14 4/26 5/18
Swainson's Hawk ** 3/17 3/29 4/18 5/6 6/1
Baird's Sandpiper * 3/9 3/29 5/3 5/19 5/28
Chimney Swift *** 3/23 4/2 5/11 5/25 5/29
Prairie Warbler *** 3/22 4/3 4/18 4/26 6/18
Cliff Swallow *** 3/12 4/4 5/12 5/20 6/17
Blue-winged Warbler *** 4/1 4/4 4/19 4/29 5/4
Cattle Egret *** 3/18 4/5 4/21 5/2 5/8
Franklin's Gull ** 3/28 4/5 4/19 5/2 5/23
Worm-eating Warbler *** 4/3 4/5 4/19 4/29 5/2
Prothonotary Warbler *** 3/25 4/5 4/18 4/22 6/26
Royal Tern ** 3/2 4/6 4/19 4/30 5/6
Ruby-throated Hummingbird *** 3/15 4/6 4/26 5/17 5/23
Ash-throated Flycatcher * 3/15 4/6 5/24 5/31 6/3
Lark Sparrow ** 3/16 4/6 5/1 5/29 After Jun 30
Eastern Kingbird *** 3/27 4/8 4/29 5/18 5/24
Yellow-crowned Night-Heron * 3/2 4/9 5/1 5/16 5/20
Sora ** 3/7 4/9 4/22 5/1 5/15
Green Heron *** 3/26 4/10 4/28 5/18 5/22
American Avocet * 3/19 4/10 4/19 5/5 5/11
Gull-billed Tern * 3/15 4/10 4/18 5/2 5/8
Chuck-will's-widow ** 3/29 4/10 4/24 6/25 After Jun 30
Whimbrel ** 4/5 4/11 4/25 5/4 6/1
Willet ** 3/8 4/12 4/19 4/30 5/7
Laughing Gull *** 3/2 4/12 4/20 5/1 5/7
Least Tern *** 3/27 4/12 4/23 4/30 5/6
Fulvous Whistling-Duck * 4/1 4/13 4/24 5/3 5/9
Sanderling * 3/30 4/13 4/19 5/30 6/7
Dunlin * 4/9 4/13 4/23 5/25 6/3
Short-billed Dowitcher * 3/13 4/13 4/20 5/4 5/21
Long-billed Dowitcher * 3/2 4/13 4/23 5/5 5/15
Lesser Yellowlegs *** 3/7 4/13 4/25 5/7 5/24
Caspian Tern * 3/17 4/13 4/19 5/2 5/8
Sandwich Tern * 3/15 4/13 4/19 4/30 5/7
Warbling Vireo ** 4/5 4/13 5/2 5/17 5/23
Sedge Wren * 4/9 4/13 4/18 4/29 5/5
Marsh Wren ** 3/6 4/13 4/19 4/30 5/8
Nashville Warbler *** 4/5 4/13 4/26 5/8 5/19
Cerulean Warbler ** 4/3 4/13 4/20 4/30 5/5
Bronzed Cowbird ** 4/2 4/13 4/27 5/31 6/4
Orchard Oriole *** 3/31 4/13 4/26 5/17 6/19
Least Bittern ** 4/8 4/14 4/24 5/3 5/9
White-faced Ibis ** 3/23 4/14 4/25 5/3 5/8
Black-bellied Plover ** 4/9 4/14 4/24 5/20 5/28
Ruddy Turnstone ** 4/8 4/14 4/23 5/24 5/31
Stilt Sandpiper * 3/16 4/14 4/30 5/19 5/26
Tennessee Warbler *** 4/10 4/14 4/27 5/15 5/19
Kentucky Warbler *** 4/3 4/14 4/21 After Jun 30 -
Black-throated Green Warbler *** 4/9 4/14 4/29 5/15 5/22
Baltimore Oriole *** 4/10 4/14 4/27 5/5 5/19
Semipalmated Plover *** 4/8 4/15 4/25 5/29 6/6
Solitary Sandpiper *** 4/1 4/15 4/26 5/9 5/19
Red-eyed Vireo *** 4/1 4/15 5/12 5/24 After Jun 30
Common Yellowthroat *** 4/5 4/15 5/2 5/16 5/24
Summer Tanager ****! 4/3 4/15 4/25 4/30 5/17
Northern Waterthrush *** 4/12 4/16 4/28 5/15 5/21
Scarlet Tanager *** 4/11 4/16 4/24 5/7 5/12
Indigo Bunting ****! 4/3 4/16 4/27 5/10 6/23
Brown-crested Flycatcher ** 3/31 4/17 4/23 5/31 6/4
Bell's Vireo * 4/5 4/17 4/28 6/1 6/9
Swainson's Thrush *** 4/13 4/17 5/4 5/17 5/23
Wood Thrush *** 4/12 4/17 4/26 5/8 6/20
Gray Catbird ****! 4/12 4/17 4/27 5/8 5/17
Ovenbird *** 4/11 4/17 4/29 5/9 After Jun 30
Black-and-white Warbler *** 3/7 4/17 4/27 5/7 5/17
Rose-breasted Grosbeak ****! 4/12 4/17 4/28 5/5 5/16
Blue Grosbeak *** 4/7 4/17 4/27 6/21 6/24
Bullock's Oriole * 4/5 4/17 5/24 5/31 After Jun 30
Semipalmated Sandpiper ** 3/29 4/18 5/14 5/31 6/9
Bank Swallow * 3/31 4/18 5/2 5/19 5/26
Yellow-breasted Chat ** 4/11 4/18 6/7 6/24 After Jun 30
White-crowned Sparrow ** 4/12 4/18 4/25 5/7 5/14
Blackpoll Warbler *** 4/15 4/19 5/4 5/11 5/22
Common Nighthawk *** 4/11 4/20 5/14 6/13 After Jun 30
Great Crested Flycatcher *** 3/28 4/20 5/8 6/9 After Jun 30
Western Kingbird *** 4/7 4/20 5/10 5/30 6/2
Veery *** 4/15 4/20 5/2 5/8 5/20
Gray-cheeked Thrush *** 4/15 4/20 4/26 5/16 5/21
Wilson's Phalarope *** 4/14 4/21 5/4 5/18 5/26
Painted Bunting *** 4/11 4/21 4/29 After Jun 30 -

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Northern Shoveler ** - - Before Mar 1 4/28 5/21
Red-breasted Merganser * - - Before Mar 1 4/20 5/11
Northern Harrier *** - - Before Mar 1 4/26 5/8
Sharp-shinned Hawk * - - Before Mar 1 4/28 5/10
American Coot *** - - Before Mar 1 4/29 5/16
Herring Gull * - - Before Mar 1 4/28 5/6
Orange-crowned Warbler ** - - Before Mar 1 4/28 5/11
Palm Warbler *** - 3/2 3/6 5/5 5/12
Belted Kingfisher *** 3/5 3/6 3/7 4/15 4/29
Common Gallinule * - 3/2 3/9 5/1 5/9
Swamp Sparrow ** 3/2 3/6 3/10 4/28 5/6
Cooper's Hawk * 3/2 3/3 3/11 4/17 5/20
Savannah Sparrow *** 3/7 3/9 3/13 5/10 5/18
Osprey *** 3/2 3/7 3/14 4/27 5/3
Vesper Sparrow * 3/7 3/10 3/15 5/5 5/15
Long-billed Curlew * 3/2 3/11 3/16 4/29 5/12
Forster's Tern * 3/7 3/9 3/16 5/1 5/11
Spotted Towhee * 3/2 3/11 3/21 4/28 5/10
Ruby-crowned Kinglet *** 3/2 3/7 3/25 4/21 5/3
Couch's Kingbird * 3/2 3/12 3/27 5/1 5/30
Cedar Waxwing *** 3/2 3/20 3/27 5/22 5/28
American Golden-Plover * 3/2 3/22 3/29 5/1 5/13
Greater Yellowlegs ** 3/2 3/10 4/1 5/3 5/18
Chipping Sparrow *** 3/9 3/18 4/1 4/16 5/16
Louisiana Waterthrush * 3/14 3/22 4/2 5/24 6/13
Blue-winged Teal *** 3/2 3/22 4/4 5/1 5/23
Pine Siskin * 3/26 3/29 4/5 5/12 5/18
Blue-headed Vireo ** 3/2 3/3 4/8 5/10 5/26
Blue-gray Gnatcatcher *** 3/17 3/24 4/8 4/18 6/26
Yellow-throated Warbler ** 3/2 3/8 4/9 4/25 After Jun 30
White-throated Sparrow *** 3/16 4/7 4/11 4/29 5/9
Upland Sandpiper * 3/21 3/28 4/12 5/5 5/12
Broad-winged Hawk ** 3/19 3/26 4/13 4/24 5/26
Western Sandpiper * 3/2 3/7 4/14 5/22 5/31
House Wren ** 3/18 3/27 4/14 4/26 5/18
White-eyed Vireo ** 3/6 3/22 4/15 6/13 6/26
Lincoln's Sparrow *** 3/2 3/7 4/16 5/8 5/17
Brown Pelican *** - 3/2 4/17 4/30 5/6
Swainson's Hawk ** 3/17 3/29 4/18 5/6 6/1
Gull-billed Tern * 3/15 4/10 4/18 5/2 5/8
Sedge Wren ** 4/9 4/13 4/18 4/29 5/5
Prothonotary Warbler *** 3/25 4/5 4/18 4/22 6/26
Northern Parula *** 3/2 3/15 4/18 5/10 6/25
Prairie Warbler *** 3/22 4/3 4/18 4/26 6/18
American Avocet ** 3/19 4/10 4/19 5/5 5/11
Sanderling ** 3/30 4/13 4/19 5/30 6/7
Willet *** 3/8 4/12 4/19 4/30 5/7
Franklin's Gull * 3/28 4/5 4/19 5/2 5/23
Caspian Tern ** 3/17 4/13 4/19 5/2 5/8
Royal Tern *** 3/2 4/6 4/19 4/30 5/6
Sandwich Tern ** 3/15 4/13 4/19 4/30 5/7
Marsh Wren *** 3/6 4/13 4/19 4/30 5/8
Worm-eating Warbler *** 4/3 4/5 4/19 4/29 5/2
Blue-winged Warbler *** 4/1 4/4 4/19 4/29 5/4
Hooded Warbler *** 3/17 3/24 4/19 4/29 5/10
Short-billed Dowitcher ** 3/13 4/13 4/20 5/4 5/21
Laughing Gull *** 3/2 4/12 4/20 5/1 5/7
Cerulean Warbler ** 4/3 4/13 4/20 4/30 5/5
Cattle Egret *** 3/18 4/5 4/21 5/2 5/8
Black-necked Stilt *** 3/9 3/17 4/21 5/2 5/9
Kentucky Warbler * 4/3 4/14 4/21 After Jun 30 -

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Ruddy Duck * - - Before Mar 1 3/3 5/2
Harris's Sparrow * - - Before Mar 1 3/10 5/12
Ring-billed Gull *** - - Before Mar 1 3/14 5/7
American Wigeon ** - - Before Mar 1 3/30 4/17
Gadwall *** - - Before Mar 1 3/31 4/17
Tree Swallow *** 3/17 3/22 3/25 3/31 5/24
Bufflehead *** - - Before Mar 1 4/1 4/14
American White Pelican ** - - Before Mar 1 4/1 5/1
Great Blue Heron ** - - Before Mar 1 4/1 5/23
Bald Eagle ** - - Before Mar 1 4/1 5/22
Yellow-bellied Sapsucker *** - - Before Mar 1 4/1 4/16
Yellow-rumped Warbler *** 3/2 3/4 3/7 4/1 5/13
Lesser Scaup *** - - Before Mar 1 4/2 4/16
Song Sparrow *** - - Before Mar 1 4/3 4/16
Dark-eyed Junco *** - - Before Mar 1 4/4 4/14
Wilson's Snipe ** 3/5 3/6 3/8 4/5 5/5
Northern Flicker *** 3/2 3/6 3/9 4/5 4/17
Bonaparte's Gull ** 3/2 3/3 3/9 4/6 4/16
Common Loon ** 3/18 3/22 3/27 4/7 5/2
Green-winged Teal *** - - Before Mar 1 4/9 4/23
Double-crested Cormorant *** 3/2 3/7 3/10 4/9 5/8
Hermit Thrush *** 3/14 3/17 3/23 4/9 4/20
Cinnamon Teal * - - Before Mar 1 4/10 5/8
Pied-billed Grebe *** - - Before Mar 1 4/13 5/5
Belted Kingfisher *** 3/5 3/6 3/7 4/15 4/29
Chipping Sparrow *** 3/9 3/18 4/1 4/16 5/16
Cooper's Hawk * 3/2 3/3 3/11 4/17 5/20
Blue-gray Gnatcatcher *** 3/17 3/24 4/8 4/18 6/26
Red-breasted Merganser * - - Before Mar 1 4/20 5/11
Ruby-crowned Kinglet *** 3/2 3/7 3/25 4/21 5/3

Weekly mean spring nocturnal migration activity and direction of movement in the Gulf of Mexico region for the week of 13-19 April, 1995 to 2015. Circular buffers around radar stations represent migration activity scaled to radar reflectivity (a measure of biological activity), with weekly activity represented by size scaled to the activity at KCRP Corpus Christi and seasonal activity represented by colors scaled to the most intense movements of the spring period (L: light, M: moderate, H:heavy); arrows represent mean track direction (a measure of the direction birds are traveling) derived from radial velocity.

Great Plains

Moderate to heavy flights kickoff the period in the central and southern Plains, but these flights are shut down by Sunday with arriving weather. Another round of flights will be aloft by Monday night, again in the central and southern Plains, as favorable conditions in front of an approaching low pressure system spawn moderate flights. Mostly marginal conditions for migration follow the passage of this low pressure center, with intensities and extents of flights significantly reduced for the remainder of the period.

Least Sandpiper. Roger Clark/Macaulay Library. eBird S35823408.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Brown-headed Cowbird ****! 3/14 4/21 5/11 5/19 6/10
Savannah Sparrow *** 3/16 4/17 4/24 5/7 6/23
Say's Phoebe * 3/23 4/14 6/11 6/26 After Jun 30
Eastern Towhee ** 3/23 4/26 5/9 5/22 5/31
Lesser Yellowlegs *** 3/29 4/21 4/26 5/22 5/29
Cattle Egret *** 3/30 4/16 6/22 After Jun 30 -
Northern Rough-winged Swallow *** 3/30 4/21 5/4 5/21 5/27
Chipping Sparrow ****! 3/31 4/26 5/6 5/18 5/27
Western Grebe ** 4/1 4/16 6/12 After Jun 30 -
Brown Thrasher ****! 4/2 4/28 5/7 6/9 6/29
Upland Sandpiper *** 4/3 4/20 5/6 5/11 5/18
Barn Swallow ****! 4/3 4/22 5/18 6/29 After Jun 30
Grasshopper Sparrow *** 4/5 5/27 After Jun 30 - -
Broad-winged Hawk *** 4/6 4/20 4/29 5/21 5/27
Prothonotary Warbler *** 4/6 4/20 5/7 5/21 6/4
Lincoln's Sparrow *** 4/6 4/28 5/4 5/14 5/21
Eared Grebe *** 4/7 4/17 4/26 6/21 After Jun 30
Cassin's Sparrow * 4/7 5/1 6/13 After Jun 30 -
Lark Sparrow ****! 4/7 4/20 5/8 5/16 After Jun 30
Yellow-headed Blackbird ****! 4/7 4/14 6/15 6/20 6/24
White-faced Ibis *** 4/9 4/18 4/26 5/23 After Jun 30
Black-necked Stilt ** 4/9 4/17 4/26 5/2 After Jun 30
American Avocet *** 4/9 4/17 4/25 6/23 After Jun 30
Marbled Godwit * 4/9 6/5 6/13 6/21 After Jun 30
Sora ** 4/10 4/17 5/17 6/21 After Jun 30
Hudsonian Godwit *** 4/11 4/17 4/23 4/29 5/26
Cliff Swallow *** 4/11 4/23 6/16 6/24 After Jun 30
Yellow-rumped Warbler ****! 4/11 4/28 5/4 5/15 5/23
Green Heron *** 4/12 4/23 5/14 6/5 6/11
Black-crowned Night-Heron * 4/12 6/4 6/13 After Jun 30 -
Peregrine Falcon ** 4/12 4/21 5/4 5/16 5/27
Semipalmated Plover *** 4/13 4/20 4/25 5/24 6/1
Semipalmated Sandpiper *** 4/13 4/21 5/15 5/24 6/2
Forster's Tern *** 4/13 4/20 5/13 5/20 After Jun 30
Bank Swallow *** 4/13 4/27 5/15 5/24 After Jun 30
Wilson's Phalarope ****! 4/16 4/21 4/28 5/22 After Jun 30
Solitary Sandpiper *** 4/16 4/25 5/3 5/11 5/23
Chimney Swift ****! 4/16 4/26 5/13 6/9 6/14
House Wren ****! 4/16 4/28 5/12 5/21 6/9
Long-billed Dowitcher *** 4/17 4/21 5/1 5/20 5/27
Willet *** 4/17 4/22 4/29 5/6 After Jun 30
Harris's Sparrow *** 4/17 4/23 5/2 5/13 5/22
Least Sandpiper *** 4/18 4/21 5/14 5/21 5/27
Spotted Sandpiper ****! 4/18 4/28 5/12 5/24 6/1
Ruby-throated Hummingbird *** 4/18 5/1 5/16 5/23 6/12
Eastern Kingbird ****! 4/18 4/30 5/24 6/24 6/26
White-throated Sparrow *** 4/18 4/25 5/1 5/11 5/23
White-crowned Sparrow ****! 4/19 4/28 5/4 5/14 5/21
Western Kingbird ****! 4/20 4/26 6/6 6/26 After Jun 30
Warbling Vireo ****! 4/20 4/29 5/15 5/23 After Jun 30
Orange-crowned Warbler ****! 4/21 4/28 5/5 5/15 5/22
Kentucky Warbler *** 4/21 5/2 5/12 5/29 6/5
Summer Tanager ****! 4/21 5/1 5/10 5/18 After Jun 30

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Eastern Phoebe *** 3/2 3/12 5/5 5/18 After Jun 30
Common Grackle *** 3/2 3/13 5/21 6/11 After Jun 30
American Pipit * 3/2 3/14 4/19 5/7 5/18
Northern Shoveler *** 3/10 3/16 4/14 5/1 After Jun 30
American White Pelican *** 3/13 3/16 4/21 4/29 6/27
Horned Grebe ** 3/9 3/17 4/16 5/6 5/18
Blue-winged Teal ****! 3/11 3/19 4/23 5/23 6/25
Great Blue Heron *** 3/2 3/22 4/24 5/19 After Jun 30
Greater Yellowlegs *** 3/12 3/22 4/20 4/30 5/9
Wood Duck ** 3/2 3/24 5/6 5/24 6/7
Baird's Sandpiper *** 3/14 3/27 4/24 5/24 6/2
Double-crested Cormorant *** 3/12 3/28 4/14 4/29 After Jun 30
Pectoral Sandpiper ** 3/25 3/28 5/16 5/24 5/30
Turkey Vulture *** 3/14 3/30 5/9 5/18 After Jun 30
Field Sparrow *** 3/12 3/31 4/28 5/11 5/18
Vesper Sparrow *** 3/24 3/31 4/22 5/1 5/9
Tree Swallow *** 3/24 4/1 5/1 6/25 After Jun 30
Ruby-crowned Kinglet *** 3/26 4/1 5/1 5/12 5/24
Hermit Thrush * 3/23 4/2 4/22 5/10 5/18
Louisiana Waterthrush ** 3/25 4/2 5/5 5/17 5/22
Yellow-throated Warbler * 3/17 4/2 4/23 5/20 6/5
White-eyed Vireo * 3/19 4/4 5/23 6/12 After Jun 30
Purple Martin *** 3/20 4/4 5/7 After Jun 30 -
Blue-gray Gnatcatcher *** 3/26 4/5 5/6 5/17 5/22
Bonaparte's Gull ** 3/29 4/6 4/18 5/1 5/13
Scissor-tailed Flycatcher *** 3/28 4/7 4/25 6/12 After Jun 30
Pied-billed Grebe *** 3/16 4/8 4/18 4/30 5/11
Great Egret *** 3/24 4/8 4/24 5/8 After Jun 30
Wilson's Snipe ** 3/2 4/8 4/17 6/20 After Jun 30
Northern Parula *** 4/1 4/8 5/7 5/18 5/24
Swainson's Hawk *** 3/31 4/9 4/23 5/2 After Jun 30
American Coot *** 3/14 4/9 4/21 4/30 5/26
Little Blue Heron ** 3/29 4/10 4/29 5/8 5/18
Snowy Egret *** 4/1 4/12 4/27 6/29 After Jun 30
Osprey *** 4/6 4/13 4/23 5/5 5/9
Franklin's Gull *** 4/2 4/13 4/23 5/1 5/24
Say's Phoebe * 3/23 4/14 6/11 6/26 After Jun 30
Yellow-headed Blackbird ** 4/7 4/14 6/15 6/20 6/24
Western Grebe * 4/1 4/16 6/12 After Jun 30 -
Cattle Egret * 3/30 4/16 6/22 After Jun 30 -
Eared Grebe *** 4/7 4/17 4/26 6/21 After Jun 30
Sora ** 4/10 4/17 5/17 6/21 After Jun 30
Black-necked Stilt ** 4/9 4/17 4/26 5/2 After Jun 30
American Avocet *** 4/9 4/17 4/25 6/23 After Jun 30
Hudsonian Godwit *** 4/11 4/17 4/23 4/29 5/26
Savannah Sparrow *** 3/16 4/17 4/24 5/7 6/23
White-faced Ibis *** 4/9 4/18 4/26 5/23 After Jun 30
Broad-winged Hawk *** 4/6 4/20 4/29 5/21 5/27
Semipalmated Plover *** 4/13 4/20 4/25 5/24 6/1
Upland Sandpiper *** 4/3 4/20 5/6 5/11 5/18
Forster's Tern ** 4/13 4/20 5/13 5/20 After Jun 30
Prothonotary Warbler ** 4/6 4/20 5/7 5/21 6/4
Lark Sparrow *** 4/7 4/20 5/8 5/16 After Jun 30
Least Sandpiper *** 4/18 4/21 5/14 5/21 5/27
Semipalmated Sandpiper *** 4/13 4/21 5/15 5/24 6/2
Long-billed Dowitcher *** 4/17 4/21 5/1 5/20 5/27
Wilson's Phalarope ****! 4/16 4/21 4/28 5/22 After Jun 30
Lesser Yellowlegs *** 3/29 4/21 4/26 5/22 5/29
Peregrine Falcon ** 4/12 4/21 5/4 5/16 5/27
Northern Rough-winged Swallow *** 3/30 4/21 5/4 5/21 5/27
Brown-headed Cowbird *** 3/14 4/21 5/11 5/19 6/10

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Northern Pintail ** - 3/2 3/12 6/25 After Jun 30
Northern Harrier *** 3/2 3/7 3/17 4/26 After Jun 30
American Wigeon *** - 3/2 3/24 4/27 After Jun 30
Gadwall *** 3/11 3/17 3/25 After Jun 30 -
Green-winged Teal *** 3/2 3/13 3/27 4/27 5/8
Lesser Scaup *** 3/2 3/17 3/28 4/29 After Jun 30
American Kestrel *** - 3/2 3/30 4/26 5/5
Killdeer ** 3/2 3/7 3/31 5/2 After Jun 30
Sharp-shinned Hawk ** 3/23 3/29 4/5 4/28 5/13
Ruddy Duck *** 3/2 3/16 4/6 5/5 After Jun 30
Common Loon * 3/16 3/24 4/6 5/8 5/14
Belted Kingfisher ** 3/2 3/23 4/9 5/20 6/4
Northern Shoveler *** 3/10 3/16 4/14 5/1 After Jun 30
Double-crested Cormorant *** 3/12 3/28 4/14 4/29 After Jun 30
Horned Grebe ** 3/9 3/17 4/16 5/6 5/18
Wilson's Snipe * 3/2 4/8 4/17 6/20 After Jun 30
Pied-billed Grebe *** 3/16 4/8 4/18 4/30 5/11
Bonaparte's Gull *** 3/29 4/6 4/18 5/1 5/13
American Pipit ** 3/2 3/14 4/19 5/7 5/18
Greater Yellowlegs *** 3/12 3/22 4/20 4/30 5/9
American White Pelican *** 3/13 3/16 4/21 4/29 6/27
American Coot *** 3/14 4/9 4/21 4/30 5/26

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Hooded Merganser ** - - Before Mar 1 3/5 4/27
Brown Creeper ** - - Before Mar 1 3/6 4/23
Common Goldeneye *** - - Before Mar 1 3/22 4/16
Common Merganser *** - - Before Mar 1 3/23 4/15
American Tree Sparrow *** - - Before Mar 1 3/28 4/14
Redhead ** - 3/2 3/14 3/29 After Jun 30
Ring-necked Duck *** - 3/2 3/19 4/2 5/7
Herring Gull ** - - Before Mar 1 4/2 4/30
Bufflehead *** 3/2 3/14 3/23 4/6 5/8
Ring-billed Gull *** 3/2 3/10 3/18 4/8 After Jun 30
Dark-eyed Junco *** 3/16 3/18 3/21 4/8 4/21
Fox Sparrow *** 3/13 3/20 3/28 4/10 4/22
Song Sparrow ** 3/12 3/17 3/31 4/11 After Jun 30

West

Scattered light to locally moderate flights begin the weekend, gradually increasing in extent through Monday and Tuesday. By Tuesday the first of two new weather system arrives at the coast, and begins to shut down movements as it passes through the region on Wednesday; the second has similar effects as it follows in its wake, further slowing and stopping most movements. By the end of the period, favorable conditions return to portions of the Pacific Northwest, where moderate flights are likely.

Townsend’s Warbler. Brandon Hawn/Macaulay Library. eBird S35891119.

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 Rough-winged Swallow *** 3/2 4/23 5/8 5/29 After Jun 30
Whimbrel * 3/16 4/18 4/29 5/8 5/21
Pacific-slope Flycatcher *** 3/16 4/25 5/31 6/22 After Jun 30
Western Kingbird *** 3/19 4/30 5/15 6/4 6/10
Cliff Swallow *** 3/19 4/26 6/19 After Jun 30 -
Caspian Tern *** 3/25 4/14 4/28 5/6 5/12
Cassin's Vireo ** 3/28 4/18 5/9 After Jun 30 -
Barn Swallow *** 3/30 4/23 5/19 6/1 6/12
Nashville Warbler *** 3/30 4/15 4/27 5/7 6/26
Brewer's Blackbird *** 3/31 4/15 5/29 After Jun 30 -
Yellow-rumped Warbler ** 4/2 4/14 4/19 5/18 5/28
Green Heron * 4/3 4/21 5/10 5/28 6/8
Ash-throated Flycatcher *** 4/5 4/14 5/8 6/9 6/19
Dunlin ** 4/8 4/23 4/27 5/7 5/15
Least Sandpiper *** 4/8 4/22 4/28 5/7 5/15
Greater White-fronted Goose * 4/10 4/15 4/22 5/5 5/14
Brant * 4/10 4/15 4/20 5/1 5/14
Marbled Godwit ** 4/10 4/16 4/25 5/6 5/11
Western Sandpiper *** 4/10 4/16 4/29 5/7 5/14
Hammond's Flycatcher ** 4/10 4/21 6/10 6/25 After Jun 30
Chipping Sparrow *** 4/10 5/6 5/14 5/21 5/26
Forster's Tern ** 4/11 4/24 5/9 5/19 6/11
Brown-headed Cowbird ****! 4/11 5/3 5/17 6/1 6/20
Vaux's Swift *** 4/12 4/23 5/8 5/12 5/21
Bank Swallow ** 4/12 4/25 5/19 5/31 6/8
Wilson's Warbler ****! 4/12 4/24 5/10 6/1 6/6
Lazuli Bunting *** 4/12 4/25 5/16 After Jun 30 -
Hermit Warbler *** 4/13 4/24 5/7 After Jun 30 -
Semipalmated Plover *** 4/16 4/23 4/30 5/7 5/14
Olive-sided Flycatcher *** 4/17 5/1 6/3 6/17 6/27
Dusky Flycatcher ** 4/17 5/6 6/9 6/25 After Jun 30
Yellow-breasted Chat *** 4/17 5/6 5/25 6/16 6/23
House Wren *** 4/18 5/1 5/24 6/17 6/22
Calliope Hummingbird * 4/19 6/8 6/14 6/25 After Jun 30
Warbling Vireo *** 4/19 5/1 6/3 6/25 After Jun 30
Green-tailed Towhee *** 4/19 4/23 5/11 5/17 5/22
Townsend's Warbler *** 4/20 4/25 5/9 5/19 6/3
Red-necked Phalarope *** 4/21 4/25 5/15 5/27 6/1

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Violet-green Swallow *** 3/2 3/17 5/18 5/24 5/29
Hooded Oriole ** 3/12 3/26 4/28 5/15 6/14
Tree Swallow *** 3/2 4/2 5/12 5/29 6/11
White-throated Swift * 3/2 4/3 5/29 After Jun 30 -
Osprey *** 3/22 4/4 4/21 4/30 5/23
Orange-crowned Warbler *** 3/20 4/4 5/1 5/15 5/22
Golden-crowned Sparrow * 4/1 4/5 4/15 4/28 5/15
Black-necked Stilt ** 3/28 4/6 4/28 5/10 6/4
American Avocet ** 3/28 4/6 4/29 5/10 6/6
Greater Yellowlegs ** 3/25 4/6 4/16 5/2 5/11
Black-chinned Hummingbird *** 3/16 4/6 5/17 5/30 6/10
Cinnamon Teal ** 3/2 4/7 4/19 5/8 6/6
Common Yellowthroat *** 3/19 4/7 5/19 6/11 6/16
Swainson's Hawk ** 3/28 4/8 5/1 5/31 6/5
Savannah Sparrow ** 3/26 4/8 4/25 5/5 5/19
Eared Grebe * 3/27 4/9 4/21 5/8 6/1
Willet ** 4/7 4/9 4/30 5/6 5/10
Black-bellied Plover * 4/6 4/10 4/23 5/7 5/27
Yellow-headed Blackbird ** 4/1 4/10 5/14 5/30 6/3
Common Loon ** 3/31 4/12 4/19 5/3 5/12
Black-throated Gray Warbler *** 3/27 4/13 4/27 5/7 6/10
Caspian Tern ** 3/25 4/14 4/28 5/6 5/12
Ash-throated Flycatcher *** 4/5 4/14 5/8 6/9 6/19
Yellow-rumped Warbler ** 4/2 4/14 4/19 5/18 5/28
Greater White-fronted Goose * 4/10 4/15 4/22 5/5 5/14
Brant * 4/10 4/15 4/20 5/1 5/14
Nashville Warbler *** 3/30 4/15 4/27 5/7 6/26
Brewer's Blackbird ** 3/31 4/15 5/29 After Jun 30 -
Marbled Godwit ** 4/10 4/16 4/25 5/6 5/11
Western Sandpiper *** 4/10 4/16 4/29 5/7 5/14
Whimbrel * 3/16 4/18 4/29 5/8 5/21
Cassin's Vireo ** 3/28 4/18 5/9 After Jun 30 -
Green Heron * 4/3 4/21 5/10 5/28 6/8
Hammond's Flycatcher * 4/10 4/21 6/10 6/25 After Jun 30

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Cackling Goose * - - Before Mar 1 5/1 5/13
American Wigeon *** - - Before Mar 1 4/14 5/17
Canvasback * - - Before Mar 1 4/17 4/30
Greater Scaup * - - Before Mar 1 5/5 5/21
Bufflehead *** - - Before Mar 1 4/28 5/19
Common Merganser ** - - Before Mar 1 4/22 5/17
Ruddy Duck ** - - Before Mar 1 5/17 6/3
Pied-billed Grebe ** - - Before Mar 1 4/20 5/31
Horned Grebe * - - Before Mar 1 5/1 5/12
American Coot ** - - Before Mar 1 4/30 6/4
Ruby-crowned Kinglet *** - 3/2 3/9 4/25 5/17
Ring-necked Duck ** - 3/2 3/10 4/30 5/17
Lesser Scaup ** 3/2 3/11 3/15 4/27 5/21
Surf Scoter * 3/15 3/18 3/21 5/3 5/21
Green-winged Teal *** 3/20 3/22 3/26 5/2 5/12
Broad-billed Hummingbird * 3/2 3/14 3/28 6/1 6/6
Cooper's Hawk * 3/2 3/14 3/29 5/14 5/26
Northern Shoveler *** 3/20 3/25 4/8 5/5 6/2
Rufous Hummingbird * 3/2 3/19 4/8 5/6 5/20
Mountain Bluebird * 3/2 3/9 4/10 4/23 4/27
White-crowned Sparrow *** 3/20 3/27 4/11 4/26 5/23
Gadwall ** 3/9 3/23 4/13 5/19 After Jun 30
Sharp-shinned Hawk * 4/7 4/10 4/13 5/3 5/20
American Pipit ** 4/2 4/8 4/13 5/8 5/18
Golden-crowned Sparrow *** 4/1 4/5 4/15 4/28 5/15
Greater Yellowlegs *** 3/25 4/6 4/16 5/2 5/11
Cinnamon Teal ** 3/2 4/7 4/19 5/8 6/6
Common Loon ** 3/31 4/12 4/19 5/3 5/12
Yellow-rumped Warbler *** 4/2 4/14 4/19 5/18 5/28
Brant * 4/10 4/15 4/20 5/1 5/14
Eared Grebe ** 3/27 4/9 4/21 5/8 6/1
Osprey ** 3/22 4/4 4/21 4/30 5/23

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Glaucous-winged Gull ** - - Before Mar 1 3/3 5/13
Mew Gull * - - Before Mar 1 3/7 5/3
Ring-billed Gull *** - - Before Mar 1 3/17 5/1
Northern Pintail ** - - Before Mar 1 3/22 5/14
Varied Thrush ** - - Before Mar 1 4/5 4/27
Hooded Merganser ** - - Before Mar 1 4/8 5/2
Common Goldeneye *** - - Before Mar 1 4/9 4/26
Dark-eyed Junco *** 3/2 3/3 3/9 4/10 4/24
American Wigeon *** - - Before Mar 1 4/14 5/17
Canvasback ** - - Before Mar 1 4/17 4/30
Pied-billed Grebe ** - - Before Mar 1 4/20 5/31

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Farnsworth and Van Doren

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