Regional Migration Forecast: 19-26 May 2017

Mourning Warbler. Felipe Pimentel/Macaulay Library. eBird S36967529.

Continental Summary

Light to moderate flights becomes increasingly likely in the West and will feature White-throated Swift, Willow Flycatcher, Western Wood-Pewee, Eastern Kingbird, Swainson’s Thrush, MacGillivray’s Warbler, and Western Tanager, as spring migration winds down, while scattered moderate to heavy flights featuring Black Tern, Common Nighthawk, Chimney Swift, Yellow-billed Cuckoo, Acadian Flycatcher, Philadelphia Vireo, Cedar Waxwing, and Mourning Warbler will punctuate the migration scene in the East amidst unsettled conditions.

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

A disturbance begins the weekend and ushers in a period of marginal migration conditions in many areas. Given the date, moderate to heavy flights may occur locally if wind conditions are calm or even from lightly opposing directions. Additionally, precipitation is forecast in some areas, creating a potential for concentrations and even local fallouts, so birders should watch where nocturnal migration and rain overlap; this is particularly true on Saturday and Sunday nights. The marginal and locally favorable migration conditions continue in many areas through the early part of the week, and moderate to heavy flights are likely in these areas. The likelihood of such movements shifts to the east as the work week continues as another low pressure center enters the region and starts to shut down movements in the Midwest and portions of the Great Lakes. The greatest intensity and extent of flights will come at the end of the period, as favorable conditions on Thursday night will spawn widespread moderate to locally very heavy flights.

Cedar Waxwing. Sheila Bremer/Macaulay Library. eBird S36737212.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Cedar Waxwing ****! 5/8 5/20 5/31 6/23 6/25
Willow Flycatcher ****! 5/11 5/19 5/29 6/16 6/26
Yellow-bellied Flycatcher *** 5/17 5/19 5/24 6/1 6/4
Alder Flycatcher ****! 5/17 5/20 5/29 6/5 6/26
Dickcissel *** 5/19 5/31 6/15 After Jun 30 -

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Common Grackle *** 3/4 3/10 5/19 6/24 After Jun 30
Vesper Sparrow * 3/28 4/6 6/11 6/19 6/22
Barn Swallow *** 4/5 4/24 5/19 5/29 6/6
Chimney Swift *** 4/19 4/27 5/19 6/4 6/18
Yellow-breasted Chat * 4/22 4/27 6/12 After Jun 30 -
Grasshopper Sparrow ** 4/19 4/30 6/10 After Jun 30 -
Clay-colored Sparrow * 4/27 5/1 5/19 5/27 After Jun 30
Great Crested Flycatcher ****! 4/25 5/3 5/22 6/12 6/27
Marsh Wren ** 4/25 5/3 5/23 5/30 6/2
Sedge Wren * 4/23 5/4 6/10 6/29 After Jun 30
Eastern Kingbird ****! 4/25 5/5 5/21 6/1 6/11
Common Yellowthroat ****! 4/27 5/5 5/20 5/25 6/2
Acadian Flycatcher *** 4/28 5/6 6/2 6/16 After Jun 30
Indigo Bunting *** 4/27 5/6 6/22 6/25 After Jun 30
Bobolink ** 4/29 5/6 6/8 6/22 After Jun 30
Ruby-throated Hummingbird *** 4/27 5/7 5/22 5/31 6/5
Black-crowned Night-Heron * 3/27 5/8 5/20 5/29 6/1
Semipalmated Plover *** 5/4 5/8 5/22 5/31 6/5
Dunlin *** 5/5 5/8 5/21 5/29 6/4
Yellow-billed Cuckoo *** 4/30 5/8 5/30 6/4 6/18
Common Nighthawk *** 5/5 5/8 5/21 5/31 6/3
Philadelphia Vireo ** 5/5 5/9 5/19 5/26 5/31
Red-eyed Vireo ****! 4/30 5/9 5/27 6/1 6/5
Black-billed Cuckoo ** 5/2 5/10 5/26 6/3 6/11
Eastern Wood-Pewee ****! 5/4 5/11 5/27 6/1 6/26
Blackpoll Warbler ****! 5/6 5/11 5/19 5/25 6/1
Canada Warbler *** 5/8 5/11 5/20 5/27 5/31
Semipalmated Sandpiper *** 5/6 5/15 5/25 6/3 6/11
Olive-sided Flycatcher ** 5/8 5/18 5/22 5/29 6/3
Mourning Warbler *** 5/7 5/18 5/23 5/30 6/2
Yellow-bellied Flycatcher *** 5/17 5/19 5/24 6/1 6/4
Willow Flycatcher *** 5/11 5/19 5/29 6/16 6/26
Alder Flycatcher *** 5/17 5/20 5/29 6/5 6/26
Cedar Waxwing ****! 5/8 5/20 5/31 6/23 6/25

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Bald Eagle * 3/5 3/7 3/10 5/28 6/7
Pectoral Sandpiper * 3/20 3/29 4/18 5/23 6/5
Double-crested Cormorant *** 3/19 4/1 4/20 5/30 6/7
Greater Yellowlegs *** 3/25 4/13 4/26 5/19 5/29
Caspian Tern * 4/1 4/9 4/28 5/20 6/4
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
Savannah Sparrow ** 4/4 4/13 5/6 5/24 6/21
Red-winged Blackbird *** 3/2 3/9 5/6 5/28 6/25
Tree Swallow *** 3/28 4/1 5/7 6/24 6/26
Sora ** 4/11 4/20 5/8 5/20 5/29
Orange-crowned Warbler *** 4/26 4/30 5/8 5/19 5/24
Nashville Warbler *** 4/27 5/1 5/8 5/19 5/24
White-crowned Sparrow *** 4/27 4/30 5/8 5/19 5/23
Kentucky Warbler * 4/20 4/25 5/9 6/28 After Jun 30
Forster's Tern ** 4/1 4/12 5/10 5/22 6/4
Lincoln's Sparrow *** 4/28 5/6 5/10 5/20 5/26
Rose-breasted Grosbeak *** 4/27 5/1 5/10 5/22 5/27
Yellow-throated Vireo ** 4/23 5/3 5/11 5/22 6/19
Northern Waterthrush *** 4/24 4/30 5/11 5/20 5/27
Golden-winged Warbler ** 5/1 5/6 5/11 5/19 5/24
Great Blue Heron ** 3/9 3/22 5/12 5/30 6/7
Great Egret *** 3/23 3/31 5/12 5/29 6/3
Wood Thrush *** 4/25 4/30 5/12 5/24 6/1
Cape May Warbler *** 5/3 5/7 5/12 5/19 5/22
Orchard Oriole *** 4/22 4/28 5/12 5/26 5/29
Baltimore Oriole *** 4/28 5/3 5/12 5/24 6/26
Least Flycatcher *** 4/29 5/5 5/13 5/24 5/31
Gray Catbird *** 4/26 4/30 5/13 5/24 6/2
Blackburnian Warbler *** 4/29 5/7 5/13 5/24 5/31
Swainson's Thrush *** 5/4 5/8 5/14 5/24 5/31
Bay-breasted Warbler *** 5/5 5/9 5/14 5/21 5/28
Yellow Warbler *** 4/24 4/30 5/14 5/31 6/26
Chestnut-sided Warbler *** 5/2 5/7 5/14 5/24 6/1
Scarlet Tanager *** 4/28 5/7 5/14 5/24 After Jun 30
Veery *** 4/29 5/5 5/15 5/31 6/3
Gray-cheeked Thrush *** 5/4 5/8 5/15 5/22 5/31
Tennessee Warbler *** 5/2 5/8 5/15 5/23 5/27
Magnolia Warbler *** 5/3 5/7 5/15 5/23 5/29
Least Sandpiper *** 4/28 5/7 5/16 5/26 6/2
Spotted Sandpiper *** 4/22 4/28 5/16 5/28 6/2
Bank Swallow ** 4/18 4/27 5/16 5/27 6/5
American Redstart *** 5/1 5/7 5/16 5/24 6/4
Wilson's Warbler *** 5/5 5/9 5/16 5/26 5/31
Short-billed Dowitcher *** 5/5 5/11 5/17 5/28 6/2
Purple Martin ** 3/29 4/11 5/17 6/1 6/8
Cliff Swallow ** 4/16 4/25 5/17 5/27 5/31
Herring Gull ** 5/7 5/11 5/18 6/3 6/9
Black Tern * 5/5 5/10 5/18 5/25 6/25
Common Tern ** 5/3 5/8 5/18 6/1 6/5
Warbling Vireo *** 4/25 5/2 5/18 5/24 6/25
Chimney Swift *** 4/19 4/27 5/19 6/4 6/18
Philadelphia Vireo *** 5/5 5/9 5/19 5/26 5/31
Barn Swallow *** 4/5 4/24 5/19 5/29 6/6
Blackpoll Warbler *** 5/6 5/11 5/19 5/25 6/1
Clay-colored Sparrow * 4/27 5/1 5/19 5/27 After Jun 30
Common Grackle *** 3/4 3/10 5/19 6/24 After Jun 30
Black-crowned Night-Heron * 3/27 5/8 5/20 5/29 6/1
Common Yellowthroat *** 4/27 5/5 5/20 5/25 6/2
Canada Warbler *** 5/8 5/11 5/20 5/27 5/31
Dunlin *** 5/5 5/8 5/21 5/29 6/4
Common Nighthawk *** 5/5 5/8 5/21 5/31 6/3
Eastern Kingbird *** 4/25 5/5 5/21 6/1 6/11
Semipalmated Plover *** 5/4 5/8 5/22 5/31 6/5
Ruby-throated Hummingbird *** 4/27 5/7 5/22 5/31 6/5
Olive-sided Flycatcher ** 5/8 5/18 5/22 5/29 6/3
Great Crested Flycatcher *** 4/25 5/3 5/22 6/12 6/27
Marsh Wren * 4/25 5/3 5/23 5/30 6/2
Mourning Warbler *** 5/7 5/18 5/23 5/30 6/2
Yellow-bellied Flycatcher ** 5/17 5/19 5/24 6/1 6/4
Semipalmated Sandpiper *** 5/6 5/15 5/25 6/3 6/11
Black-billed Cuckoo * 5/2 5/10 5/26 6/3 6/11

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Horned Lark * - - Before Mar 1 3/15 After Jun 30
American Woodcock * 3/5 3/10 3/16 3/22 5/30
Killdeer * 3/2 3/8 4/1 4/9 6/5
Eastern Phoebe *** 3/12 4/1 4/10 4/14 6/2
Common Loon ** 3/17 3/26 4/12 4/22 6/4
American Coot *** 3/2 3/7 4/4 4/29 5/21
Yellow-throated Warbler ** 4/1 4/8 4/26 5/2 5/19
Field Sparrow * 3/30 4/9 4/28 5/9 6/18
Swamp Sparrow *** 4/3 4/11 5/2 5/9 5/25
Song Sparrow * 3/7 3/13 4/10 5/10 6/24
Cooper's Hawk *** 3/15 4/6 4/26 5/11 5/25
Blue-gray Gnatcatcher *** 4/5 4/16 5/4 5/11 5/29
Brown-headed Cowbird *** 3/11 4/6 5/3 5/11 After Jun 30
Blue-winged Warbler *** 4/24 4/30 5/7 5/12 6/27
Red-headed Woodpecker * 4/20 4/29 5/8 5/13 6/18
White-eyed Vireo *** 4/11 4/23 5/4 5/13 5/21
Green Heron ** 4/16 4/26 5/9 5/14 6/2
Blue-headed Vireo *** 4/18 4/26 5/5 5/14 5/21
Louisiana Waterthrush * 3/29 4/6 4/30 5/14 6/17
House Wren *** 4/18 4/29 5/10 5/15 5/26
Ovenbird *** 4/26 5/2 5/11 5/16 5/31
Black-throated Blue Warbler *** 4/28 5/6 5/11 5/16 5/24
Black-throated Green Warbler *** 4/25 5/1 5/10 5/16 5/26
Solitary Sandpiper *** 4/23 4/30 5/7 5/17 5/23
Black-and-white Warbler *** 4/24 5/2 5/9 5/17 5/25
Prothonotary Warbler *** 4/12 4/20 5/11 5/17 5/22
Northern Parula *** 4/28 5/6 5/11 5/17 5/25
Lesser Yellowlegs *** 3/28 4/14 5/4 5/18 5/26
Yellow-rumped Warbler *** 4/8 4/24 5/5 5/18 5/23
Summer Tanager ** 4/20 4/27 5/8 5/18 5/22
Greater Yellowlegs *** 3/25 4/13 4/26 5/19 5/29
Golden-winged Warbler *** 5/1 5/6 5/11 5/19 5/24
Orange-crowned Warbler *** 4/26 4/30 5/8 5/19 5/24
Nashville Warbler *** 4/27 5/1 5/8 5/19 5/24
Cape May Warbler *** 5/3 5/7 5/12 5/19 5/22
Palm Warbler *** 4/3 4/25 5/4 5/19 5/23
White-crowned Sparrow *** 4/27 4/30 5/8 5/19 5/23
Sora ** 4/11 4/20 5/8 5/20 5/29
Caspian Tern ** 4/1 4/9 4/28 5/20 6/4
Northern Rough-winged Swallow *** 3/31 4/16 5/1 5/20 5/29
Northern Waterthrush *** 4/24 4/30 5/11 5/20 5/27
Lincoln's Sparrow *** 4/28 5/6 5/10 5/20 5/26
Bay-breasted Warbler *** 5/5 5/9 5/14 5/21 5/28
Forster's Tern ** 4/1 4/12 5/10 5/22 6/4
Yellow-throated Vireo ** 4/23 5/3 5/11 5/22 6/19
Gray-cheeked Thrush *** 5/4 5/8 5/15 5/22 5/31
Rose-breasted Grosbeak *** 4/27 5/1 5/10 5/22 5/27
Pectoral Sandpiper * 3/20 3/29 4/18 5/23 6/5
Tennessee Warbler *** 5/2 5/8 5/15 5/23 5/27
Magnolia Warbler *** 5/3 5/7 5/15 5/23 5/29
Least Flycatcher *** 4/29 5/5 5/13 5/24 5/31
Warbling Vireo *** 4/25 5/2 5/18 5/24 6/25
Swainson's Thrush *** 5/4 5/8 5/14 5/24 5/31
Wood Thrush *** 4/25 4/30 5/12 5/24 6/1
Gray Catbird *** 4/26 4/30 5/13 5/24 6/2
American Redstart *** 5/1 5/7 5/16 5/24 6/4
Blackburnian Warbler *** 4/29 5/7 5/13 5/24 5/31
Chestnut-sided Warbler *** 5/2 5/7 5/14 5/24 6/1
Savannah Sparrow * 4/4 4/13 5/6 5/24 6/21
Scarlet Tanager *** 4/28 5/7 5/14 5/24 After Jun 30
Baltimore Oriole *** 4/28 5/3 5/12 5/24 6/26
Black Tern * 5/5 5/10 5/18 5/25 6/25
Common Yellowthroat *** 4/27 5/5 5/20 5/25 6/2
Blackpoll Warbler *** 5/6 5/11 5/19 5/25 6/1
Least Sandpiper *** 4/28 5/7 5/16 5/26 6/2
Philadelphia Vireo *** 5/5 5/9 5/19 5/26 5/31
Wilson's Warbler *** 5/5 5/9 5/16 5/26 5/31
Orchard Oriole *** 4/22 4/28 5/12 5/26 5/29

Gulf Coast and Southeast

Moderate to heavy flights will occur in many areas of the region this weekend, with increasing potential for fallouts from Saturday through Tuesday. A frontal boundary and associated precipitation stalls in the Gulf Coast region, creating a scenario where birds arriving over the Gulf of Mexico may encounter rain. This potential is distributed along the Gulf Coast, and does not change significantly until Tuesday night as the frontal boundary shifts to the east. As this happens, conditions in the western Gulf of Mexico becomes highly unfavorable for migration, whereas conditions in the eastern Gulf and Florida in particular become quite good for moderate to heavy flights. Some of these flights may pile up along the east coast of Florida, creating a nice listening opportunity on Tuesday night to hear nocturnal flight calls. This frontal passage also has the potential to entrain yet more migrants into low pressure departing into the western North Atlantic, similar to previous events this spring, suggesting a watchful eye farther north in Canada. Most of the region is quiet by Wednesday night, with the exception of portions of inland Texas where moderate to heavy flights will occur. Thursday night sees these flights expand to many areas of the region away from the Florida Peninsula and southeastern coastal plain.

Yellow-billed Cuckoo. Aaron Evans/Macaulay Library. eBird S36930664.

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Try again next year!

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Purple Martin ** 3/16 3/22 6/22 After Jun 30 -
Ash-throated Flycatcher * 3/15 4/6 5/24 5/31 6/3
Bullock's Oriole * 4/5 4/17 5/24 5/31 After Jun 30
Yellow-breasted Chat ** 4/11 4/18 6/7 6/24 After Jun 30
Acadian Flycatcher ** 4/13 4/23 6/5 6/16 After Jun 30
Yellow-billed Cuckoo *** 4/11 5/9 6/6 6/12 After Jun 30

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Cedar Waxwing *** 3/2 3/20 3/27 5/22 5/28
Louisiana Waterthrush * 3/14 3/22 4/2 5/24 6/13
Western Sandpiper * 3/2 3/7 4/14 5/22 5/31
White-eyed Vireo ** 3/6 3/22 4/15 6/13 6/26
Sanderling ** 3/30 4/13 4/19 5/30 6/7
Kentucky Warbler * 4/3 4/14 4/21 After Jun 30 -
Yellow-throated Vireo * 3/13 3/24 4/22 After Jun 30 -
Ruddy Turnstone ** 4/8 4/14 4/23 5/24 5/31
Dunlin ** 4/9 4/13 4/23 5/25 6/3
Brown-crested Flycatcher * 3/31 4/17 4/23 5/31 6/4
Black-bellied Plover *** 4/9 4/14 4/24 5/20 5/28
Chuck-will's-widow * 3/29 4/10 4/24 6/25 After Jun 30
Semipalmated Plover ** 4/8 4/15 4/25 5/29 6/6
Blue Grosbeak * 4/7 4/17 4/27 6/21 6/24
Bronzed Cowbird * 4/2 4/13 4/27 5/31 6/4
Bell's Vireo * 4/5 4/17 4/28 6/1 6/9
Painted Bunting ** 4/11 4/21 4/29 After Jun 30 -
Brown-headed Cowbird *** 3/7 3/18 4/29 5/23 After Jun 30
Stilt Sandpiper * 3/16 4/14 4/30 5/19 5/26
Lark Sparrow * 3/16 4/6 5/1 5/29 After Jun 30
Dickcissel *** 4/18 4/23 5/1 5/21 5/26
Bank Swallow ** 3/31 4/18 5/2 5/19 5/26
Barn Swallow *** 3/10 3/22 5/2 5/19 5/27
Baird's Sandpiper * 3/9 3/29 5/3 5/19 5/28
Black-chinned Hummingbird * 3/2 3/17 5/4 5/24 6/2
Spotted Sandpiper *** 4/12 4/22 5/5 5/20 5/26
Mississippi Kite ** 4/17 4/24 5/7 5/22 5/26
American Robin *** 4/23 4/28 5/7 5/23 After Jun 30
Eastern Phoebe ** 4/23 4/26 5/8 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
Chimney Swift *** 3/23 4/2 5/11 5/25 5/29
Wilson's Warbler *** 4/20 4/30 5/11 5/19 5/23
Eastern Wood-Pewee *** 4/14 4/24 5/12 5/22 5/26
Least Flycatcher *** 4/24 4/30 5/12 5/19 5/23
Scissor-tailed Flycatcher ** 3/16 3/26 5/12 5/30 After Jun 30
Red-eyed Vireo *** 4/1 4/15 5/12 5/24 After Jun 30
Cliff Swallow ** 3/12 4/4 5/12 5/20 6/17
Mourning Warbler ** 4/24 5/9 5/13 5/20 5/26
Canada Warbler *** 4/13 5/7 5/13 5/20 5/25
White-rumped Sandpiper ** 4/21 4/30 5/14 5/20 6/13
Semipalmated Sandpiper *** 3/29 4/18 5/14 5/31 6/9
Common Nighthawk ** 4/11 4/20 5/14 6/13 After Jun 30
Black Tern ** 5/9 5/11 5/15 5/20 5/23
Yellow-bellied Flycatcher *** 5/9 5/11 5/15 5/19 5/22
Ash-throated Flycatcher ** 3/15 4/6 5/24 5/31 6/3
Bullock's Oriole * 4/5 4/17 5/24 5/31 After Jun 30

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Tree Swallow *** 3/17 3/22 3/25 3/31 5/24
Great Blue Heron ** - - Before Mar 1 4/1 5/23
Bald Eagle ** - - Before Mar 1 4/1 5/22
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
Prothonotary Warbler * 3/25 4/5 4/18 4/22 6/26
Broad-winged Hawk ** 3/19 3/26 4/13 4/24 5/26
Yellow-throated Warbler * 3/2 3/8 4/9 4/25 After Jun 30
Prairie Warbler * 3/22 4/3 4/18 4/26 6/18
Northern Shoveler *** - - Before Mar 1 4/28 5/21
Blue-winged Teal *** 3/2 3/22 4/4 5/1 5/23
Couch's Kingbird * 3/2 3/12 3/27 5/1 5/30
Franklin's Gull * 3/28 4/5 4/19 5/2 5/23
Whimbrel ** 4/5 4/11 4/25 5/4 6/1
Short-billed Dowitcher ** 3/13 4/13 4/20 5/4 5/21
Baltimore Oriole *** 4/10 4/14 4/27 5/5 5/19
Swainson's Hawk * 3/17 3/29 4/18 5/6 6/1
Lesser Yellowlegs *** 3/7 4/13 4/25 5/7 5/24
Veery *** 4/15 4/20 5/2 5/8 5/20
Wood Thrush * 4/12 4/17 4/26 5/8 6/20
Nashville Warbler *** 4/5 4/13 4/26 5/8 5/19
Bobolink *** 4/18 4/25 5/4 5/8 5/21
Solitary Sandpiper *** 4/1 4/15 4/26 5/9 5/19
Ovenbird ** 4/11 4/17 4/29 5/9 After Jun 30
Blue-headed Vireo ** 3/2 3/3 4/8 5/10 5/26
Northern Parula ** 3/2 3/15 4/18 5/10 6/25
Indigo Bunting ** 4/3 4/16 4/27 5/10 6/23
Blackpoll Warbler *** 4/15 4/19 5/4 5/11 5/22
Northern Rough-winged Swallow ** 3/2 3/22 5/1 5/12 After Jun 30
Northern Waterthrush *** 4/12 4/16 4/28 5/15 5/21
Tennessee Warbler *** 4/10 4/14 4/27 5/15 5/19
Black-throated Green Warbler *** 4/9 4/14 4/29 5/15 5/22
Yellow-crowned Night-Heron * 3/2 4/9 5/1 5/16 5/20
Philadelphia Vireo *** 4/23 4/27 5/1 5/16 5/20
Gray-cheeked Thrush *** 4/15 4/20 4/26 5/16 5/21
Common Yellowthroat *** 4/5 4/15 5/2 5/16 5/24
American Redstart *** 4/13 4/29 5/10 5/16 5/23
Magnolia Warbler *** 4/21 4/26 5/11 5/16 5/20
Blackburnian Warbler *** 4/13 4/26 5/11 5/16 5/21
Chestnut-sided Warbler *** 4/22 4/26 5/3 5/16 5/21
Ruby-throated Hummingbird *** 3/15 4/6 4/26 5/17 5/23
Olive-sided Flycatcher ** 4/20 5/8 5/12 5/17 6/2
Warbling Vireo *** 4/5 4/13 5/2 5/17 5/23
Swainson's Thrush *** 4/13 4/17 5/4 5/17 5/23
Yellow Warbler *** 4/14 4/25 5/1 5/17 5/22
Orchard Oriole ** 3/31 4/13 4/26 5/17 6/19
Green Heron ** 3/26 4/10 4/28 5/18 5/22
Least Sandpiper *** 4/13 4/22 5/2 5/18 5/24
Pectoral Sandpiper ** 3/2 3/23 4/28 5/18 5/28
Wilson's Phalarope *** 4/14 4/21 5/4 5/18 5/26
Eastern Kingbird *** 3/27 4/8 4/29 5/18 5/24
Stilt Sandpiper *** 3/16 4/14 4/30 5/19 5/26
Baird's Sandpiper * 3/9 3/29 5/3 5/19 5/28
Yellow-bellied Flycatcher *** 5/9 5/11 5/15 5/19 5/22
Least Flycatcher *** 4/24 4/30 5/12 5/19 5/23
Bank Swallow ** 3/31 4/18 5/2 5/19 5/26
Barn Swallow *** 3/10 3/22 5/2 5/19 5/27
Wilson's Warbler *** 4/20 4/30 5/11 5/19 5/23
Black-bellied Plover *** 4/9 4/14 4/24 5/20 5/28
White-rumped Sandpiper ** 4/21 4/30 5/14 5/20 6/13
Spotted Sandpiper *** 4/12 4/22 5/5 5/20 5/26
Black Tern ** 5/9 5/11 5/15 5/20 5/23
Cliff Swallow * 3/12 4/4 5/12 5/20 6/17
Mourning Warbler ** 4/24 5/9 5/13 5/20 5/26
Canada Warbler *** 4/13 5/7 5/13 5/20 5/25
Dickcissel *** 4/18 4/23 5/1 5/21 5/26
Mississippi Kite *** 4/17 4/24 5/7 5/22 5/26
Western Sandpiper * 3/2 3/7 4/14 5/22 5/31
Eastern Wood-Pewee *** 4/14 4/24 5/12 5/22 5/26
Cedar Waxwing *** 3/2 3/20 3/27 5/22 5/28
American Robin * 4/23 4/28 5/7 5/23 After Jun 30
Brown-headed Cowbird *** 3/7 3/18 4/29 5/23 After Jun 30
Ruddy Turnstone *** 4/8 4/14 4/23 5/24 5/31
Black-chinned Hummingbird ** 3/2 3/17 5/4 5/24 6/2
Red-eyed Vireo *** 4/1 4/15 5/12 5/24 After Jun 30
Louisiana Waterthrush * 3/14 3/22 4/2 5/24 6/13
Dunlin *** 4/9 4/13 4/23 5/25 6/3
Chimney Swift *** 3/23 4/2 5/11 5/25 5/29

Weekly mean spring nocturnal migration activity and direction of movement in the Gulf of Mexico region for the week of 18-24 May, 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

A strong disturbance passing through the region keeps any favorable conditions for migration local and scattered. The northern Plains will see moderate to heavy flights on Friday, with more southerly locations experiencing mostly moderate flights on Sunday night. Once this system clears the region, unfavorable conditions build into most areas, with migration primarily light and local. In areas where winds are light, more intense movements may occur (e.g. in the northern Plains). The first significant change to this pattern occurs on Wednesday and Thursday nights, when marginal and locally favorable conditions return to the western Plains; so, too, will moderate to locally heavy flights. More intense flights are also likely by Thursday night in the southern Plains, as favorable migration conditions build as high pressure moves in to the south and east.

Black Tern. Brett Sandercock/Macaulay Library. eBird S36922549.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Grasshopper Sparrow *** 4/5 5/27 After Jun 30 - -
Marbled Godwit * 4/9 6/5 6/13 6/21 After Jun 30
Black-crowned Night-Heron * 4/12 6/4 6/13 After Jun 30 -
Sedge Wren * 4/28 6/11 6/14 6/20 6/23
Common Nighthawk *** 4/29 5/22 5/30 6/5 After Jun 30
Yellow-breasted Chat *** 4/30 5/29 6/2 6/8 6/11
Blue Grosbeak *** 4/30 5/30 6/5 6/10 6/13
Yellow-billed Cuckoo *** 5/2 5/24 5/31 After Jun 30 -
Marsh Wren ** 5/14 6/6 6/15 6/21 6/26
Western Wood-Pewee *** 5/15 5/24 6/5 6/17 After Jun 30

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Common Grackle *** 3/2 3/13 5/21 6/11 After Jun 30
White-eyed Vireo * 3/19 4/4 5/23 6/12 After Jun 30
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 -
Cliff Swallow *** 4/11 4/23 6/16 6/24 After Jun 30
Western Kingbird *** 4/20 4/26 6/6 6/26 After Jun 30
Eastern Kingbird ****! 4/18 4/30 5/24 6/24 6/26
Cassin's Sparrow * 4/7 5/1 6/13 After Jun 30 -
Painted Bunting ** 4/23 5/1 6/3 6/29 After Jun 30
Dickcissel *** 4/23 5/1 After Jun 30 - -
Red-eyed Vireo *** 4/25 5/2 5/27 6/4 After Jun 30
Scarlet Tanager ** 4/25 5/4 5/20 6/6 6/11
Acadian Flycatcher ** 5/1 5/5 5/24 5/28 After Jun 30
Bell's Vireo *** 4/26 5/6 6/3 6/9 6/28
Orchard Oriole *** 4/29 5/6 6/2 6/8 6/10
Black-headed Grosbeak ** 4/28 5/7 6/4 After Jun 30 -
Lark Bunting ** 4/28 5/9 5/31 6/24 After Jun 30
Mourning Warbler *** 5/6 5/11 5/20 5/27 6/3
Black Tern ****! 5/6 5/12 5/19 5/24 6/22
Bobolink *** 4/30 5/12 6/14 6/23 After Jun 30
Alder Flycatcher *** 5/7 5/13 5/24 6/1 6/6
Willow Flycatcher ** 5/4 5/16 6/13 6/29 After Jun 30
Common Nighthawk *** 4/29 5/22 5/30 6/5 After Jun 30
Yellow-billed Cuckoo *** 5/2 5/24 5/31 After Jun 30 -
Western Wood-Pewee ** 5/15 5/24 6/5 6/17 After Jun 30

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
Gadwall *** 3/11 3/17 3/25 After Jun 30 -
Belted Kingfisher ** 3/2 3/23 4/9 5/20 6/4
Wilson's Snipe * 3/2 4/8 4/17 6/20 After Jun 30
Blue-winged Teal *** 3/11 3/19 4/23 5/23 6/25
Yellow-throated Warbler * 3/17 4/2 4/23 5/20 6/5
Great Blue Heron *** 3/2 3/22 4/24 5/19 After Jun 30
Baird's Sandpiper *** 3/14 3/27 4/24 5/24 6/2
American Avocet ** 4/9 4/17 4/25 6/23 After Jun 30
Semipalmated Plover ** 4/13 4/20 4/25 5/24 6/1
Scissor-tailed Flycatcher * 3/28 4/7 4/25 6/12 After Jun 30
Eared Grebe ** 4/7 4/17 4/26 6/21 After Jun 30
White-faced Ibis ** 4/9 4/18 4/26 5/23 After Jun 30
Lesser Yellowlegs *** 3/29 4/21 4/26 5/22 5/29
Snowy Egret * 4/1 4/12 4/27 6/29 After Jun 30
Wilson's Phalarope *** 4/16 4/21 4/28 5/22 After Jun 30
Broad-winged Hawk ** 4/6 4/20 4/29 5/21 5/27
Long-billed Dowitcher *** 4/17 4/21 5/1 5/20 5/27
Tree Swallow *** 3/24 4/1 5/1 6/25 After Jun 30
Northern Rough-winged Swallow *** 3/30 4/21 5/4 5/21 5/27
Palm Warbler *** 4/24 4/29 5/5 5/24 5/26
Wood Duck *** 3/2 3/24 5/6 5/24 6/7
Purple Martin ** 3/20 4/4 5/7 After Jun 30 -
Brown Thrasher *** 4/2 4/28 5/7 6/9 6/29
Prothonotary Warbler ** 4/6 4/20 5/7 5/21 6/4
Nashville Warbler *** 4/26 4/30 5/7 5/20 5/26
Blue-headed Vireo *** 4/26 4/30 5/9 5/19 5/23
Eastern Towhee *** 3/23 4/26 5/9 5/22 5/31
Rose-breasted Grosbeak *** 4/30 5/5 5/10 5/23 5/26
Indigo Bunting *** 4/26 5/2 5/10 6/5 After Jun 30
Yellow-throated Vireo ** 4/25 5/1 5/11 5/27 After Jun 30
Northern Waterthrush *** 4/28 5/3 5/11 5/23 5/28
Brown-headed Cowbird *** 3/14 4/21 5/11 5/19 6/10
Spotted Sandpiper *** 4/18 4/28 5/12 5/24 6/1
Great Crested Flycatcher *** 4/23 4/30 5/12 6/26 After Jun 30
House Wren *** 4/16 4/28 5/12 5/21 6/9
Gray-cheeked Thrush *** 5/2 5/7 5/12 5/24 5/28
Swainson's Thrush *** 4/28 5/5 5/12 5/23 5/30
Kentucky Warbler ** 4/21 5/2 5/12 5/29 6/5
Baltimore Oriole *** 4/23 4/30 5/12 5/23 6/27
Forster's Tern *** 4/13 4/20 5/13 5/20 After Jun 30
Chimney Swift *** 4/16 4/26 5/13 6/9 6/14
Least Flycatcher *** 4/29 5/5 5/13 5/24 5/28
Wood Thrush *** 4/26 5/2 5/13 5/21 6/3
Wilson's Warbler *** 5/3 5/7 5/13 5/24 5/28
Green Heron ** 4/12 4/23 5/14 6/5 6/11
Least Sandpiper *** 4/18 4/21 5/14 5/21 5/27
Blackpoll Warbler *** 5/3 5/7 5/14 5/25 5/29
Semipalmated Sandpiper *** 4/13 4/21 5/15 5/24 6/2
Red-headed Woodpecker *** 4/28 5/5 5/15 6/4 6/8
Warbling Vireo *** 4/20 4/29 5/15 5/23 After Jun 30
Bank Swallow *** 4/13 4/27 5/15 5/24 After Jun 30
Mississippi Kite * 4/24 5/3 5/16 6/12 6/15
Pectoral Sandpiper *** 3/25 3/28 5/16 5/24 5/30
Ruby-throated Hummingbird *** 4/18 5/1 5/16 5/23 6/12
Philadelphia Vireo *** 4/30 5/6 5/16 5/24 6/1
Ovenbird *** 5/3 5/8 5/16 5/23 5/27
Yellow Warbler *** 4/29 5/4 5/16 5/24 5/28
Sora * 4/10 4/17 5/17 6/21 After Jun 30
Stilt Sandpiper *** 5/7 5/13 5/17 5/23 5/27
Eastern Wood-Pewee *** 5/1 5/8 5/17 6/25 After Jun 30
Gray Catbird *** 4/29 5/5 5/17 5/24 5/29
Tennessee Warbler *** 4/29 5/3 5/17 5/24 5/29
White-rumped Sandpiper *** 5/6 5/14 5/18 5/23 6/9
Barn Swallow ** 4/3 4/22 5/18 6/29 After Jun 30
Common Yellowthroat *** 4/25 5/3 5/18 6/24 6/29
American Redstart *** 5/3 5/10 5/18 5/24 5/28
Magnolia Warbler *** 5/4 5/8 5/18 5/24 5/29
Chestnut-sided Warbler *** 5/3 5/7 5/18 5/25 5/30
Black Tern *** 5/6 5/12 5/19 5/24 6/22
Mourning Warbler *** 5/6 5/11 5/20 5/27 6/3
Scarlet Tanager ** 4/25 5/4 5/20 6/6 6/11
Common Grackle *** 3/2 3/13 5/21 6/11 After Jun 30
White-eyed Vireo * 3/19 4/4 5/23 6/12 After Jun 30
Acadian Flycatcher *** 5/1 5/5 5/24 5/28 After Jun 30
Alder Flycatcher *** 5/7 5/13 5/24 6/1 6/6
Eastern Kingbird ** 4/18 4/30 5/24 6/24 6/26

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Nope!

West

A quiet start to this late period will see scattered light movements mostly in the southern reaches of the West. More intense movements are likely in New Mexico and Colorado on Sunday night, as more favorable conditions for migration persist and intensify in those areas. By Tuesday night, the northern Rockies see action, with moderate flights in and to the east of these mountains. Wednesday sees the migration action return to areas farther south in the Rockies, but also some light to moderate flights scattered across the intermountain region and the Desert Southwest. By Thursday night, the most widespread favorable conditions occur, and despite the late date more widespread light to moderate flights are likely than at any other time during the forecast period. This is still particularly the case for the eastern reaches of the region, primarily to the east of the Rockies.

Eastern Kingbird. Harold Ziolkowski/Macaulay Library. eBird S36911859.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Calliope Hummingbird * 4/19 6/8 6/14 6/25 After Jun 30
Western Wood-Pewee ****! 5/1 5/20 6/6 6/26 After Jun 30
Eastern Kingbird *** 5/7 5/24 5/30 After Jun 30 -
Willow Flycatcher *** 5/15 5/23 6/8 6/13 After Jun 30
Common Nighthawk *** 5/24 5/31 6/17 6/25 6/28

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
White-throated Swift * 3/2 4/3 5/29 After Jun 30 -
Common Yellowthroat *** 3/19 4/7 5/19 6/11 6/16
Brewer's Blackbird ** 3/31 4/15 5/29 After Jun 30 -
Hammond's Flycatcher * 4/10 4/21 6/10 6/25 After Jun 30
Barn Swallow *** 3/30 4/23 5/19 6/1 6/12
Pacific-slope Flycatcher ** 3/16 4/25 5/31 6/22 After Jun 30
Bank Swallow ** 4/12 4/25 5/19 5/31 6/8
Cliff Swallow *** 3/19 4/26 6/19 After Jun 30 -
Olive-sided Flycatcher *** 4/17 5/1 6/3 6/17 6/27
Warbling Vireo *** 4/19 5/1 6/3 6/25 After Jun 30
House Wren *** 4/18 5/1 5/24 6/17 6/22
Western Tanager *** 4/22 5/4 5/21 5/31 6/9
Black-headed Grosbeak *** 4/22 5/4 5/23 6/5 6/26
Dusky Flycatcher * 4/17 5/6 6/9 6/25 After Jun 30
Yellow Warbler *** 4/30 5/6 5/23 5/31 6/4
Yellow-breasted Chat ** 4/17 5/6 5/25 6/16 6/23
MacGillivray's Warbler *** 4/24 5/7 5/23 6/15 6/18
Swainson's Thrush ** 4/28 5/10 After Jun 30 - -
Cedar Waxwing *** 5/3 5/14 6/1 6/10 6/16
Western Wood-Pewee *** 5/1 5/20 6/6 6/26 After Jun 30
Willow Flycatcher *** 5/15 5/23 6/8 6/13 After Jun 30
Eastern Kingbird *** 5/7 5/24 5/30 After Jun 30 -

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Broad-billed Hummingbird * 3/2 3/14 3/28 6/1 6/6
Gadwall ** 3/9 3/23 4/13 5/19 After Jun 30
Swainson's Hawk * 3/28 4/8 5/1 5/31 6/5
Hermit Warbler * 4/13 4/24 5/7 After Jun 30 -
Ash-throated Flycatcher * 4/5 4/14 5/8 6/9 6/19
Northern Rough-winged Swallow *** 3/2 4/23 5/8 5/29 After Jun 30
Forster's Tern * 4/11 4/24 5/9 5/19 6/11
Cassin's Vireo * 3/28 4/18 5/9 After Jun 30 -
Townsend's Warbler *** 4/20 4/25 5/9 5/19 6/3
Green Heron * 4/3 4/21 5/10 5/28 6/8
Wilson's Warbler *** 4/12 4/24 5/10 6/1 6/6
Tree Swallow ** 3/2 4/2 5/12 5/29 6/11
Spotted Sandpiper *** 4/22 5/2 5/13 5/27 6/3
Wilson's Phalarope *** 4/26 4/29 5/14 5/20 6/2
Chipping Sparrow *** 4/10 5/6 5/14 5/21 5/26
Yellow-headed Blackbird ** 4/1 4/10 5/14 5/30 6/3
Red-necked Phalarope ** 4/21 4/25 5/15 5/27 6/1
Western Kingbird *** 3/19 4/30 5/15 6/4 6/10
Lazuli Bunting ** 4/12 4/25 5/16 After Jun 30 -
Black-chinned Hummingbird ** 3/16 4/6 5/17 5/30 6/10
Brown-headed Cowbird *** 4/11 5/3 5/17 6/1 6/20
Bullock's Oriole *** 4/30 5/5 5/17 6/3 6/25
Violet-green Swallow * 3/2 3/17 5/18 5/24 5/29
Bank Swallow * 4/12 4/25 5/19 5/31 6/8
Barn Swallow *** 3/30 4/23 5/19 6/1 6/12
Common Yellowthroat * 3/19 4/7 5/19 6/11 6/16
Western Tanager *** 4/22 5/4 5/21 5/31 6/9
MacGillivray's Warbler * 4/24 5/7 5/23 6/15 6/18
Yellow Warbler *** 4/30 5/6 5/23 5/31 6/4
Black-headed Grosbeak *** 4/22 5/4 5/23 6/5 6/26
House Wren * 4/18 5/1 5/24 6/17 6/22
Yellow-breasted Chat * 4/17 5/6 5/25 6/16 6/23

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Pied-billed Grebe ** - - Before Mar 1 4/20 5/31
White-crowned Sparrow *** 3/20 3/27 4/11 4/26 5/23
Lesser Scaup ** 3/2 3/11 3/15 4/27 5/21
Bufflehead *** - - Before Mar 1 4/28 5/19
Osprey * 3/22 4/4 4/21 4/30 5/23
American Coot *** - - Before Mar 1 4/30 6/4
Surf Scoter ** 3/15 3/18 3/21 5/3 5/21
Sharp-shinned Hawk * 4/7 4/10 4/13 5/3 5/20
Northern Shoveler *** 3/20 3/25 4/8 5/5 6/2
Greater Scaup * - - Before Mar 1 5/5 5/21
Savannah Sparrow ** 3/26 4/8 4/25 5/5 5/19
Rufous Hummingbird * 3/2 3/19 4/8 5/6 5/20
Black-bellied Plover * 4/6 4/10 4/23 5/7 5/27
Nashville Warbler * 3/30 4/15 4/27 5/7 6/26
Black-throated Gray Warbler ** 3/27 4/13 4/27 5/7 6/10
Cinnamon Teal *** 3/2 4/7 4/19 5/8 6/6
Eared Grebe ** 3/27 4/9 4/21 5/8 6/1
Whimbrel ** 3/16 4/18 4/29 5/8 5/21
Long-billed Dowitcher *** 4/22 4/28 5/3 5/9 5/24
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
Vaux's Swift ** 4/12 4/23 5/8 5/12 5/21
Cooper's Hawk ** 3/2 3/14 3/29 5/14 5/26
Orange-crowned Warbler *** 3/20 4/4 5/1 5/15 5/22
Hooded Oriole * 3/12 3/26 4/28 5/15 6/14
Ruddy Duck *** - - Before Mar 1 5/17 6/3
Green-tailed Towhee *** 4/19 4/23 5/11 5/17 5/22
Yellow-rumped Warbler *** 4/2 4/14 4/19 5/18 5/28
Gadwall ** 3/9 3/23 4/13 5/19 After Jun 30
Forster's Tern * 4/11 4/24 5/9 5/19 6/11
Townsend's Warbler *** 4/20 4/25 5/9 5/19 6/3
Wilson's Phalarope *** 4/26 4/29 5/14 5/20 6/2
Chipping Sparrow *** 4/10 5/6 5/14 5/21 5/26
Violet-green Swallow * 3/2 3/17 5/18 5/24 5/29

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