Regional Migration Forecast: 26 May – 2 June 2017

Henslow’s Sparrow. Carina Pooth/Macaulay Library. eBird S37119332.

Continental Summary

Late season light to moderate flights will occur in widely scattered locations during the forecast period and feature Common Nighthawk, Olive-sided Flycatcher, Eastern Kingbird, Cedar Waxwing, and Brewer’s Sparrow, while the most widespread favorable conditions for moderate to locally heavy flights featuring Yellow-billed Cuckoo, Acadian Flycatcher, Blue Grosbeak, Dickcissel, Grasshopper Sparrow, and Henslow’s Sparrow in the East come during the weekend and end of the period.

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

Patches of locally favorable conditions move through the region for the first half of the period, and locally moderate to heavy flights will be similarly distributed. One of the final large pushes of the spring season is likely on Wednesday night, mostly west of the Appalachians, as more favorable conditions for movements become widespread ahead of an approaching frontal boundary. As this boundary pushes east, so do the favorable conditions, making for an interesting intersection of precipitation and late season migration on Thursday night to the east of the Great Lakes and Ohio River Valley. Birds should watch this intersection carefully, as late season concentrations can produce an interesting array of migrants. Additionally, early June is the season for highly unusual and out of range vagrants, so this system is a perfect chance to get to out to find some evidence.

Dickcissel. Felipe Pimental/Macaulay Library. eBird S37116850.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Dickcissel *** 5/19 5/31 6/15 After Jun 30 -
Henslow's Sparrow ** 5/28 6/2 6/9 6/15 6/26

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Vesper Sparrow * 3/28 4/6 6/11 6/19 6/22
Yellow-breasted Chat * 4/22 4/27 6/12 After Jun 30 -
Grasshopper Sparrow ** 4/19 4/30 6/10 After Jun 30 -
Sedge Wren * 4/23 5/4 6/10 6/29 After Jun 30
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
Yellow-billed Cuckoo *** 4/30 5/8 5/30 6/4 6/18
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
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
Dickcissel ** 5/19 5/31 6/15 After Jun 30 -
Henslow's Sparrow * 5/28 6/2 6/9 6/15 6/26

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
Double-crested Cormorant *** 3/19 4/1 4/20 5/30 6/7
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
Kentucky Warbler * 4/20 4/25 5/9 6/28 After Jun 30
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
Orchard Oriole *** 4/22 4/28 5/12 5/26 5/29
Yellow Warbler *** 4/24 4/30 5/14 5/31 6/26
Veery *** 4/29 5/5 5/15 5/31 6/3
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
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
Common Tern ** 5/3 5/8 5/18 6/1 6/5
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
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
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
Eastern Wood-Pewee *** 5/4 5/11 5/27 6/1 6/26
Red-eyed Vireo *** 4/30 5/9 5/27 6/1 6/5
Alder Flycatcher *** 5/17 5/20 5/29 6/5 6/26
Willow Flycatcher *** 5/11 5/19 5/29 6/16 6/26
Yellow-billed Cuckoo ** 4/30 5/8 5/30 6/4 6/18
Cedar Waxwing * 5/8 5/20 5/31 6/23 6/25
Acadian Flycatcher ** 4/28 5/6 6/2 6/16 After Jun 30

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
Field Sparrow * 3/30 4/9 4/28 5/9 6/18
Song Sparrow * 3/7 3/13 4/10 5/10 6/24
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
Green Heron ** 4/16 4/26 5/9 5/14 6/2
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 Green Warbler *** 4/25 5/1 5/10 5/16 5/26
Lesser Yellowlegs *** 3/28 4/14 5/4 5/18 5/26
Greater Yellowlegs *** 3/25 4/13 4/26 5/19 5/29
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
Bank Swallow ** 4/18 4/27 5/16 5/27 6/5
Cliff Swallow ** 4/16 4/25 5/17 5/27 5/31
Canada Warbler *** 5/8 5/11 5/20 5/27 5/31
Clay-colored Sparrow * 4/27 5/1 5/19 5/27 After Jun 30
Bald Eagle *** 3/5 3/7 3/10 5/28 6/7
Short-billed Dowitcher *** 5/5 5/11 5/17 5/28 6/2
Spotted Sandpiper *** 4/22 4/28 5/16 5/28 6/2
Red-winged Blackbird *** 3/2 3/9 5/6 5/28 6/25
Great Egret *** 3/23 3/31 5/12 5/29 6/3
Black-crowned Night-Heron * 3/27 5/8 5/20 5/29 6/1
Dunlin *** 5/5 5/8 5/21 5/29 6/4
Olive-sided Flycatcher ** 5/8 5/18 5/22 5/29 6/3
Barn Swallow *** 4/5 4/24 5/19 5/29 6/6
Double-crested Cormorant *** 3/19 4/1 4/20 5/30 6/7
Great Blue Heron *** 3/9 3/22 5/12 5/30 6/7
Marsh Wren ** 4/25 5/3 5/23 5/30 6/2
Mourning Warbler *** 5/7 5/18 5/23 5/30 6/2
Semipalmated Plover *** 5/4 5/8 5/22 5/31 6/5
Common Nighthawk *** 5/5 5/8 5/21 5/31 6/3
Ruby-throated Hummingbird *** 4/27 5/7 5/22 5/31 6/5
Veery *** 4/29 5/5 5/15 5/31 6/3
Yellow Warbler *** 4/24 4/30 5/14 5/31 6/26
Common Tern ** 5/3 5/8 5/18 6/1 6/5
Eastern Wood-Pewee *** 5/4 5/11 5/27 6/1 6/26
Yellow-bellied Flycatcher *** 5/17 5/19 5/24 6/1 6/4
Eastern Kingbird *** 4/25 5/5 5/21 6/1 6/11
Red-eyed Vireo *** 4/30 5/9 5/27 6/1 6/5
Purple Martin ** 3/29 4/11 5/17 6/1 6/8

Gulf Coast and Southeast

A weekend of generally favorable conditions will see moderate to locally heavy flights, particularly in the western reaches of the region. Another frontal boundary of the many that have continued to pass through the region this spring arrives by Monday and Tuesday, bringing some potential in the western Gulf of Mexico for late season concentrations. After this frontal boundary dissociates, conditions improve through the remainder of the period for widespread late spring migration season moderate to locally heavy flights.

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
No thank you!

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 -
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
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 -
Brown-crested Flycatcher * 3/31 4/17 4/23 5/31 6/4
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 -
Lark Sparrow * 3/16 4/6 5/1 5/29 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
Scissor-tailed Flycatcher ** 3/16 3/26 5/12 5/30 After Jun 30
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
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
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
Couch's Kingbird * 3/2 3/12 3/27 5/1 5/30
Whimbrel ** 4/5 4/11 4/25 5/4 6/1
Swainson's Hawk * 3/17 3/29 4/18 5/6 6/1
Wood Thrush * 4/12 4/17 4/26 5/8 6/20
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
Northern Rough-winged Swallow ** 3/2 3/22 5/1 5/12 After Jun 30
Olive-sided Flycatcher ** 4/20 5/8 5/12 5/17 6/2
Orchard Oriole ** 3/31 4/13 4/26 5/17 6/19
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
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
Bank Swallow ** 3/31 4/18 5/2 5/19 5/26
Barn Swallow *** 3/10 3/22 5/2 5/19 5/27
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
Cliff Swallow * 3/12 4/4 5/12 5/20 6/17
Mourning Warbler ** 4/24 5/9 5/13 5/20 5/26
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
Semipalmated Plover ** 4/8 4/15 4/25 5/29 6/6
Lark Sparrow * 3/16 4/6 5/1 5/29 After Jun 30
Sanderling *** 3/30 4/13 4/19 5/30 6/7
Western Kingbird *** 4/7 4/20 5/10 5/30 6/2
Scissor-tailed Flycatcher * 3/16 3/26 5/12 5/30 After Jun 30
Semipalmated Sandpiper *** 3/29 4/18 5/14 5/31 6/9
Ash-throated Flycatcher ** 3/15 4/6 5/24 5/31 6/3
Brown-crested Flycatcher * 3/31 4/17 4/23 5/31 6/4
Bronzed Cowbird * 4/2 4/13 4/27 5/31 6/4
Bullock's Oriole * 4/5 4/17 5/24 5/31 After Jun 30
Bell's Vireo * 4/5 4/17 4/28 6/1 6/9

Great Plains

Aside from pockets of locally favorable conditions in the southern Plains, where moderate flights will occur, most of the region will be light to moderate in mostly unfavorable migration conditions. Note that even in these types of conditions, the late date of the season is often associated with occasional larger than expected flights if winds are calmer than forecast. Tuesday night sees the first widespread favorable conditions in the region, and one of the final big pulses of moderate to heavy flights will follow. But the extent of the movements will be greatest on this night, as a frontal boundary shuts down movements in many locations in the days that follow to end the period. Note that some movements during these nights will encounter precipitation, setting up a potential for a late season shorebird concentration or fallout in appropriate open and wetland habitat.

Grasshopper Sparrow. Barbara Paulus/Macaulay Library. eBird S37062084.

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
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
Marsh Wren ** 5/14 6/6 6/15 6/21 6/26

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
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
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
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
Bobolink *** 4/30 5/12 6/14 6/23 After Jun 30
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
Grasshopper Sparrow *** 4/5 5/27 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

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 -
Wilson's Snipe * 3/2 4/8 4/17 6/20 After Jun 30
American Avocet ** 4/9 4/17 4/25 6/23 After Jun 30
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
Snowy Egret * 4/1 4/12 4/27 6/29 After Jun 30
Tree Swallow *** 3/24 4/1 5/1 6/25 After Jun 30
Purple Martin ** 3/20 4/4 5/7 After Jun 30 -
Brown Thrasher *** 4/2 4/28 5/7 6/9 6/29
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
Great Crested Flycatcher *** 4/23 4/30 5/12 6/26 After Jun 30
Kentucky Warbler ** 4/21 5/2 5/12 5/29 6/5
Chimney Swift *** 4/16 4/26 5/13 6/9 6/14
Green Heron ** 4/12 4/23 5/14 6/5 6/11
Red-headed Woodpecker *** 4/28 5/5 5/15 6/4 6/8
Mississippi Kite * 4/24 5/3 5/16 6/12 6/15
Sora * 4/10 4/17 5/17 6/21 After Jun 30
Eastern Wood-Pewee *** 5/1 5/8 5/17 6/25 After Jun 30
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
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
Red-eyed Vireo *** 4/25 5/2 5/27 6/4 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 -
Lark Bunting * 4/28 5/9 5/31 6/24 After Jun 30
Yellow-breasted Chat *** 4/30 5/29 6/2 6/8 6/11
Orchard Oriole *** 4/29 5/6 6/2 6/8 6/10

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Uh no . . .

West

Most of the remaining action for the season will be occurring in the Desert Southwest and eastern reaches of the region. These flights will be most likely on Friday, Tuesday, and Thursday nights, with later dates having increasingly northerly distributions of these flights. Additionally, some of the later week and northern flights may be heavy. More local light and moderate movements will occur elsewhere in the region, particularly in the Four Corners region and Great Basin on Monday and Tuesday nights.

Common Nighthawk. Bill Maynard/Macaulay Library. eBird S37126543.

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
Common Nighthawk *** 5/24 5/31 6/17 6/25 6/28
Fox Sparrow ** 5/28 6/4 6/16 After Jun 30 -
Brewer's Sparrow ** 5/30 6/7 6/13 6/28 After Jun 30

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 -
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
Pacific-slope Flycatcher ** 3/16 4/25 5/31 6/22 After Jun 30
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
Dusky Flycatcher * 4/17 5/6 6/9 6/25 After Jun 30
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 -
Common Nighthawk *** 5/24 5/31 6/17 6/25 6/28

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
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
Cassin's Vireo * 3/28 4/18 5/9 After Jun 30 -
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
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
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
White-throated Swift * 3/2 4/3 5/29 After Jun 30 -
Brewer's Blackbird * 3/31 4/15 5/29 After Jun 30 -
Eastern Kingbird * 5/7 5/24 5/30 After Jun 30 -
Pacific-slope Flycatcher * 3/16 4/25 5/31 6/22 After Jun 30
Cedar Waxwing ** 5/3 5/14 6/1 6/10 6/16

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
American Coot *** - - Before Mar 1 4/30 6/4
Northern Shoveler *** 3/20 3/25 4/8 5/5 6/2
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
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
Cooper's Hawk ** 3/2 3/14 3/29 5/14 5/26
Hooded Oriole * 3/12 3/26 4/28 5/15 6/14
Ruddy Duck *** - - Before Mar 1 5/17 6/3
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
Red-necked Phalarope *** 4/21 4/25 5/15 5/27 6/1
Spotted Sandpiper *** 4/22 5/2 5/13 5/27 6/3
Green Heron * 4/3 4/21 5/10 5/28 6/8
Northern Rough-winged Swallow ** 3/2 4/23 5/8 5/29 After Jun 30
Tree Swallow ** 3/2 4/2 5/12 5/29 6/11
Black-chinned Hummingbird *** 3/16 4/6 5/17 5/30 6/10
Yellow-headed Blackbird *** 4/1 4/10 5/14 5/30 6/3
Swainson's Hawk ** 3/28 4/8 5/1 5/31 6/5
Bank Swallow ** 4/12 4/25 5/19 5/31 6/8
Yellow Warbler *** 4/30 5/6 5/23 5/31 6/4
Western Tanager *** 4/22 5/4 5/21 5/31 6/9
Barn Swallow *** 3/30 4/23 5/19 6/1 6/12
Wilson's Warbler *** 4/12 4/24 5/10 6/1 6/6
Brown-headed Cowbird *** 4/11 5/3 5/17 6/1 6/20
Broad-billed Hummingbird ** 3/2 3/14 3/28 6/1 6/6

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Farnsworth and Van Doren

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