Regional Migration Forecast: 28 April – 5 May 2017

Wilson’s Warbler. Isaac Denzer/Macaulay Library. eBird S36183069.

Continental Summary

Conditions are mostly marginal for scattered light to moderate flights of Long-billed Dowitcher, Wilson’s Phalarope, Western Wood-Pewee, Swainson’s Thrush, Yellow Warbler, Western Tanager, and Bullock’s Oriole after a strong frontal passage in the West, while the first half of the period in the East see many areas with favorable conditions for moderate to very heavy flights featuring Short-billed Dowitcher, Black Tern, Common Nighthawk, Willow Flycatcher, Least Flycatcher, American Redstart, and Wilson’s Warbler. Conditions for trans-Gulf migration will be generally favorable during the period, with the potential for late weekend and early work week fallouts and concentrations in the Gulf Coast states as frontal passages with precipitation are forecast.

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 conditions for moderate to very heavy migration are scattered across the region for the first half of the period before a significant cold front passes through the region. Prior to the arrival of this cold front, areas of smaller disturbances will disrupt these movements, shutting down flights where precipitation and unfavorable winds occur. These disturbances also provide an opportunity to look for downed migrants in concentrations and local fallouts, so watch the overlap of favorable conditions and precipitation carefully. After the passage of this front, migration intensity and extent will be greatly reduced in the region, with perhaps the Upper Midwest experiencing a return to favorable conditions to end the work week. Note, the strong low pressure system departing the region late in the week will create onshore winds in the coastal mid Atlantic and in New England, and birders should watch this system carefully for possible pelagic and southern vagrants. BirdCast will update on this possibility as the date grows closer.

Cape May Warbler. Zach Millen/MacaulayLibrary. eBird S36150580.

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
House Wren ****! 4/18 4/29 5/10 5/15 5/26
Grasshopper Sparrow ** 4/19 4/30 6/10 After Jun 30 -
Red-headed Woodpecker *** 4/20 4/29 5/8 5/13 6/18
Spotted Sandpiper ****! 4/22 4/28 5/16 5/28 6/2
Orchard Oriole *** 4/22 4/28 5/12 5/26 5/29
Solitary Sandpiper *** 4/23 4/30 5/7 5/17 5/23
Yellow-throated Vireo *** 4/23 5/3 5/11 5/22 6/19
Sedge Wren * 4/23 5/4 6/10 6/29 After Jun 30
Northern Waterthrush ****! 4/24 4/30 5/11 5/20 5/27
Blue-winged Warbler ****! 4/24 4/30 5/7 5/12 6/27
Black-and-white Warbler ****! 4/24 5/2 5/9 5/17 5/25
Yellow Warbler ****! 4/24 4/30 5/14 5/31 6/26
Great Crested Flycatcher ****! 4/25 5/3 5/22 6/12 6/27
Eastern Kingbird ****! 4/25 5/5 5/21 6/1 6/11
Warbling Vireo ****! 4/25 5/2 5/18 5/24 6/25
Marsh Wren *** 4/25 5/3 5/23 5/30 6/2
Wood Thrush ****! 4/25 4/30 5/12 5/24 6/1
Black-throated Green Warbler ****! 4/25 5/1 5/10 5/16 5/26
Gray Catbird ****! 4/26 4/30 5/13 5/24 6/2
Ovenbird ****! 4/26 5/2 5/11 5/16 5/31
Orange-crowned Warbler *** 4/26 4/30 5/8 5/19 5/24
Ruby-throated Hummingbird ****! 4/27 5/7 5/22 5/31 6/5
Nashville Warbler ****! 4/27 5/1 5/8 5/19 5/24
Common Yellowthroat ****! 4/27 5/5 5/20 5/25 6/2
Clay-colored Sparrow *** 4/27 5/1 5/19 5/27 After Jun 30
White-crowned Sparrow ****! 4/27 4/30 5/8 5/19 5/23
Rose-breasted Grosbeak ****! 4/27 5/1 5/10 5/22 5/27
Indigo Bunting ****! 4/27 5/6 6/22 6/25 After Jun 30
Least Sandpiper *** 4/28 5/7 5/16 5/26 6/2
Acadian Flycatcher *** 4/28 5/6 6/2 6/16 After Jun 30
Northern Parula ****! 4/28 5/6 5/11 5/17 5/25
Black-throated Blue Warbler ****! 4/28 5/6 5/11 5/16 5/24
Lincoln's Sparrow *** 4/28 5/6 5/10 5/20 5/26
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
Least Flycatcher ****! 4/29 5/5 5/13 5/24 5/31
Veery ****! 4/29 5/5 5/15 5/31 6/3
Blackburnian Warbler ****! 4/29 5/7 5/13 5/24 5/31
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
Golden-winged Warbler *** 5/1 5/6 5/11 5/19 5/24
American Redstart ****! 5/1 5/7 5/16 5/24 6/4
Black-billed Cuckoo *** 5/2 5/10 5/26 6/3 6/11
Tennessee Warbler ****! 5/2 5/8 5/15 5/23 5/27
Chestnut-sided Warbler ****! 5/2 5/7 5/14 5/24 6/1
Common Tern *** 5/3 5/8 5/18 6/1 6/5
Cape May Warbler ****! 5/3 5/7 5/12 5/19 5/22
Magnolia Warbler ****! 5/3 5/7 5/15 5/23 5/29
Semipalmated Plover *** 5/4 5/8 5/22 5/31 6/5
Eastern Wood-Pewee ****! 5/4 5/11 5/27 6/1 6/26
Gray-cheeked Thrush *** 5/4 5/8 5/15 5/22 5/31
Swainson's Thrush ****! 5/4 5/8 5/14 5/24 5/31
Dunlin *** 5/5 5/8 5/21 5/29 6/4
Short-billed Dowitcher *** 5/5 5/11 5/17 5/28 6/2
Black Tern *** 5/5 5/10 5/18 5/25 6/25
Common Nighthawk *** 5/5 5/8 5/21 5/31 6/3
Philadelphia Vireo *** 5/5 5/9 5/19 5/26 5/31
Bay-breasted Warbler ****! 5/5 5/9 5/14 5/21 5/28
Wilson's Warbler ****! 5/5 5/9 5/16 5/26 5/31

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
Great Egret *** 3/23 3/31 5/12 5/29 6/3
Tree Swallow *** 3/28 4/1 5/7 6/24 6/26
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
Caspian Tern ** 4/1 4/9 4/28 5/20 6/4
Field Sparrow *** 3/30 4/9 4/28 5/9 6/18
Purple Martin ** 3/29 4/11 5/17 6/1 6/8
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
Savannah Sparrow *** 4/4 4/13 5/6 5/24 6/21
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
White-eyed Vireo *** 4/11 4/23 5/4 5/13 5/21
Barn Swallow *** 4/5 4/24 5/19 5/29 6/6
Yellow-rumped Warbler ****! 4/8 4/24 5/5 5/18 5/23
Cliff Swallow ** 4/16 4/25 5/17 5/27 5/31
Kentucky Warbler ** 4/20 4/25 5/9 6/28 After Jun 30
Palm Warbler *** 4/3 4/25 5/4 5/19 5/23
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
Chimney Swift *** 4/19 4/27 5/19 6/4 6/18
Bank Swallow *** 4/18 4/27 5/16 5/27 6/5
Yellow-breasted Chat * 4/22 4/27 6/12 After Jun 30 -
Summer Tanager *** 4/20 4/27 5/8 5/18 5/22
Spotted Sandpiper *** 4/22 4/28 5/16 5/28 6/2
Orchard Oriole *** 4/22 4/28 5/12 5/26 5/29
Red-headed Woodpecker ** 4/20 4/29 5/8 5/13 6/18
House Wren ****! 4/18 4/29 5/10 5/15 5/26
Solitary Sandpiper *** 4/23 4/30 5/7 5/17 5/23
Wood Thrush ****! 4/25 4/30 5/12 5/24 6/1
Gray Catbird ****! 4/26 4/30 5/13 5/24 6/2
Northern Waterthrush *** 4/24 4/30 5/11 5/20 5/27
Blue-winged Warbler *** 4/24 4/30 5/7 5/12 6/27
Orange-crowned Warbler *** 4/26 4/30 5/8 5/19 5/24
Yellow Warbler ****! 4/24 4/30 5/14 5/31 6/26
Grasshopper Sparrow ** 4/19 4/30 6/10 After Jun 30 -
White-crowned Sparrow ****! 4/27 4/30 5/8 5/19 5/23
Nashville Warbler ****! 4/27 5/1 5/8 5/19 5/24
Black-throated Green Warbler ****! 4/25 5/1 5/10 5/16 5/26
Clay-colored Sparrow * 4/27 5/1 5/19 5/27 After Jun 30
Rose-breasted Grosbeak ****! 4/27 5/1 5/10 5/22 5/27
Warbling Vireo *** 4/25 5/2 5/18 5/24 6/25
Ovenbird ****! 4/26 5/2 5/11 5/16 5/31
Black-and-white Warbler ****! 4/24 5/2 5/9 5/17 5/25
Great Crested Flycatcher ****! 4/25 5/3 5/22 6/12 6/27
Yellow-throated Vireo *** 4/23 5/3 5/11 5/22 6/19
Marsh Wren ** 4/25 5/3 5/23 5/30 6/2
Baltimore Oriole ****! 4/28 5/3 5/12 5/24 6/26
Sedge Wren * 4/23 5/4 6/10 6/29 After Jun 30
Least Flycatcher *** 4/29 5/5 5/13 5/24 5/31
Eastern Kingbird ****! 4/25 5/5 5/21 6/1 6/11
Veery ****! 4/29 5/5 5/15 5/31 6/3
Common Yellowthroat ****! 4/27 5/5 5/20 5/25 6/2

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
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
Northern Harrier ** 3/18 3/28 4/6 4/28 5/9
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
Song Sparrow ** 3/7 3/13 4/10 5/10 6/24
Wilson's Snipe *** 3/10 4/4 4/13 4/29 5/10
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
Ruby-crowned Kinglet *** 4/6 4/11 4/24 5/8 5/13
Pine Warbler *** 3/31 4/9 4/24 5/8 5/15
Purple Finch *** 4/1 4/13 4/25 5/4 5/11
Sharp-shinned Hawk ** 3/27 4/10 4/26 5/7 5/17
Cooper's Hawk ** 3/15 4/6 4/26 5/11 5/25
Broad-winged Hawk *** 4/9 4/14 4/26 5/6 5/10
Greater Yellowlegs *** 3/25 4/13 4/26 5/19 5/29
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
Field Sparrow *** 3/30 4/9 4/28 5/9 6/18
White-throated Sparrow *** 4/8 4/17 4/28 5/9 5/18
Louisiana Waterthrush ** 3/29 4/6 4/30 5/14 6/17
Northern Rough-winged Swallow *** 3/31 4/16 5/1 5/20 5/29
Brown Thrasher *** 4/4 4/11 5/1 5/9 5/13
Swamp Sparrow *** 4/3 4/11 5/2 5/9 5/25
Eastern Towhee *** 4/3 4/15 5/2 5/9 5/16
Chipping Sparrow *** 4/1 4/11 5/3 5/10 5/14
Brown-headed Cowbird *** 3/11 4/6 5/3 5/11 After Jun 30
Lesser Yellowlegs *** 3/28 4/14 5/4 5/18 5/26
White-eyed Vireo *** 4/11 4/23 5/4 5/13 5/21
Blue-gray Gnatcatcher *** 4/5 4/16 5/4 5/11 5/29
Palm Warbler *** 4/3 4/25 5/4 5/19 5/23
Blue-headed Vireo *** 4/18 4/26 5/5 5/14 5/21
Yellow-rumped Warbler *** 4/8 4/24 5/5 5/18 5/23

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
Redhead ** 3/2 3/3 3/11 4/1 4/30
Gadwall *** 3/2 3/9 3/20 4/8 5/4
Greater Scaup ** - - Before Mar 1 4/8 5/2
Ring-billed Gull *** 3/2 3/6 3/12 4/8 4/28
Killdeer * 3/2 3/8 4/1 4/9 6/5
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
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
Common Loon ** 3/17 3/26 4/12 4/22 6/4
Brown Creeper *** 3/29 4/3 4/10 4/23 5/8
Winter Wren ** 3/29 4/4 4/13 4/23 5/11
Dark-eyed Junco *** 3/12 3/14 4/5 4/24 5/2
Northern Shoveler *** 3/2 3/9 4/3 4/28 5/8
Pied-billed Grebe *** 3/8 3/20 4/10 4/28 5/7
Northern Harrier ** 3/18 3/28 4/6 4/28 5/9
Ruddy Duck *** 3/2 3/10 4/1 4/29 5/8
American Coot *** 3/2 3/7 4/4 4/29 5/21
Wilson's Snipe *** 3/10 4/4 4/13 4/29 5/10
American Kestrel *** 3/17 3/27 4/10 4/29 5/9
Blue-winged Teal *** 3/14 3/31 4/19 4/30 5/10
Green-winged Teal *** 3/2 3/10 4/2 4/30 5/11
Osprey *** 3/15 4/1 4/20 5/1 5/8
Yellow-throated Warbler ** 4/1 4/8 4/26 5/2 5/19
Rusty Blackbird *** 3/7 3/11 4/9 5/4 5/11
Purple Finch *** 4/1 4/13 4/25 5/4 5/11

Gulf Coast and Southeast

Moderate to very heavy migration will be the norm for Friday and Saturday across the region. By Sunday a strong frontal boundary approaches and then crosses into the Gulf of Mexico, bringing the potential for more fallout and concentration conditions. The western Gulf will experience these conditions first on Sunday and Monday, and gradually the potential shifts east with the passage of the front late Monday and Tuesday. Moderate to heavy flights return post frontal passage by Wednesday, but a disturbance forming in Texas becomes a player in the migration game will some new potential to disrupt the system. The disturbance is forecast to intensify by Wednesday and Thursday, and the potential for trans-Gulf migrants to interact with this intensification means a new round of opportunities to watch for fallouts, particularly for the central and eastern Gulf coast. As this new system continues to intensify and move east, fallout potential follows suit, particularly in Peninsula Florida. The period ends with general unfavorable conditions in source areas for migrants, and unfavorable conditions in the Gulf Coast states as well, suggesting locally moderate movements rather than broad scale heavy flights characteristic of recent days. Note, Tuesday and Friday systems have potential to sweep migrants offshore in Florida, a scenario BirdCast will revisit in the days to come.

White-rumped Sandpiper. Jonathan Hiley/Macaulay Library. eBird S36109118.

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Yellow-billed Cuckoo *** 4/11 5/9 6/6 6/12 After Jun 30
American Redstart *** 4/13 4/29 5/10 5/16 5/23
Canada Warbler ** 4/13 5/7 5/13 5/20 5/25
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
American Robin *** 4/23 4/28 5/7 5/23 After Jun 30
Least Flycatcher *** 4/24 4/30 5/12 5/19 5/23
Mourning Warbler ** 4/24 5/9 5/13 5/20 5/26

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
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
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
Scissor-tailed Flycatcher *** 3/16 3/26 5/12 5/30 After Jun 30
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
Cliff Swallow *** 3/12 4/4 5/12 5/20 6/17
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
Green Heron *** 3/26 4/10 4/28 5/18 5/22
Warbling Vireo ** 4/5 4/13 5/2 5/17 5/23
Stilt Sandpiper * 3/16 4/14 4/30 5/19 5/26
Black-throated Green Warbler *** 4/9 4/14 4/29 5/15 5/22
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
Northern Waterthrush *** 4/12 4/16 4/28 5/15 5/21
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
Ovenbird *** 4/11 4/17 4/29 5/9 After Jun 30
Rose-breasted Grosbeak ****! 4/12 4/17 4/28 5/5 5/16
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
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
Wilson's Phalarope *** 4/14 4/21 5/4 5/18 5/26
Painted Bunting *** 4/11 4/21 4/29 After Jun 30 -
Least Sandpiper ** 4/13 4/22 5/2 5/18 5/24
Spotted Sandpiper *** 4/12 4/22 5/5 5/20 5/26
Acadian Flycatcher ** 4/13 4/23 6/5 6/16 After Jun 30
Clay-colored Sparrow ** 4/12 4/23 4/29 5/11 5/17
Dickcissel *** 4/18 4/23 5/1 5/21 5/26
Mississippi Kite *** 4/17 4/24 5/7 5/22 5/26
Eastern Wood-Pewee *** 4/14 4/24 5/12 5/22 5/26
Golden-winged Warbler ** 4/13 4/24 4/29 5/5 5/15
Yellow Warbler *** 4/14 4/25 5/1 5/17 5/22
Bobolink *** 4/18 4/25 5/4 5/8 5/21
Eastern Phoebe *** 4/23 4/26 5/8 After Jun 30 -
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
Philadelphia Vireo *** 4/23 4/27 5/1 5/16 5/20
Bay-breasted Warbler *** 4/22 4/27 5/1 5/16 5/18
American Robin *** 4/23 4/28 5/7 5/23 After Jun 30
American Redstart *** 4/13 4/29 5/10 5/16 5/23
White-rumped Sandpiper *** 4/21 4/30 5/14 5/20 6/13
Least Flycatcher *** 4/24 4/30 5/12 5/19 5/23
Wilson's Warbler *** 4/20 4/30 5/11 5/19 5/23

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
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
Common Gallinule * - 3/2 3/9 5/1 5/9
Swamp Sparrow ** 3/2 3/6 3/10 4/28 5/6
Savannah Sparrow *** 3/7 3/9 3/13 5/10 5/18
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
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
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
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
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
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
Northern Parula *** 3/2 3/15 4/18 5/10 6/25
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 -
Sora *** 3/7 4/9 4/22 5/1 5/15
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
Long-billed Dowitcher *** 3/2 4/13 4/23 5/5 5/15
Least Tern *** 3/27 4/12 4/23 4/30 5/6
Brown-crested Flycatcher * 3/31 4/17 4/23 5/31 6/4
Black-bellied Whistling-Duck ** 3/8 3/17 4/24 5/2 5/7
Fulvous Whistling-Duck * 4/1 4/13 4/24 5/3 5/9
Least Bittern * 4/8 4/14 4/24 5/3 5/9
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
Scarlet Tanager *** 4/11 4/16 4/24 5/7 5/12
White-faced Ibis *** 3/23 4/14 4/25 5/3 5/8
Semipalmated Plover ** 4/8 4/15 4/25 5/29 6/6
Whimbrel ** 4/5 4/11 4/25 5/4 6/1
Lesser Yellowlegs *** 3/7 4/13 4/25 5/7 5/24
White-crowned Sparrow *** 4/12 4/18 4/25 5/7 5/14
Summer Tanager *** 4/3 4/15 4/25 4/30 5/17
Solitary Sandpiper *** 4/1 4/15 4/26 5/9 5/19
Ruby-throated Hummingbird *** 3/15 4/6 4/26 5/17 5/23
Gray-cheeked Thrush ** 4/15 4/20 4/26 5/16 5/21
Wood Thrush *** 4/12 4/17 4/26 5/8 6/20
Nashville Warbler *** 4/5 4/13 4/26 5/8 5/19
Orchard Oriole *** 3/31 4/13 4/26 5/17 6/19
Gray Catbird *** 4/12 4/17 4/27 5/8 5/17
Black-and-white Warbler *** 3/7 4/17 4/27 5/7 5/17
Tennessee Warbler *** 4/10 4/14 4/27 5/15 5/19
Blue Grosbeak * 4/7 4/17 4/27 6/21 6/24
Indigo Bunting *** 4/3 4/16 4/27 5/10 6/23
Bronzed Cowbird * 4/2 4/13 4/27 5/31 6/4
Baltimore Oriole *** 4/10 4/14 4/27 5/5 5/19
Green Heron * 3/26 4/10 4/28 5/18 5/22
Pectoral Sandpiper ** 3/2 3/23 4/28 5/18 5/28
Bell's Vireo * 4/5 4/17 4/28 6/1 6/9
Northern Waterthrush *** 4/12 4/16 4/28 5/15 5/21
Rose-breasted Grosbeak *** 4/12 4/17 4/28 5/5 5/16
Eastern Kingbird *** 3/27 4/8 4/29 5/18 5/24
Ovenbird *** 4/11 4/17 4/29 5/9 After Jun 30
Golden-winged Warbler ** 4/13 4/24 4/29 5/5 5/15
Black-throated Green Warbler *** 4/9 4/14 4/29 5/15 5/22
Clay-colored Sparrow *** 4/12 4/23 4/29 5/11 5/17
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
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
Northern Rough-winged Swallow *** 3/2 3/22 5/1 5/12 After Jun 30
Bay-breasted Warbler *** 4/22 4/27 5/1 5/16 5/18
Yellow Warbler *** 4/14 4/25 5/1 5/17 5/22
Lark Sparrow * 3/16 4/6 5/1 5/29 After Jun 30
Dickcissel *** 4/18 4/23 5/1 5/21 5/26
Least Sandpiper *** 4/13 4/22 5/2 5/18 5/24
Warbling Vireo ** 4/5 4/13 5/2 5/17 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
Veery *** 4/15 4/20 5/2 5/8 5/20
Common Yellowthroat *** 4/5 4/15 5/2 5/16 5/24
Baird's Sandpiper * 3/9 3/29 5/3 5/19 5/28
Chestnut-sided Warbler *** 4/22 4/26 5/3 5/16 5/21
Wilson's Phalarope *** 4/14 4/21 5/4 5/18 5/26
Black-chinned Hummingbird * 3/2 3/17 5/4 5/24 6/2
Swainson's Thrush *** 4/13 4/17 5/4 5/17 5/23
Blackpoll Warbler *** 4/15 4/19 5/4 5/11 5/22
Bobolink *** 4/18 4/25 5/4 5/8 5/21
Spotted Sandpiper *** 4/12 4/22 5/5 5/20 5/26

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
Tree Swallow *** 3/17 3/22 3/25 3/31 5/24
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-rumped Warbler *** 3/2 3/4 3/7 4/1 5/13
Wilson's Snipe ** 3/5 3/6 3/8 4/5 5/5
Common Loon ** 3/18 3/22 3/27 4/7 5/2
Double-crested Cormorant *** 3/2 3/7 3/10 4/9 5/8
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
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
Northern Harrier *** - - Before Mar 1 4/26 5/8
House Wren ** 3/18 3/27 4/14 4/26 5/18
Prairie Warbler * 3/22 4/3 4/18 4/26 6/18
Osprey *** 3/2 3/7 3/14 4/27 5/3
Northern Shoveler *** - - Before Mar 1 4/28 5/21
Sharp-shinned Hawk * - - Before Mar 1 4/28 5/10
Herring Gull *** - - Before Mar 1 4/28 5/6
Orange-crowned Warbler *** - - Before Mar 1 4/28 5/11
Swamp Sparrow *** 3/2 3/6 3/10 4/28 5/6
Spotted Towhee * 3/2 3/11 3/21 4/28 5/10
American Coot *** - - Before Mar 1 4/29 5/16
Long-billed Curlew * 3/2 3/11 3/16 4/29 5/12
Sedge Wren ** 4/9 4/13 4/18 4/29 5/5
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
White-throated Sparrow *** 3/16 4/7 4/11 4/29 5/9
Brown Pelican *** - 3/2 4/17 4/30 5/6
Willet *** 3/8 4/12 4/19 4/30 5/7
Least Tern *** 3/27 4/12 4/23 4/30 5/6
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
Cerulean Warbler ** 4/3 4/13 4/20 4/30 5/5
Summer Tanager *** 4/3 4/15 4/25 4/30 5/17
Blue-winged Teal *** 3/2 3/22 4/4 5/1 5/23
Sora *** 3/7 4/9 4/22 5/1 5/15
Common Gallinule *** - 3/2 3/9 5/1 5/9
American Golden-Plover * 3/2 3/22 3/29 5/1 5/13
Laughing Gull *** 3/2 4/12 4/20 5/1 5/7
Forster's Tern *** 3/7 3/9 3/16 5/1 5/11
Couch's Kingbird * 3/2 3/12 3/27 5/1 5/30
Black-bellied Whistling-Duck ** 3/8 3/17 4/24 5/2 5/7
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
Franklin's Gull * 3/28 4/5 4/19 5/2 5/23
Gull-billed Tern ** 3/15 4/10 4/18 5/2 5/8
Caspian Tern ** 3/17 4/13 4/19 5/2 5/8
Fulvous Whistling-Duck ** 4/1 4/13 4/24 5/3 5/9
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
Greater Yellowlegs *** 3/2 3/10 4/1 5/3 5/18
Whimbrel ** 4/5 4/11 4/25 5/4 6/1
Short-billed Dowitcher ** 3/13 4/13 4/20 5/4 5/21
American Avocet ** 3/19 4/10 4/19 5/5 5/11
Upland Sandpiper * 3/21 3/28 4/12 5/5 5/12
Long-billed Dowitcher *** 3/2 4/13 4/23 5/5 5/15
Golden-winged Warbler ** 4/13 4/24 4/29 5/5 5/15
Palm Warbler *** - 3/2 3/6 5/5 5/12
Vesper Sparrow * 3/7 3/10 3/15 5/5 5/15
Rose-breasted Grosbeak *** 4/12 4/17 4/28 5/5 5/16
Baltimore Oriole *** 4/10 4/14 4/27 5/5 5/19

Weekly mean spring nocturnal migration activity and direction of movement in the Gulf of Mexico region for the week of 27 April – 3 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

General unfavorable migration conditions are forecast for most of the period. Several disturbances pass through the region, bringing precipitation and unfavorable winds. Migration will be mostly light to moderate, but intensities could be higher if lighter wind or drier conditions than expected occur. The period ends will the arrival of some favorable conditions across much of the region, and moderate to locally very heavy flights will follow their arrival.

Eastern Wood-Pewee. Van Remsen/Macaulay Library. eBird S36229547.

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 Thrasher ****! 4/2 4/28 5/7 6/9 6/29
Grasshopper Sparrow *** 4/5 5/27 After Jun 30 - -
Lincoln's Sparrow *** 4/6 4/28 5/4 5/14 5/21
Cassin's Sparrow * 4/7 5/1 6/13 After Jun 30 -
Marbled Godwit * 4/9 6/5 6/13 6/21 After Jun 30
Yellow-rumped Warbler ****! 4/11 4/28 5/4 5/15 5/23
Black-crowned Night-Heron * 4/12 6/4 6/13 After Jun 30 -
House Wren ****! 4/16 4/28 5/12 5/21 6/9
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-crowned Sparrow ****! 4/19 4/28 5/4 5/14 5/21
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
Great Crested Flycatcher ****! 4/23 4/30 5/12 6/26 After Jun 30
Painted Bunting *** 4/23 5/1 6/3 6/29 After Jun 30
Dickcissel ****! 4/23 5/1 After Jun 30 - -
Baltimore Oriole ****! 4/23 4/30 5/12 5/23 6/27
Mississippi Kite *** 4/24 5/3 5/16 6/12 6/15
Palm Warbler *** 4/24 4/29 5/5 5/24 5/26
Clay-colored Sparrow ****! 4/24 5/1 5/9 5/18 5/24
Yellow-throated Vireo *** 4/25 5/1 5/11 5/27 After Jun 30
Red-eyed Vireo ****! 4/25 5/2 5/27 6/4 After Jun 30
Common Yellowthroat ****! 4/25 5/3 5/18 6/24 6/29
Scarlet Tanager *** 4/25 5/4 5/20 6/6 6/11
Bell's Vireo *** 4/26 5/6 6/3 6/9 6/28
Blue-headed Vireo *** 4/26 4/30 5/9 5/19 5/23
Wood Thrush *** 4/26 5/2 5/13 5/21 6/3
Black-and-white Warbler ****! 4/26 5/3 5/9 5/13 6/5
Nashville Warbler ****! 4/26 4/30 5/7 5/20 5/26
Indigo Bunting ****! 4/26 5/2 5/10 6/5 After Jun 30
Red-headed Woodpecker ****! 4/28 5/5 5/15 6/4 6/8
Sedge Wren * 4/28 6/11 6/14 6/20 6/23
Swainson's Thrush ****! 4/28 5/5 5/12 5/23 5/30
Northern Waterthrush *** 4/28 5/3 5/11 5/23 5/28
Lark Bunting *** 4/28 5/9 5/31 6/24 After Jun 30
Black-headed Grosbeak *** 4/28 5/7 6/4 After Jun 30 -
Common Nighthawk *** 4/29 5/22 5/30 6/5 After Jun 30
Least Flycatcher ****! 4/29 5/5 5/13 5/24 5/28
Gray Catbird ****! 4/29 5/5 5/17 5/24 5/29
Tennessee Warbler ****! 4/29 5/3 5/17 5/24 5/29
Yellow Warbler ****! 4/29 5/4 5/16 5/24 5/28
Orchard Oriole ****! 4/29 5/6 6/2 6/8 6/10
Philadelphia Vireo *** 4/30 5/6 5/16 5/24 6/1
Yellow-breasted Chat *** 4/30 5/29 6/2 6/8 6/11
Rose-breasted Grosbeak ****! 4/30 5/5 5/10 5/23 5/26
Blue Grosbeak *** 4/30 5/30 6/5 6/10 6/13
Bobolink *** 4/30 5/12 6/14 6/23 After Jun 30
Eastern Wood-Pewee ****! 5/1 5/8 5/17 6/25 After Jun 30
Acadian Flycatcher *** 5/1 5/5 5/24 5/28 After Jun 30
Yellow-billed Cuckoo *** 5/2 5/24 5/31 After Jun 30 -
Gray-cheeked Thrush *** 5/2 5/7 5/12 5/24 5/28
Ovenbird *** 5/3 5/8 5/16 5/23 5/27
American Redstart ****! 5/3 5/10 5/18 5/24 5/28
Chestnut-sided Warbler *** 5/3 5/7 5/18 5/25 5/30
Blackpoll Warbler ****! 5/3 5/7 5/14 5/25 5/29
Wilson's Warbler ****! 5/3 5/7 5/13 5/24 5/28
Willow Flycatcher *** 5/4 5/16 6/13 6/29 After Jun 30
Magnolia Warbler *** 5/4 5/8 5/18 5/24 5/29

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
Wood Duck ** 3/2 3/24 5/6 5/24 6/7
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
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
Louisiana Waterthrush ** 3/25 4/2 5/5 5/17 5/22
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
Northern Parula *** 4/1 4/8 5/7 5/18 5/24
Little Blue Heron ** 3/29 4/10 4/29 5/8 5/18
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 -
Sora ** 4/10 4/17 5/17 6/21 After Jun 30
Broad-winged Hawk *** 4/6 4/20 4/29 5/21 5/27
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
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
Willet *** 4/17 4/22 4/29 5/6 After Jun 30
Barn Swallow ****! 4/3 4/22 5/18 6/29 After Jun 30
Green Heron *** 4/12 4/23 5/14 6/5 6/11
Cliff Swallow *** 4/11 4/23 6/16 6/24 After Jun 30
Harris's Sparrow *** 4/17 4/23 5/2 5/13 5/22
Solitary Sandpiper *** 4/16 4/25 5/3 5/11 5/23
White-throated Sparrow *** 4/18 4/25 5/1 5/11 5/23
Chimney Swift *** 4/16 4/26 5/13 6/9 6/14
Western Kingbird *** 4/20 4/26 6/6 6/26 After Jun 30
Chipping Sparrow ****! 3/31 4/26 5/6 5/18 5/27
Eastern Towhee ** 3/23 4/26 5/9 5/22 5/31
Bank Swallow *** 4/13 4/27 5/15 5/24 After Jun 30
Spotted Sandpiper *** 4/18 4/28 5/12 5/24 6/1
House Wren ****! 4/16 4/28 5/12 5/21 6/9
Brown Thrasher ****! 4/2 4/28 5/7 6/9 6/29
Orange-crowned Warbler ****! 4/21 4/28 5/5 5/15 5/22
Yellow-rumped Warbler ****! 4/11 4/28 5/4 5/15 5/23
White-crowned Sparrow ****! 4/19 4/28 5/4 5/14 5/21
Lincoln's Sparrow *** 4/6 4/28 5/4 5/14 5/21
Warbling Vireo ****! 4/20 4/29 5/15 5/23 After Jun 30
Palm Warbler *** 4/24 4/29 5/5 5/24 5/26
Great Crested Flycatcher ****! 4/23 4/30 5/12 6/26 After Jun 30
Eastern Kingbird ****! 4/18 4/30 5/24 6/24 6/26
Blue-headed Vireo *** 4/26 4/30 5/9 5/19 5/23
Nashville Warbler ****! 4/26 4/30 5/7 5/20 5/26
Baltimore Oriole ****! 4/23 4/30 5/12 5/23 6/27
Ruby-throated Hummingbird *** 4/18 5/1 5/16 5/23 6/12
Yellow-throated Vireo *** 4/25 5/1 5/11 5/27 After Jun 30
Cassin's Sparrow * 4/7 5/1 6/13 After Jun 30 -
Clay-colored Sparrow ****! 4/24 5/1 5/9 5/18 5/24
Summer Tanager *** 4/21 5/1 5/10 5/18 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
Wood Thrush *** 4/26 5/2 5/13 5/21 6/3
Kentucky Warbler *** 4/21 5/2 5/12 5/29 6/5
Indigo Bunting ****! 4/26 5/2 5/10 6/5 After Jun 30
Mississippi Kite *** 4/24 5/3 5/16 6/12 6/15
Northern Waterthrush *** 4/28 5/3 5/11 5/23 5/28
Black-and-white Warbler *** 4/26 5/3 5/9 5/13 6/5
Tennessee Warbler ****! 4/29 5/3 5/17 5/24 5/29
Common Yellowthroat ****! 4/25 5/3 5/18 6/24 6/29
Yellow Warbler ****! 4/29 5/4 5/16 5/24 5/28
Scarlet Tanager ** 4/25 5/4 5/20 6/6 6/11
Red-headed Woodpecker *** 4/28 5/5 5/15 6/4 6/8
Acadian Flycatcher ** 5/1 5/5 5/24 5/28 After Jun 30
Least Flycatcher ****! 4/29 5/5 5/13 5/24 5/28
Swainson's Thrush ****! 4/28 5/5 5/12 5/23 5/30
Gray Catbird ****! 4/29 5/5 5/17 5/24 5/29
Rose-breasted Grosbeak ****! 4/30 5/5 5/10 5/23 5/26

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 -
Lesser Scaup *** 3/2 3/17 3/28 4/29 After Jun 30
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
Hermit Thrush ** 3/23 4/2 4/22 5/10 5/18
Vesper Sparrow *** 3/24 3/31 4/22 5/1 5/9
Blue-winged Teal *** 3/11 3/19 4/23 5/23 6/25
Osprey *** 4/6 4/13 4/23 5/5 5/9
Swainson's Hawk *** 3/31 4/9 4/23 5/2 After Jun 30
Hudsonian Godwit *** 4/11 4/17 4/23 4/29 5/26
Franklin's Gull *** 4/2 4/13 4/23 5/1 5/24
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
Great Egret *** 3/24 4/8 4/24 5/8 After Jun 30
Baird's Sandpiper *** 3/14 3/27 4/24 5/24 6/2
Savannah Sparrow *** 3/16 4/17 4/24 5/7 6/23
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
Black-necked Stilt * 4/9 4/17 4/26 5/2 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
Field Sparrow ** 3/12 3/31 4/28 5/11 5/18
Little Blue Heron * 3/29 4/10 4/29 5/8 5/18
Broad-winged Hawk ** 4/6 4/20 4/29 5/21 5/27
Willet *** 4/17 4/22 4/29 5/6 After Jun 30
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
Ruby-crowned Kinglet *** 3/26 4/1 5/1 5/12 5/24
White-throated Sparrow *** 4/18 4/25 5/1 5/11 5/23
Harris's Sparrow *** 4/17 4/23 5/2 5/13 5/22
Solitary Sandpiper *** 4/16 4/25 5/3 5/11 5/23
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
Yellow-rumped Warbler *** 4/11 4/28 5/4 5/15 5/23
White-crowned Sparrow *** 4/19 4/28 5/4 5/14 5/21
Lincoln's Sparrow *** 4/6 4/28 5/4 5/14 5/21
Eastern Phoebe *** 3/2 3/12 5/5 5/18 After Jun 30
Louisiana Waterthrush *** 3/25 4/2 5/5 5/17 5/22
Orange-crowned Warbler *** 4/21 4/28 5/5 5/15 5/22
Palm Warbler *** 4/24 4/29 5/5 5/24 5/26

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
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
Song Sparrow ** 3/12 3/17 3/31 4/11 After Jun 30
Northern Harrier ** 3/2 3/7 3/17 4/26 After Jun 30
American Kestrel *** - 3/2 3/30 4/26 5/5
American Wigeon ** - 3/2 3/24 4/27 After Jun 30
Green-winged Teal *** 3/2 3/13 3/27 4/27 5/8
Sharp-shinned Hawk ** 3/23 3/29 4/5 4/28 5/13
Lesser Scaup *** 3/2 3/17 3/28 4/29 After Jun 30
Double-crested Cormorant *** 3/12 3/28 4/14 4/29 After Jun 30
American White Pelican * 3/13 3/16 4/21 4/29 6/27
Hudsonian Godwit ** 4/11 4/17 4/23 4/29 5/26
Pied-billed Grebe *** 3/16 4/8 4/18 4/30 5/11
American Coot *** 3/14 4/9 4/21 4/30 5/26
Greater Yellowlegs *** 3/12 3/22 4/20 4/30 5/9
Northern Shoveler *** 3/10 3/16 4/14 5/1 After Jun 30
Bonaparte's Gull *** 3/29 4/6 4/18 5/1 5/13
Franklin's Gull *** 4/2 4/13 4/23 5/1 5/24
Vesper Sparrow *** 3/24 3/31 4/22 5/1 5/9
Swainson's Hawk * 3/31 4/9 4/23 5/2 After Jun 30
Black-necked Stilt * 4/9 4/17 4/26 5/2 After Jun 30
Killdeer * 3/2 3/7 3/31 5/2 After Jun 30
Ruddy Duck ** 3/2 3/16 4/6 5/5 After Jun 30
Osprey *** 4/6 4/13 4/23 5/5 5/9

West

Patches of marginal and locally favorable conditions will be scattered across portions of the region for the first half of the period, notably in the Pacific Northwest and northern Rockies and portions of the intermountain West and Desert Southwest. Light to moderate movements are likely to be similarly local and scattered. More favorable migration conditions increase in their extents later in the period, reaching their greatest extent by Thursday night. This night will see the greatest extent of moderate flights, particularly in the eastern portions of the regions in and along the Rockies front.

Western Wood-Pewee. Brandon Miller/Macaulay Library. eBird S36013968.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Western Kingbird *** 3/19 4/30 5/15 6/4 6/10
Chipping Sparrow *** 4/10 5/6 5/14 5/21 5/26
Brown-headed Cowbird ****! 4/11 5/3 5/17 6/1 6/20
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
Long-billed Dowitcher *** 4/22 4/28 5/3 5/9 5/24
Spotted Sandpiper *** 4/22 5/2 5/13 5/27 6/3
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
MacGillivray's Warbler *** 4/24 5/7 5/23 6/15 6/18
Wilson's Phalarope *** 4/26 4/29 5/14 5/20 6/2
Swainson's Thrush *** 4/28 5/10 After Jun 30 - -
Yellow Warbler ****! 4/30 5/6 5/23 5/31 6/4
Bullock's Oriole ****! 4/30 5/5 5/17 6/3 6/25
Western Wood-Pewee ****! 5/1 5/20 6/6 6/26 After Jun 30
Cedar Waxwing *** 5/3 5/14 6/1 6/10 6/16

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 -
Orange-crowned Warbler *** 3/20 4/4 5/1 5/15 5/22
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
Black-chinned Hummingbird *** 3/16 4/6 5/17 5/30 6/10
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
Willet ** 4/7 4/9 4/30 5/6 5/10
Yellow-headed Blackbird ** 4/1 4/10 5/14 5/30 6/3
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
Brewer's Blackbird ** 3/31 4/15 5/29 After Jun 30 -
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
Least Sandpiper *** 4/8 4/22 4/28 5/7 5/15
Semipalmated Plover *** 4/16 4/23 4/30 5/7 5/14
Vaux's Swift ** 4/12 4/23 5/8 5/12 5/21
Northern Rough-winged Swallow ** 3/2 4/23 5/8 5/29 After Jun 30
Barn Swallow *** 3/30 4/23 5/19 6/1 6/12
Green-tailed Towhee ** 4/19 4/23 5/11 5/17 5/22
Forster's Tern ** 4/11 4/24 5/9 5/19 6/11
Hermit Warbler ** 4/13 4/24 5/7 After Jun 30 -
Wilson's Warbler *** 4/12 4/24 5/10 6/1 6/6
Red-necked Phalarope ** 4/21 4/25 5/15 5/27 6/1
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
Townsend's Warbler *** 4/20 4/25 5/9 5/19 6/3
Lazuli Bunting *** 4/12 4/25 5/16 After Jun 30 -
Cliff Swallow *** 3/19 4/26 6/19 After Jun 30 -
Long-billed Dowitcher *** 4/22 4/28 5/3 5/9 5/24
Wilson's Phalarope ** 4/26 4/29 5/14 5/20 6/2
Western Kingbird *** 3/19 4/30 5/15 6/4 6/10
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
Spotted Sandpiper *** 4/22 5/2 5/13 5/27 6/3
Brown-headed Cowbird *** 4/11 5/3 5/17 6/1 6/20
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
Bullock's Oriole *** 4/30 5/5 5/17 6/3 6/25

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
Greater Scaup * - - Before Mar 1 5/5 5/21
Bufflehead *** - - Before Mar 1 4/28 5/19
Ruddy Duck ** - - Before Mar 1 5/17 6/3
Horned Grebe * - - Before Mar 1 5/1 5/12
American Coot ** - - Before Mar 1 4/30 6/4
Ring-necked Duck ** - 3/2 3/10 4/30 5/17
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
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
Greater White-fronted Goose * 4/10 4/15 4/22 5/5 5/14
Black-bellied Plover * 4/6 4/10 4/23 5/7 5/27
Marbled Godwit ** 4/10 4/16 4/25 5/6 5/11
Savannah Sparrow ** 3/26 4/8 4/25 5/5 5/19
Dunlin *** 4/8 4/23 4/27 5/7 5/15
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
Black-necked Stilt ** 3/28 4/6 4/28 5/10 6/4
Least Sandpiper *** 4/8 4/22 4/28 5/7 5/15
Caspian Tern ** 3/25 4/14 4/28 5/6 5/12
Hooded Oriole * 3/12 3/26 4/28 5/15 6/14
American Avocet ** 3/28 4/6 4/29 5/10 6/6
Whimbrel ** 3/16 4/18 4/29 5/8 5/21
Western Sandpiper *** 4/10 4/16 4/29 5/7 5/14
Semipalmated Plover *** 4/16 4/23 4/30 5/7 5/14
Willet *** 4/7 4/9 4/30 5/6 5/10
Swainson's Hawk * 3/28 4/8 5/1 5/31 6/5
Orange-crowned Warbler *** 3/20 4/4 5/1 5/15 5/22
Long-billed Dowitcher *** 4/22 4/28 5/3 5/9 5/24

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
Hooded Merganser ** - - Before Mar 1 4/8 5/2
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
Common Merganser ** - - Before Mar 1 4/22 5/17
Ruby-crowned Kinglet *** - 3/2 3/9 4/25 5/17
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
Golden-crowned Sparrow *** 4/1 4/5 4/15 4/28 5/15
Ring-necked Duck *** - 3/2 3/10 4/30 5/17
Osprey * 3/22 4/4 4/21 4/30 5/23
American Coot *** - - Before Mar 1 4/30 6/4
Brant * 4/10 4/15 4/20 5/1 5/14
Cackling Goose ** - - Before Mar 1 5/1 5/13
Horned Grebe ** - - Before Mar 1 5/1 5/12
Green-winged Teal *** 3/20 3/22 3/26 5/2 5/12
Greater Yellowlegs *** 3/25 4/6 4/16 5/2 5/11
Surf Scoter ** 3/15 3/18 3/21 5/3 5/21
Common Loon ** 3/31 4/12 4/19 5/3 5/12
Sharp-shinned Hawk * 4/7 4/10 4/13 5/3 5/20
Greater White-fronted Goose ** 4/10 4/15 4/22 5/5 5/14
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

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