Regional Migration Forecast 21-28 April 2017

Common Yellowthroat. Ryan Schain/Macaulay Library. eBird S14368106.

Continental Summary

The West will see light to moderate flights, particularly in the Desert Southwest late in the weekend and late in the work week, featuring Spotted Sandpiper, Long-billed Dowitcher, Swainson’s Thrush, Townsend’s Warbler, MacGillivray’s Warbler, Black-headed Grosbeak, and Western Tanager, while a pulse of highly favorable migration period late in the period in the East will bring moderate to very heavy flights featuring Red-headed Woodpecker, Acadian Flycatcher, Least Flycatcher, Swainson’s Thrush, Chestnut-sided Warbler, Bay-breasted Warbler, Northern Parula, and Mourning Warbler. Early period brings a dynamic and complex atmosphere will potential for Gulf Coast concentrations, where late period brings a major incursion of Neotropical migrants across and around the Gulf of Mexico, as favorable flight conditions arrive in Mexico and northern Central America at the peak of the season.

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

Locally light to moderate flights will be scattered across the region, mostly in the upper Midwest and northern New England, for the first several days of the period. Scattered precipitation and largely unfavorable winds will keep most migrants grounded. Monday night will see the first pulse of favorable conditions, mostly in the Great Lakes and Midwest, with moderate to heavy flights. These conditions, and associated movements, gradually shift to the east in the days that follow, as a frontal boundary pushes toward the Atlantic. As the period ends, this frontal boundary weakens, allowing more widespread moderate to heavy flights to occur to the south and east of the boundary and shutting down movements to the north and west of the boundary. This late period scenario of a weakening frontal boundary also offers the best opportunities to birds and precipitation to overlap, and the potential for fallouts and concentrations of birds where this happens.

Scarlet Tanager. Andrew Spencer/Macaulay Library. eBird S31309533.

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
Palm Warbler *** 4/3 4/25 5/4 5/19 5/23
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
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
Cliff Swallow *** 4/16 4/25 5/17 5/27 5/31
Blue-headed Vireo *** 4/18 4/26 5/5 5/14 5/21
Bank Swallow *** 4/18 4/27 5/16 5/27 6/5
House Wren ****! 4/18 4/29 5/10 5/15 5/26
Chimney Swift ****! 4/19 4/27 5/19 6/4 6/18
Grasshopper Sparrow ** 4/19 4/30 6/10 After Jun 30 -
Red-headed Woodpecker *** 4/20 4/29 5/8 5/13 6/18
Kentucky Warbler *** 4/20 4/25 5/9 6/28 After Jun 30
Summer Tanager *** 4/20 4/27 5/8 5/18 5/22
Spotted Sandpiper ****! 4/22 4/28 5/16 5/28 6/2
Yellow-breasted Chat *** 4/22 4/27 6/12 After Jun 30 -
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

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
Cooper's Hawk * 3/15 4/6 4/26 5/11 5/25
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
Yellow-throated Warbler ** 4/1 4/8 4/26 5/2 5/19
Caspian Tern ** 4/1 4/9 4/28 5/20 6/4
Pine Warbler *** 3/31 4/9 4/24 5/8 5/15
Field Sparrow *** 3/30 4/9 4/28 5/9 6/18
Sharp-shinned Hawk * 3/27 4/10 4/26 5/7 5/17
Purple Martin ** 3/29 4/11 5/17 6/1 6/8
Ruby-crowned Kinglet ****! 4/6 4/11 4/24 5/8 5/13
Brown Thrasher *** 4/4 4/11 5/1 5/9 5/13
Chipping Sparrow ****! 4/1 4/11 5/3 5/10 5/14
Swamp Sparrow *** 4/3 4/11 5/2 5/9 5/25
Forster's Tern ** 4/1 4/12 5/10 5/22 6/4
Greater Yellowlegs *** 3/25 4/13 4/26 5/19 5/29
Savannah Sparrow *** 4/4 4/13 5/6 5/24 6/21
Purple Finch *** 4/1 4/13 4/25 5/4 5/11
Broad-winged Hawk *** 4/9 4/14 4/26 5/6 5/10
Lesser Yellowlegs *** 3/28 4/14 5/4 5/18 5/26
Eastern Towhee *** 4/3 4/15 5/2 5/9 5/16
Northern Rough-winged Swallow *** 3/31 4/16 5/1 5/20 5/29
Blue-gray Gnatcatcher ****! 4/5 4/16 5/4 5/11 5/29
White-throated Sparrow ****! 4/8 4/17 4/28 5/9 5/18
Sora ** 4/11 4/20 5/8 5/20 5/29
Prothonotary Warbler ** 4/12 4/20 5/11 5/17 5/22
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

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
Dark-eyed Junco *** 3/12 3/14 4/5 4/24 5/2
Northern Harrier ** 3/18 3/28 4/6 4/28 5/9
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
Brown Creeper *** 3/29 4/3 4/10 4/23 5/8
Song Sparrow ** 3/7 3/13 4/10 5/10 6/24
Common Loon *** 3/17 3/26 4/12 4/22 6/4
Wilson's Snipe *** 3/10 4/4 4/13 4/29 5/10
Yellow-bellied Sapsucker *** 3/29 4/3 4/13 4/23 4/27
Winter Wren ** 3/29 4/4 4/13 4/23 5/11
Belted Kingfisher *** 3/28 4/7 4/16 5/6 5/12
Pectoral Sandpiper * 3/20 3/29 4/18 5/23 6/5
Northern Flicker *** 3/30 4/8 4/18 5/9 5/15
Blue-winged Teal *** 3/14 3/31 4/19 4/30 5/10
Hermit Thrush *** 4/2 4/6 4/19 5/7 5/11
Double-crested Cormorant *** 3/19 4/1 4/20 5/30 6/7
Osprey *** 3/15 4/1 4/20 5/1 5/8
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

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
American Wigeon *** 3/2 3/8 3/18 4/9 4/25
Common Merganser *** 3/2 3/4 3/10 4/9 4/23
Killdeer * 3/2 3/8 4/1 4/9 6/5
American Black Duck *** - - Before Mar 1 4/10 4/24
Ring-necked Duck *** 3/2 3/10 3/21 4/10 4/29
Lesser Scaup *** 3/2 3/6 3/25 4/10 5/8
Red-breasted Merganser *** 3/2 3/6 3/21 4/12 5/11
Eastern Phoebe *** 3/12 4/1 4/10 4/14 6/2
Horned Grebe *** 3/2 3/12 3/25 4/15 5/9
Golden-crowned Kinglet *** 3/30 4/3 4/9 4/16 4/24
American Tree Sparrow *** - - Before Mar 1 4/16 5/3
Bufflehead *** 3/2 3/9 3/30 4/17 5/9
Common Redpoll * - - Before Mar 1 4/17 5/3
Bonaparte's Gull *** 3/15 4/1 4/11 4/20 5/5
Fox Sparrow *** 3/10 3/12 4/6 4/20 4/27
Common Loon ** 3/17 3/26 4/12 4/22 6/4
Yellow-bellied Sapsucker *** 3/29 4/3 4/13 4/23 4/27
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

Gulf Coast and Southeast

A prologue: Team BirdCast will try to update forecast information for this region, probably via Twitter, as conditions develop, given the dynamic nature of the atmosphere in the coming days.

Moderate to heavy flights are likely for the first days of the period, as a frontal boundary moves east through the region. The passage of this system will create an interesting, and complex, scenario for inbound Neotropical migrants. In the western Gulf of Mexico, conditions for exodus from the Yucatan and northern Central America are marginal on Friday night; and any of these birds that are aloft over the water will encounter opposing winds by Saturday morning. This is a scenario in which after dark trans-Gulf concentrations or fallouts can occur; late Saturday or Sunday would be the reasonable time frame for the first signs of this on the Texas coast. Note, there is not much precipitation forecast for this section of the Gulf, only change in wind direction. In the eastern Gulf of Mexico, a different scenario may unfold. Precipitation and marginal to favorable migration conditions are forecast, and more typical precipitation related fallouts may be likely, particularly in portions of the Caribbean and Florida on Saturday, Sunday, and even Monday as the frontal boundary finally works its way to the Atlantic. As the front passes, migration will generally shut down over land until the next bout of favorable conditions arrive. Note that the east coast of Florida may see conditions for more intense than usual nocturnal (e.g. flight calling) and diurnal (concentrations) movements on Sunday through Tuesday. Favorable migration conditions return to Texas and Louisiana by Monday night, when moderate to locally heavy exodus will occur. These favorable conditions build across the region, including to Yucatan and northern Central America, and moderate to very heavy flights are likely across much of the region for the latter half of the forecast period.

Mourning Warbler. Melissa James/Macaulay Library. eBird S35915680.

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
Painted Bunting ****! 4/11 4/21 4/29 After Jun 30 -
Spotted Sandpiper *** 4/12 4/22 5/5 5/20 5/26
Clay-colored Sparrow *** 4/12 4/23 4/29 5/11 5/17
Least Sandpiper *** 4/13 4/22 5/2 5/18 5/24
Acadian Flycatcher *** 4/13 4/23 6/5 6/16 After Jun 30
Golden-winged Warbler ** 4/13 4/24 4/29 5/5 5/15
American Redstart *** 4/13 4/29 5/10 5/16 5/23
Blackburnian Warbler *** 4/13 4/26 5/11 5/16 5/21
Canada Warbler ** 4/13 5/7 5/13 5/20 5/25
Wilson's Phalarope *** 4/14 4/21 5/4 5/18 5/26
Eastern Wood-Pewee *** 4/14 4/24 5/12 5/22 5/26
Yellow Warbler *** 4/14 4/25 5/1 5/17 5/22
Mississippi Kite *** 4/17 4/24 5/7 5/22 5/26
Dickcissel ****! 4/18 4/23 5/1 5/21 5/26
Bobolink *** 4/18 4/25 5/4 5/8 5/21
Olive-sided Flycatcher ** 4/20 5/8 5/12 5/17 6/2
Wilson's Warbler *** 4/20 4/30 5/11 5/19 5/23
White-rumped Sandpiper ** 4/21 4/30 5/14 5/20 6/13
Magnolia Warbler ****! 4/21 4/26 5/11 5/16 5/20
Bay-breasted Warbler *** 4/22 4/27 5/1 5/16 5/18
Chestnut-sided Warbler *** 4/22 4/26 5/3 5/16 5/21
Eastern Phoebe *** 4/23 4/26 5/8 After Jun 30 -
Philadelphia Vireo *** 4/23 4/27 5/1 5/16 5/20
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-bellied Whistling-Duck ** 3/8 3/17 4/24 5/2 5/7
Black-necked Stilt *** 3/9 3/17 4/21 5/2 5/9
Black-chinned Hummingbird ** 3/2 3/17 5/4 5/24 6/2
Brown-headed Cowbird *** 3/7 3/18 4/29 5/23 After Jun 30
Northern Rough-winged Swallow ** 3/2 3/22 5/1 5/12 After Jun 30
Purple Martin ** 3/16 3/22 6/22 After Jun 30 -
Barn Swallow *** 3/10 3/22 5/2 5/19 5/27
Pectoral Sandpiper * 3/2 3/23 4/28 5/18 5/28
Yellow-throated Vireo *** 3/13 3/24 4/22 After Jun 30 -
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
Cattle Egret *** 3/18 4/5 4/21 5/2 5/8
Ruby-throated Hummingbird *** 3/15 4/6 4/26 5/17 5/23
Ash-throated Flycatcher * 3/15 4/6 5/24 5/31 6/3
Lark Sparrow ** 3/16 4/6 5/1 5/29 After Jun 30
Eastern Kingbird *** 3/27 4/8 4/29 5/18 5/24
Yellow-crowned Night-Heron * 3/2 4/9 5/1 5/16 5/20
Sora ** 3/7 4/9 4/22 5/1 5/15
Green Heron *** 3/26 4/10 4/28 5/18 5/22
Chuck-will's-widow ** 3/29 4/10 4/24 6/25 After Jun 30
Whimbrel ** 4/5 4/11 4/25 5/4 6/1
Least Tern *** 3/27 4/12 4/23 4/30 5/6
Fulvous Whistling-Duck * 4/1 4/13 4/24 5/3 5/9
Dunlin * 4/9 4/13 4/23 5/25 6/3
Long-billed Dowitcher * 3/2 4/13 4/23 5/5 5/15
Lesser Yellowlegs *** 3/7 4/13 4/25 5/7 5/24
Warbling Vireo ** 4/5 4/13 5/2 5/17 5/23
Nashville Warbler *** 4/5 4/13 4/26 5/8 5/19
Bronzed Cowbird ** 4/2 4/13 4/27 5/31 6/4
Orchard Oriole *** 3/31 4/13 4/26 5/17 6/19
Least Bittern ** 4/8 4/14 4/24 5/3 5/9
White-faced Ibis ** 3/23 4/14 4/25 5/3 5/8
Black-bellied Plover ** 4/9 4/14 4/24 5/20 5/28
Ruddy Turnstone ** 4/8 4/14 4/23 5/24 5/31
Stilt Sandpiper * 3/16 4/14 4/30 5/19 5/26
Tennessee Warbler *** 4/10 4/14 4/27 5/15 5/19
Kentucky Warbler *** 4/3 4/14 4/21 After Jun 30 -
Black-throated Green Warbler *** 4/9 4/14 4/29 5/15 5/22
Baltimore Oriole *** 4/10 4/14 4/27 5/5 5/19
Semipalmated Plover *** 4/8 4/15 4/25 5/29 6/6
Solitary Sandpiper *** 4/1 4/15 4/26 5/9 5/19
Red-eyed Vireo *** 4/1 4/15 5/12 5/24 After Jun 30
Common Yellowthroat *** 4/5 4/15 5/2 5/16 5/24
Summer Tanager ****! 4/3 4/15 4/25 4/30 5/17
Northern Waterthrush *** 4/12 4/16 4/28 5/15 5/21
Scarlet Tanager *** 4/11 4/16 4/24 5/7 5/12
Indigo Bunting ****! 4/3 4/16 4/27 5/10 6/23
Brown-crested Flycatcher ** 3/31 4/17 4/23 5/31 6/4
Bell's Vireo * 4/5 4/17 4/28 6/1 6/9
Swainson's Thrush *** 4/13 4/17 5/4 5/17 5/23
Wood Thrush *** 4/12 4/17 4/26 5/8 6/20
Gray Catbird ****! 4/12 4/17 4/27 5/8 5/17
Ovenbird *** 4/11 4/17 4/29 5/9 After Jun 30
Black-and-white Warbler *** 3/7 4/17 4/27 5/7 5/17
Rose-breasted Grosbeak ****! 4/12 4/17 4/28 5/5 5/16
Blue Grosbeak *** 4/7 4/17 4/27 6/21 6/24
Bullock's Oriole * 4/5 4/17 5/24 5/31 After Jun 30
Semipalmated Sandpiper ** 3/29 4/18 5/14 5/31 6/9
Bank Swallow * 3/31 4/18 5/2 5/19 5/26
Yellow-breasted Chat ** 4/11 4/18 6/7 6/24 After Jun 30
White-crowned Sparrow ** 4/12 4/18 4/25 5/7 5/14
Blackpoll Warbler *** 4/15 4/19 5/4 5/11 5/22
Common Nighthawk *** 4/11 4/20 5/14 6/13 After Jun 30
Great Crested Flycatcher *** 3/28 4/20 5/8 6/9 After Jun 30
Western Kingbird *** 4/7 4/20 5/10 5/30 6/2
Veery *** 4/15 4/20 5/2 5/8 5/20
Gray-cheeked Thrush *** 4/15 4/20 4/26 5/16 5/21
Wilson's Phalarope *** 4/14 4/21 5/4 5/18 5/26
Painted Bunting *** 4/11 4/21 4/29 After Jun 30 -
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

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
Northern Harrier *** - - Before Mar 1 4/26 5/8
Sharp-shinned Hawk * - - Before Mar 1 4/28 5/10
American Coot *** - - Before Mar 1 4/29 5/16
Herring Gull * - - Before Mar 1 4/28 5/6
Orange-crowned Warbler ** - - Before Mar 1 4/28 5/11
Palm Warbler *** - 3/2 3/6 5/5 5/12
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
Osprey *** 3/2 3/7 3/14 4/27 5/3
Vesper Sparrow * 3/7 3/10 3/15 5/5 5/15
Long-billed Curlew * 3/2 3/11 3/16 4/29 5/12
Forster's Tern * 3/7 3/9 3/16 5/1 5/11
Spotted Towhee * 3/2 3/11 3/21 4/28 5/10
Ruby-crowned Kinglet *** 3/2 3/7 3/25 4/21 5/3
Couch's Kingbird * 3/2 3/12 3/27 5/1 5/30
Cedar Waxwing *** 3/2 3/20 3/27 5/22 5/28
American Golden-Plover * 3/2 3/22 3/29 5/1 5/13
Greater Yellowlegs ** 3/2 3/10 4/1 5/3 5/18
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
Yellow-throated Warbler ** 3/2 3/8 4/9 4/25 After Jun 30
White-throated Sparrow *** 3/16 4/7 4/11 4/29 5/9
Upland Sandpiper * 3/21 3/28 4/12 5/5 5/12
Broad-winged Hawk ** 3/19 3/26 4/13 4/24 5/26
Western Sandpiper * 3/2 3/7 4/14 5/22 5/31
House Wren ** 3/18 3/27 4/14 4/26 5/18
White-eyed Vireo ** 3/6 3/22 4/15 6/13 6/26
Lincoln's Sparrow *** 3/2 3/7 4/16 5/8 5/17
Brown Pelican *** - 3/2 4/17 4/30 5/6
Swainson's Hawk ** 3/17 3/29 4/18 5/6 6/1
Gull-billed Tern * 3/15 4/10 4/18 5/2 5/8
Sedge Wren ** 4/9 4/13 4/18 4/29 5/5
Prothonotary Warbler *** 3/25 4/5 4/18 4/22 6/26
Northern Parula *** 3/2 3/15 4/18 5/10 6/25
Prairie Warbler *** 3/22 4/3 4/18 4/26 6/18
American Avocet ** 3/19 4/10 4/19 5/5 5/11
Sanderling ** 3/30 4/13 4/19 5/30 6/7
Willet *** 3/8 4/12 4/19 4/30 5/7
Franklin's Gull * 3/28 4/5 4/19 5/2 5/23
Caspian Tern ** 3/17 4/13 4/19 5/2 5/8
Royal Tern *** 3/2 4/6 4/19 4/30 5/6
Sandwich Tern ** 3/15 4/13 4/19 4/30 5/7
Marsh Wren *** 3/6 4/13 4/19 4/30 5/8
Worm-eating Warbler *** 4/3 4/5 4/19 4/29 5/2
Blue-winged Warbler *** 4/1 4/4 4/19 4/29 5/4
Hooded Warbler *** 3/17 3/24 4/19 4/29 5/10
Short-billed Dowitcher ** 3/13 4/13 4/20 5/4 5/21
Laughing Gull *** 3/2 4/12 4/20 5/1 5/7
Cerulean Warbler ** 4/3 4/13 4/20 4/30 5/5
Cattle Egret *** 3/18 4/5 4/21 5/2 5/8
Black-necked Stilt *** 3/9 3/17 4/21 5/2 5/9
Kentucky Warbler * 4/3 4/14 4/21 After Jun 30 -
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

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
Green-winged Teal *** - - Before Mar 1 4/9 4/23
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

Weekly mean spring nocturnal migration activity and direction of movement in the Gulf of Mexico region for the week of 20-26 April, 1995 to 2015. Circular buffers around radar stations represent migration activity scaled to radar reflectivity (a measure of biological activity), with weekly activity represented by size scaled to the activity at KCRP Corpus Christi and seasonal activity represented by colors scaled to the most intense movements of the spring period (L: light, M: moderate, H:heavy); arrows represent mean track direction (a measure of the direction birds are traveling) derived from radial velocity.

Great Plains

A slow start from the migration perspective comes to the region for the weekend, with local light to moderate flights primarily in northern and central reaches of the region. This changes by Sunday and Monday, when more favorable southerly flow spawns moderate to locally very heavy flights around the region. An arriving disturbance shuts down movements briefly for Tuesday but flights return to the region on Wednesday night; moderate flights will be local in more western portions of the Plains, as the disturbance remains disorganized. Thursday night sees the intensification of a frontal boundary with the in place disturbance; areas to the south and east of the boundary will experience moderate to very heavy flights, whereas areas to the north and west will see little to no movement.

Red-headed Woodpecker. Nancy Christensen/Macaulay Library. eBird S36102616.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Brown-headed Cowbird ****! 3/14 4/21 5/11 5/19 6/10
Eastern Towhee ** 3/23 4/26 5/9 5/22 5/31
Lesser Yellowlegs *** 3/29 4/21 4/26 5/22 5/29
Northern Rough-winged Swallow *** 3/30 4/21 5/4 5/21 5/27
Chipping Sparrow ****! 3/31 4/26 5/6 5/18 5/27
Brown Thrasher ****! 4/2 4/28 5/7 6/9 6/29
Barn Swallow ****! 4/3 4/22 5/18 6/29 After Jun 30
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
Cliff Swallow *** 4/11 4/23 6/16 6/24 After Jun 30
Yellow-rumped Warbler ****! 4/11 4/28 5/4 5/15 5/23
Green Heron *** 4/12 4/23 5/14 6/5 6/11
Black-crowned Night-Heron * 4/12 6/4 6/13 After Jun 30 -
Peregrine Falcon ** 4/12 4/21 5/4 5/16 5/27
Semipalmated Sandpiper *** 4/13 4/21 5/15 5/24 6/2
Bank Swallow *** 4/13 4/27 5/15 5/24 After Jun 30
Wilson's Phalarope ****! 4/16 4/21 4/28 5/22 After Jun 30
Solitary Sandpiper *** 4/16 4/25 5/3 5/11 5/23
Chimney Swift ****! 4/16 4/26 5/13 6/9 6/14
House Wren ****! 4/16 4/28 5/12 5/21 6/9
Long-billed Dowitcher *** 4/17 4/21 5/1 5/20 5/27
Willet *** 4/17 4/22 4/29 5/6 After Jun 30
Harris's Sparrow *** 4/17 4/23 5/2 5/13 5/22
Least Sandpiper *** 4/18 4/21 5/14 5/21 5/27
Spotted Sandpiper ****! 4/18 4/28 5/12 5/24 6/1
Ruby-throated Hummingbird *** 4/18 5/1 5/16 5/23 6/12
Eastern Kingbird ****! 4/18 4/30 5/24 6/24 6/26
White-throated Sparrow *** 4/18 4/25 5/1 5/11 5/23
White-crowned Sparrow ****! 4/19 4/28 5/4 5/14 5/21
Western Kingbird ****! 4/20 4/26 6/6 6/26 After Jun 30
Warbling Vireo ****! 4/20 4/29 5/15 5/23 After Jun 30
Orange-crowned Warbler ****! 4/21 4/28 5/5 5/15 5/22
Kentucky Warbler *** 4/21 5/2 5/12 5/29 6/5
Summer Tanager ****! 4/21 5/1 5/10 5/18 After Jun 30
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 -

Peaking Arrivals

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

Beginning Departures

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

Ending Departures

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

West

Light to moderate flights will occur in many areas of the region on Saturday night, where conditions are favorable primarily away form the Pacific Coast and associated mountain ranges. The northern and eastern Rockies may see more intense movements in favorable conditions on this night and Sunday night. This pattern or one similar to it will persist for several days, but movements will become increasingly southerly in their distribution as precipitation arrives in more northern areas. The distribution of movements will be increasingly restricted to the Desert Southwest and southern Rockies to end the period, where conditions will be favorable on Wednesday and Thursday night for moderate flights.

MacGillivray’s Warbler. Frank Lospalluto/Macaulay Library. eBird S36076050.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Northern Rough-winged Swallow *** 3/2 4/23 5/8 5/29 After Jun 30
Pacific-slope Flycatcher *** 3/16 4/25 5/31 6/22 After Jun 30
Western Kingbird *** 3/19 4/30 5/15 6/4 6/10
Cliff Swallow *** 3/19 4/26 6/19 After Jun 30 -
Barn Swallow *** 3/30 4/23 5/19 6/1 6/12
Green Heron * 4/3 4/21 5/10 5/28 6/8
Dunlin ** 4/8 4/23 4/27 5/7 5/15
Least Sandpiper *** 4/8 4/22 4/28 5/7 5/15
Hammond's Flycatcher ** 4/10 4/21 6/10 6/25 After Jun 30
Chipping Sparrow *** 4/10 5/6 5/14 5/21 5/26
Forster's Tern ** 4/11 4/24 5/9 5/19 6/11
Brown-headed Cowbird ****! 4/11 5/3 5/17 6/1 6/20
Vaux's Swift *** 4/12 4/23 5/8 5/12 5/21
Bank Swallow ** 4/12 4/25 5/19 5/31 6/8
Wilson's Warbler ****! 4/12 4/24 5/10 6/1 6/6
Lazuli Bunting *** 4/12 4/25 5/16 After Jun 30 -
Hermit Warbler *** 4/13 4/24 5/7 After Jun 30 -
Semipalmated Plover *** 4/16 4/23 4/30 5/7 5/14
Olive-sided Flycatcher *** 4/17 5/1 6/3 6/17 6/27
Dusky Flycatcher ** 4/17 5/6 6/9 6/25 After Jun 30
Yellow-breasted Chat *** 4/17 5/6 5/25 6/16 6/23
House Wren *** 4/18 5/1 5/24 6/17 6/22
Calliope Hummingbird * 4/19 6/8 6/14 6/25 After Jun 30
Warbling Vireo *** 4/19 5/1 6/3 6/25 After Jun 30
Green-tailed Towhee *** 4/19 4/23 5/11 5/17 5/22
Townsend's Warbler *** 4/20 4/25 5/9 5/19 6/3
Red-necked Phalarope *** 4/21 4/25 5/15 5/27 6/1
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 - -

Peaking Arrivals

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

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
Common Merganser ** - - Before Mar 1 4/22 5/17
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
Ruby-crowned Kinglet *** - 3/2 3/9 4/25 5/17
Ring-necked Duck ** - 3/2 3/10 4/30 5/17
Lesser Scaup ** 3/2 3/11 3/15 4/27 5/21
Surf Scoter * 3/15 3/18 3/21 5/3 5/21
Green-winged Teal *** 3/20 3/22 3/26 5/2 5/12
Broad-billed Hummingbird * 3/2 3/14 3/28 6/1 6/6
Cooper's Hawk * 3/2 3/14 3/29 5/14 5/26
Northern Shoveler *** 3/20 3/25 4/8 5/5 6/2
Rufous Hummingbird * 3/2 3/19 4/8 5/6 5/20
Mountain Bluebird * 3/2 3/9 4/10 4/23 4/27
White-crowned Sparrow *** 3/20 3/27 4/11 4/26 5/23
Gadwall ** 3/9 3/23 4/13 5/19 After Jun 30
Sharp-shinned Hawk * 4/7 4/10 4/13 5/3 5/20
American Pipit ** 4/2 4/8 4/13 5/8 5/18
Golden-crowned Sparrow *** 4/1 4/5 4/15 4/28 5/15
Greater Yellowlegs *** 3/25 4/6 4/16 5/2 5/11
Cinnamon Teal ** 3/2 4/7 4/19 5/8 6/6
Common Loon ** 3/31 4/12 4/19 5/3 5/12
Yellow-rumped Warbler *** 4/2 4/14 4/19 5/18 5/28
Brant * 4/10 4/15 4/20 5/1 5/14
Eared Grebe ** 3/27 4/9 4/21 5/8 6/1
Osprey ** 3/22 4/4 4/21 4/30 5/23
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

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Glaucous-winged Gull ** - - Before Mar 1 3/3 5/13
Mew Gull * - - Before Mar 1 3/7 5/3
Ring-billed Gull *** - - Before Mar 1 3/17 5/1
Northern Pintail ** - - Before Mar 1 3/22 5/14
Varied Thrush ** - - Before Mar 1 4/5 4/27
Hooded Merganser ** - - Before Mar 1 4/8 5/2
Common Goldeneye *** - - Before Mar 1 4/9 4/26
Dark-eyed Junco *** 3/2 3/3 3/9 4/10 4/24
American Wigeon *** - - Before Mar 1 4/14 5/17
Canvasback ** - - Before Mar 1 4/17 4/30
Pied-billed Grebe ** - - Before Mar 1 4/20 5/31
Common Merganser ** - - Before Mar 1 4/22 5/17
Mountain Bluebird * 3/2 3/9 4/10 4/23 4/27
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

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Farnsworth and Van Doren

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