Regional Migration Forecast: 25 August to 1 September 2017

Bank Swallow. Noah Strycker/Macaulay Library. eBird S38680296.

Continental Summary

Moderate movements featuring Northern Shoveler, Killdeer, Belted Kingfisher, Warbling Vireo, MacGillivray’s Warbler, Yellow Warbler, and Western Tanager are likely in many areas of the West, while the East will see scattered moderate to heavy pulses that feature Blue-winged Teal, Common Nighthawk, Least Flycatcher, Eastern Wood-Pewee, Yellow Warbler, Chestnut-sided Warbler, and Summer Tanager. The dangerous Hurricane Harvey will bring typical Gulf of Mexico bound seabirds and near shore species to inland locations from Texas and Louisiana to Arkansas over the course of the week.

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 blue will experience conditions that are favorable for migration, and areas where blue and green (and red and blue) intersect and overlap may experience migrant concentrations and fallouts as migrants interact with precipitation.

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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.

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Quick Links to Regions

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BirdCast West Region

Upper Midwest and Northeast

Moderate to heavy flights are likely in many areas of the region for the weekend, although the extent of these flights will become increasingly restricted to coastal areas and highly localized mountainous areas by Sunday. However, a new low pressure center moving east through the Upper Mississippi River Valley will bring modest flights by Monday, with some locally heavy flights in the Upper Midwest likely. The progression of this system will be slow, largely as a function of the slow-moving remnant of Hurricane Harvey to the south; but by late in the period, this low pressure center will pass and usher in widespread moderate to heavy flights. Note that the slow progression of this low pressure across the region will create conditions for shorebird and waterbird fallouts in the Great Lakes, particularly from Monday to Wednesday.

Chestnut-sided Warbler. Wendy Hogan/Macaulay Library. eBird S38549420.

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 Harrier ** 8/2 10/9 10/21 11/2 11/13
Cooper's Hawk *** 8/2 9/7 10/11 10/28 11/8
Bald Eagle ** 8/2 9/5 9/17 9/26 10/1
Peregrine Falcon * 8/2 9/23 10/4 10/17 10/28
Northern Waterthrush ** 8/2 8/31 9/10 9/24 10/9
Black-and-white Warbler *** 8/2 8/29 9/13 9/30 10/11
Northern Shoveler ** 8/9 10/12 11/8 After Nov 30 -
Red-breasted Nuthatch ** 8/12 9/4 10/2 10/17 After Nov 30
Green-winged Teal ** 8/13 10/11 10/24 After Nov 30 -
Chestnut-sided Warbler *** 8/14 8/26 9/9 9/25 10/6
Ovenbird *** 8/15 8/29 9/12 9/30 10/12
American Golden-Plover ** 8/16 8/26 9/9 9/22 10/16
Tennessee Warbler *** 8/17 8/29 9/15 10/4 10/19
Golden-winged Warbler * 8/18 8/28 9/8 9/20 9/29
Warbling Vireo *** 8/19 8/27 9/5 9/17 9/25
Veery *** 8/19 8/28 9/7 9/19 9/28
American Redstart ****! 8/20 8/31 9/12 9/26 10/8
Magnolia Warbler ****! 8/20 9/1 9/16 10/2 10/13
Yellow-throated Vireo *** 8/21 8/29 9/9 9/22 10/2
Wood Thrush ** 8/22 8/28 9/12 10/1 10/12
Wilson's Warbler *** 8/22 8/31 9/11 9/23 10/2
Red-headed Woodpecker * 8/23 9/1 9/11 9/27 10/13
White-eyed Vireo *** 8/23 8/31 9/10 9/23 10/3
Blue Jay ****! 8/23 9/8 9/28 10/30 11/26
Nashville Warbler *** 8/23 9/3 9/20 10/10 10/22
Hooded Warbler * 8/23 8/31 9/10 9/24 10/5
Black-throated Blue Warbler *** 8/23 9/2 9/25 10/14 10/23
Pine Warbler *** 8/23 9/4 9/21 10/12 10/26
Common Yellowthroat *** 8/24 9/2 9/17 10/9 10/23
Black-throated Green Warbler *** 8/24 9/7 9/21 10/6 10/17
Scarlet Tanager *** 8/24 9/3 9/15 10/1 10/12
Cape May Warbler *** 8/25 9/4 9/18 10/2 10/15
Red-shouldered Hawk ** 8/26 9/5 9/21 11/10 11/19
Merlin *** 8/26 9/4 9/20 10/26 11/6
Bay-breasted Warbler *** 8/26 9/4 9/15 9/28 10/8
Philadelphia Vireo *** 8/27 9/5 9/16 9/28 10/7
Swainson's Thrush *** 8/27 9/5 9/17 9/30 10/14
Summer Tanager * 8/27 9/7 9/17 10/2 10/12
Turkey Vulture *** 8/28 9/6 9/19 10/27 After Nov 30
Gray Catbird *** 8/28 9/8 9/18 10/9 10/22
Northern Parula *** 8/28 9/7 9/20 10/4 10/15
Blackpoll Warbler *** 8/28 9/7 9/22 10/8 10/23
American Kestrel *** 8/29 9/6 9/26 10/22 11/2
Northern Flicker ****! 8/30 9/12 9/25 10/10 10/30
House Wren *** 8/30 9/5 9/15 10/7 10/21
Brown Thrasher *** 8/30 9/9 9/21 10/4 10/17
Rose-breasted Grosbeak *** 8/30 9/7 9/17 9/30 10/9
Sharp-shinned Hawk *** 8/31 9/10 10/17 10/30 After Nov 30
Broad-winged Hawk *** 8/31 9/8 9/18 9/29 10/7
Gray-cheeked Thrush *** 9/2 9/11 9/23 10/5 10/14
Palm Warbler *** 9/2 9/21 10/6 10/21 11/1

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Sanderling * - 8/2 9/2 9/22 10/4
White-rumped Sandpiper * - 8/2 8/27 9/15 9/22
Ruby-throated Hummingbird *** - 8/2 8/31 9/21 10/3
Belted Kingfisher ** - 8/2 9/19 10/16 10/29
Blue-winged Warbler ** - 8/2 8/28 9/15 9/26
Prairie Warbler * - 8/2 9/10 9/25 10/7
Blue-gray Gnatcatcher ** 8/2 8/12 8/26 9/15 9/27
Stilt Sandpiper * 8/12 8/18 8/26 9/8 9/18
Olive-sided Flycatcher * 8/2 8/18 8/30 9/12 9/25
Eastern Wood-Pewee *** 8/7 8/18 8/29 9/24 10/9
Canada Warbler *** 8/2 8/18 8/29 9/11 9/24
Blue-winged Teal ** 8/2 8/19 9/7 10/22 11/5
Red Knot * 8/11 8/19 8/28 9/10 9/22
Western Sandpiper * 8/13 8/19 8/28 9/9 9/20
Bobolink ** 8/2 8/19 9/2 9/16 10/19
Baird's Sandpiper ** 8/12 8/20 8/30 9/10 9/19
Common Nighthawk *** 8/13 8/20 8/29 9/8 9/15
Sora * 8/12 8/21 9/24 10/12 10/25
Least Flycatcher ** 8/11 8/21 9/3 9/21 10/4
Great Crested Flycatcher * 8/15 8/21 8/27 9/14 9/24
Buff-breasted Sandpiper ** 8/16 8/23 9/3 9/14 9/22
Blackburnian Warbler ** 8/12 8/23 9/8 9/26 10/7
Yellow-bellied Flycatcher * 8/13 8/24 9/6 9/20 9/30
Red-eyed Vireo *** 8/15 8/24 9/7 9/28 10/11
American Golden-Plover ** 8/16 8/26 9/9 9/22 10/16
Chestnut-sided Warbler *** 8/14 8/26 9/9 9/25 10/6
Warbling Vireo *** 8/19 8/27 9/5 9/17 9/25
Veery ** 8/19 8/28 9/7 9/19 9/28
Wood Thrush ** 8/22 8/28 9/12 10/1 10/12
Golden-winged Warbler * 8/18 8/28 9/8 9/20 9/29
Yellow-throated Vireo *** 8/21 8/29 9/9 9/22 10/2
Ovenbird ** 8/15 8/29 9/12 9/30 10/12
Black-and-white Warbler *** 8/2 8/29 9/13 9/30 10/11
Tennessee Warbler *** 8/17 8/29 9/15 10/4 10/19
White-eyed Vireo *** 8/23 8/31 9/10 9/23 10/3
Northern Waterthrush ** 8/2 8/31 9/10 9/24 10/9
Hooded Warbler * 8/23 8/31 9/10 9/24 10/5
American Redstart *** 8/20 8/31 9/12 9/26 10/8
Wilson's Warbler *** 8/22 8/31 9/11 9/23 10/2
Red-headed Woodpecker * 8/23 9/1 9/11 9/27 10/13
Magnolia Warbler *** 8/20 9/1 9/16 10/2 10/13
Common Yellowthroat *** 8/24 9/2 9/17 10/9 10/23
Black-throated Blue Warbler *** 8/23 9/2 9/25 10/14 10/23

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Killdeer *** - - Before Aug 1 10/25 11/24
Spotted Sandpiper *** - - Before Aug 1 9/3 9/18
Whimbrel * - - Before Aug 1 9/19 10/3
Cliff Swallow * - - Before Aug 1 8/29 9/17
Blue Grosbeak * - - Before Aug 1 8/31 10/17
Bank Swallow ** - 8/2 8/5 8/28 9/12
Yellow-crowned Night-Heron * - 8/2 8/6 10/10 10/28
Yellow-billed Cuckoo * - 8/2 8/6 9/28 10/12
Eastern Kingbird *** - 8/2 8/9 8/26 9/7
Tree Swallow *** - 8/2 8/9 10/25 11/6
Barn Swallow *** - 8/2 8/9 8/28 9/13
Ruddy Turnstone * - 8/2 8/10 9/2 9/25
Snowy Egret ** - 8/2 8/11 10/17 10/31
Willet ** - 8/2 8/11 8/28 9/14
Green Heron *** - 8/2 8/12 9/16 10/5
Great Egret *** - 8/2 8/13 10/22 11/5
Solitary Sandpiper *** - 8/2 8/13 9/11 9/30
Laughing Gull ** - 8/2 8/14 After Nov 30 -
Great Blue Heron *** - 8/2 8/15 10/20 After Nov 30
Osprey *** - 8/2 8/15 10/19 11/4
Forster's Tern * - 8/2 8/16 9/26 After Nov 30
Short-billed Dowitcher *** 8/2 8/11 8/17 9/4 9/14
Cedar Waxwing *** - 8/2 8/17 9/25 After Nov 30
Black-bellied Plover ** - 8/2 8/18 8/27 After Nov 30
Semipalmated Plover *** - 8/2 8/18 9/11 9/28
Chimney Swift *** 8/9 8/14 8/18 10/11 10/20
Lesser Yellowlegs *** - 8/2 8/19 9/5 9/24
Least Sandpiper *** - 8/2 8/19 9/8 9/22
Greater Yellowlegs ** - 8/2 8/20 11/11 After Nov 30
Semipalmated Sandpiper *** 8/2 8/7 8/20 9/6 9/20
Caspian Tern ** - 8/2 8/20 9/12 10/22
Baltimore Oriole *** - 8/2 8/20 9/3 9/13
Wood Duck ** - 8/2 8/21 11/2 11/22
Royal Tern * - 8/2 8/21 11/8 After Nov 30
Pectoral Sandpiper ** 8/11 8/17 8/23 9/7 11/13
Black Tern ** 8/7 8/16 8/25 9/7 9/18
Stilt Sandpiper ** 8/12 8/18 8/26 9/8 9/18
Blue-gray Gnatcatcher *** 8/2 8/12 8/26 9/15 9/27
White-rumped Sandpiper * - 8/2 8/27 9/15 9/22
Great Crested Flycatcher *** 8/15 8/21 8/27 9/14 9/24
Red Knot * 8/11 8/19 8/28 9/10 9/22
Western Sandpiper * 8/13 8/19 8/28 9/9 9/20
Blue-winged Warbler ** - 8/2 8/28 9/15 9/26
Common Nighthawk *** 8/13 8/20 8/29 9/8 9/15
Eastern Wood-Pewee *** 8/7 8/18 8/29 9/24 10/9
Canada Warbler ** 8/2 8/18 8/29 9/11 9/24
Baird's Sandpiper ** 8/12 8/20 8/30 9/10 9/19
Olive-sided Flycatcher * 8/2 8/18 8/30 9/12 9/25
Ruby-throated Hummingbird *** - 8/2 8/31 9/21 10/3
Sanderling ** - 8/2 9/2 9/22 10/4
Bobolink ** 8/2 8/19 9/2 9/16 10/19

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Black Skimmer * - - Before Aug 1 8/3 10/28
Yellow Warbler *** - - Before Aug 1 8/10 9/24
Orchard Oriole * - - Before Aug 1 8/21 9/6
Piping Plover * - 8/2 8/6 8/22 9/1
Least Tern ** - - Before Aug 1 8/22 9/6
Purple Martin *** - - Before Aug 1 8/22 9/7
Glossy Ibis * - - Before Aug 1 8/23 9/24
American Oystercatcher * - 8/2 8/4 8/23 9/26
Common Tern *** - - Before Aug 1 8/24 9/30
Little Blue Heron * - 8/2 8/9 8/25 10/24
Black-crowned Night-Heron * - 8/2 8/9 8/25 10/27
Northern Rough-winged Swallow ** - - Before Aug 1 8/25 10/25
Eastern Kingbird *** - 8/2 8/9 8/26 9/7
Black-bellied Plover * - 8/2 8/18 8/27 After Nov 30
Willet ** - 8/2 8/11 8/28 9/14
Bank Swallow *** - 8/2 8/5 8/28 9/12
Barn Swallow *** - 8/2 8/9 8/28 9/13
Cliff Swallow ** - - Before Aug 1 8/29 9/17
Blue Grosbeak * - - Before Aug 1 8/31 10/17
Ruddy Turnstone ** - 8/2 8/10 9/2 9/25

Gulf Coast and Southeast

A striking duality will be apparent in the region for the period. To the east of the Mississippi River, favorable migration conditions will facilitate moderate to heavy flights for the first half of the period. At the same time, the dangerous and slow moving Hurricane Harvey and its eventual remnants shut down migration to the west of the Mississippi River, particular in coastal Texas and Louisiana. Although most migration in the vicinity of the storm will be grounded, entrained and displaced seabirds, shorebirds, and waterbirds (and perhaps a White-collared Swift or two?) are likely in all coastal areas and on inland bodies of water (but safety is the first priority, always!). To the north of the storm, farther inland, moderate to locally very heavy flights may occur. As this cyclone moves east and loses some strength, slowly, heavy and very heavy flights are likely to the west of precipitation as favorable conditions return. This will be particularly true in Texas by Wednesday and Thursday.

Prothonotary Warbler. Joan Baker/Macaulay Library. eBird S38575686.

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Great Blue Heron *** 8/2 11/5 11/16 After Nov 30 -
Cooper's Hawk ** 8/2 9/21 10/17 After Nov 30 -
American Avocet * 8/2 10/22 11/7 After Nov 30 -
Yellow-bellied Flycatcher * 8/2 9/4 9/16 10/1 10/11
Least Flycatcher ** 8/2 9/2 9/12 9/24 10/5
Cave Swallow * 8/2 8/28 9/4 9/16 11/21
Blue-gray Gnatcatcher *** 8/2 8/29 9/12 9/26 10/15
Yellow-throated Warbler ** 8/2 9/3 9/25 10/20 11/4
Prairie Warbler ** 8/2 9/7 9/22 10/14 11/3
Blue-winged Teal *** 8/8 8/26 11/8 11/29 After Nov 30
Northern Parula *** 8/11 9/2 9/19 10/24 11/4
Ruby-throated Hummingbird *** 8/13 8/29 9/13 10/4 10/19
Belted Kingfisher *** 8/13 9/18 10/22 After Nov 30 -
Northern Waterthrush *** 8/15 9/7 9/20 10/3 10/13
Pine Warbler *** 8/15 9/1 10/9 10/26 11/3
Yellow-throated Vireo *** 8/17 8/31 9/15 9/30 10/13
Canada Warbler ** 8/17 8/27 9/8 9/22 10/4
Buff-breasted Sandpiper * 8/18 8/27 9/4 9/17 9/25
Eastern Wood-Pewee *** 8/19 9/1 9/17 10/17 11/2
Red-eyed Vireo *** 8/20 9/3 9/17 10/8 10/24
Common Nighthawk ** 8/21 8/27 9/3 9/16 9/24
Acadian Flycatcher ** 8/21 9/1 9/15 10/2 10/16
White-eyed Vireo *** 8/21 9/2 9/19 10/13 10/28
Blue-winged Warbler ** 8/21 9/2 9/15 9/29 10/10
Mourning Warbler ** 8/21 8/30 9/11 9/22 10/2
Summer Tanager *** 8/21 9/1 9/15 10/1 10/18
Dickcissel * 8/21 8/29 9/5 9/20 10/25
Bobolink ** 8/21 9/2 9/20 10/13 10/26
Red-headed Woodpecker ** 8/22 9/4 9/18 10/26 11/5
Black-and-white Warbler *** 8/22 9/5 9/22 10/25 11/5
Chimney Swift *** 8/23 9/5 9/21 10/11 10/22
Chestnut-sided Warbler *** 8/23 9/6 9/22 10/9 10/23
Ovenbird *** 8/26 9/11 9/25 10/25 11/5
Blackburnian Warbler *** 8/26 9/5 9/18 10/3 10/28
Baltimore Oriole *** 8/26 9/2 9/12 9/23 10/1
Wilson's Warbler *** 8/27 9/4 9/17 9/29 10/16
Black Vulture ** 8/28 9/30 11/18 After Nov 30 -
Warbling Vireo ** 8/28 9/6 9/17 9/29 10/8
Cedar Waxwing * 8/28 9/6 9/18 9/29 10/7
Black-throated Green Warbler *** 8/28 9/6 10/10 10/25 11/6
Sora * 8/29 9/21 11/7 11/17 After Nov 30
Nashville Warbler *** 8/30 9/11 10/4 10/24 11/12
Scarlet Tanager *** 8/30 9/12 9/28 10/14 10/25
Veery *** 8/31 9/8 9/20 10/1 10/10
Tennessee Warbler *** 8/31 9/11 10/3 10/23 11/3
American Redstart ****! 8/31 9/12 9/26 10/19 11/2
Magnolia Warbler *** 8/31 9/13 10/1 10/19 10/31
Black-throated Blue Warbler *** 8/31 9/11 10/11 10/27 11/5
Common Yellowthroat *** 9/1 9/17 10/6 10/21 11/2
Brown Thrasher *** 9/2 9/22 10/6 10/21 11/3
Clay-colored Sparrow * 9/2 9/16 10/4 10/21 11/6

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Swainson's Hawk * - 8/2 10/2 10/16 10/28
Black-bellied Plover * - 8/2 10/31 After Nov 30 -
Caspian Tern * - 8/2 11/7 After Nov 30 -
Olive-sided Flycatcher * - 8/2 9/6 9/24 10/4
Yellow Warbler *** - 8/2 9/8 9/30 10/13
Semipalmated Sandpiper * 8/2 8/13 8/26 9/14 9/28
Kentucky Warbler * 8/2 8/13 9/4 9/25 10/6
Prothonotary Warbler * 8/2 8/15 8/29 9/24 10/6
Western Sandpiper * 8/2 8/17 8/31 9/15 After Nov 30
Baird's Sandpiper * 8/2 8/19 8/30 9/17 9/28
Hooded Warbler ** 8/8 8/20 9/20 10/5 10/29
Bank Swallow ** 8/14 8/21 8/31 9/12 9/22
Great Crested Flycatcher *** 8/15 8/23 9/2 9/19 10/1
Worm-eating Warbler ** 8/11 8/23 9/16 10/1 10/10
Yellow-breasted Chat ** 8/17 8/25 9/7 9/23 10/7
Blue-winged Teal * 8/8 8/26 11/8 11/29 After Nov 30
Buff-breasted Sandpiper * 8/18 8/27 9/4 9/17 9/25
Common Nighthawk ** 8/21 8/27 9/3 9/16 9/24
Canada Warbler ** 8/17 8/27 9/8 9/22 10/4
Cave Swallow * 8/2 8/28 9/4 9/16 11/21
Ruby-throated Hummingbird *** 8/13 8/29 9/13 10/4 10/19
Blue-gray Gnatcatcher *** 8/2 8/29 9/12 9/26 10/15
Dickcissel * 8/21 8/29 9/5 9/20 10/25
Mourning Warbler ** 8/21 8/30 9/11 9/22 10/2
Yellow-throated Vireo ** 8/17 8/31 9/15 9/30 10/13
Eastern Wood-Pewee *** 8/19 9/1 9/17 10/17 11/2
Acadian Flycatcher ** 8/21 9/1 9/15 10/2 10/16
Pine Warbler *** 8/15 9/1 10/9 10/26 11/3
Summer Tanager *** 8/21 9/1 9/15 10/1 10/18
Least Flycatcher ** 8/2 9/2 9/12 9/24 10/5
White-eyed Vireo *** 8/21 9/2 9/19 10/13 10/28
Blue-winged Warbler ** 8/21 9/2 9/15 9/29 10/10
Northern Parula *** 8/11 9/2 9/19 10/24 11/4
Baltimore Oriole *** 8/26 9/2 9/12 9/23 10/1
Bobolink * 8/21 9/2 9/20 10/13 10/26

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Cattle Egret ** - - Before Aug 1 10/3 10/18
Green Heron *** - - Before Aug 1 9/18 10/8
Yellow-crowned Night-Heron * - - Before Aug 1 10/8 10/23
Least Tern ** - - Before Aug 1 9/3 9/17
Black-chinned Hummingbird * - - Before Aug 1 9/21 10/10
Eastern Kingbird *** - - Before Aug 1 9/22 10/5
Cliff Swallow ** - - Before Aug 1 9/14 10/18
Orchard Oriole * - - Before Aug 1 9/14 9/30
Gray Kingbird * - - Before Aug 1 9/17 10/11
Mississippi Kite *** - 8/2 8/10 8/29 9/8
Barn Swallow *** - 8/2 8/10 9/9 11/14
Louisiana Waterthrush * - 8/2 8/13 9/6 9/30
Wilson's Plover * - 8/2 8/14 9/3 9/23
Stilt Sandpiper * - 8/2 8/14 9/17 9/27
Black Skimmer ** - 8/2 8/14 8/30 9/11
Pectoral Sandpiper * - 8/2 8/16 9/19 9/30
Sandwich Tern * - 8/2 8/16 8/27 After Nov 30
Ruddy Turnstone ** - 8/2 8/17 8/28 9/7
Spotted Sandpiper *** - 8/2 8/18 9/10 9/22
Common Tern * - 8/2 8/18 9/30 11/10
Upland Sandpiper ** - 8/2 8/19 9/11 9/24
Sanderling * - 8/2 8/19 9/3 9/16
Semipalmated Plover ** - 8/2 8/20 9/17 9/27
Piping Plover * - 8/2 8/20 After Nov 30 -
Solitary Sandpiper ** 8/13 8/16 8/20 9/11 9/23
Short-billed Dowitcher * - 8/2 8/22 9/6 9/21
Wilson's Phalarope * - 8/2 8/23 9/14 10/2
Black Tern *** 8/2 8/6 8/24 9/10 9/26
Least Sandpiper *** - 8/2 8/25 9/15 After Nov 30
Semipalmated Sandpiper ** 8/2 8/13 8/26 9/14 9/28
Prothonotary Warbler * 8/2 8/15 8/29 9/24 10/6
Baird's Sandpiper * 8/2 8/19 8/30 9/17 9/28
Western Sandpiper ** 8/2 8/17 8/31 9/15 After Nov 30
Bank Swallow ** 8/14 8/21 8/31 9/12 9/22
Great Crested Flycatcher *** 8/15 8/23 9/2 9/19 10/1

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Swallow-tailed Kite ** - - Before Aug 1 8/3 8/27
Purple Martin *** - - Before Aug 1 8/3 9/10
Western Kingbird ** - - Before Aug 1 8/14 9/8
Blue Grosbeak ** - - Before Aug 1 8/24 10/28
Sandwich Tern * - 8/2 8/16 8/27 After Nov 30
Ruddy Turnstone ** - 8/2 8/17 8/28 9/7
Mississippi Kite *** - 8/2 8/10 8/29 9/8
Black Skimmer ** - 8/2 8/14 8/30 9/11

Great Plains

A relatively quiet and slow weekend for migration will give way to moderate to heavy flights by Sunday night across the northern and central Plains. Favorable migration conditions will continue for much of the period, but the extent of these conditions will become increasingly restricted by Wednesday and Thursday; so too will the distribution of increasingly less intense flights. By the end of the period, unfavorable conditions for migration are mostly in place, keeping movements local and light. Note, however, that the path of Hurricane Harvey’s remnants may bring a distinctly more tropical flavor to the southern Plains by Thursday or Friday; birders should be safe but watchful, as opportunities to find displaced and entrained seabirds and concentrations of waterbirds and shorebirds are possible.

Buff-breasted Sandpiper. Nick Anich/Macaulay Library. eBird S38797774.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
American White Pelican ** 8/2 9/8 10/18 After Nov 30 -
Turkey Vulture *** 8/2 9/4 9/27 10/16 10/25
Cooper's Hawk *** 8/2 9/5 9/24 10/24 11/8
Red-shouldered Hawk * 8/2 9/7 9/29 10/28 11/25
Wilson's Snipe * 8/2 10/3 10/18 11/3 11/16
Caspian Tern * 8/2 8/31 9/11 9/26 10/9
Peregrine Falcon * 8/2 9/13 9/24 10/9 10/23
Gray Catbird *** 8/2 9/4 9/13 10/1 10/13
Western Meadowlark ** 8/2 9/9 10/15 10/29 11/7
Purple Finch * 8/2 10/27 After Nov 30 - -
American Golden-Plover * 8/12 9/22 9/30 10/12 11/16
Say's Phoebe * 8/16 8/28 9/7 9/26 10/8
Magnolia Warbler ** 8/16 8/27 9/9 9/23 10/3
Philadelphia Vireo ** 8/18 8/31 9/13 9/27 10/6
Merlin * 8/19 9/6 10/24 11/8 11/24
Yellow-breasted Chat * 8/19 8/26 9/5 9/20 9/30
Warbling Vireo *** 8/20 8/28 9/6 9/19 9/27
Black-throated Green Warbler * 8/20 9/2 9/22 10/13 10/28
Clay-colored Sparrow *** 8/20 9/3 9/24 10/16 10/30
White-eyed Vireo ** 8/24 9/1 9/12 9/27 10/8
Yellow-throated Vireo ** 8/24 8/31 9/8 9/19 9/27
Swainson's Thrush *** 8/24 9/1 9/11 9/22 10/1
Blue-headed Vireo *** 8/25 9/2 9/16 9/28 10/24
House Wren *** 8/25 9/1 9/11 10/6 10/20
Brown Thrasher *** 8/26 9/4 9/14 9/29 10/9
Northern Parula *** 8/26 9/2 9/12 9/24 10/5
Nashville Warbler *** 8/27 9/5 9/22 10/14 10/24
Osprey *** 8/28 9/9 9/23 10/6 11/11
Common Yellowthroat *** 8/30 9/6 9/20 10/12 10/21
Sharp-shinned Hawk *** 8/31 10/2 10/17 10/28 After Nov 30
Eastern Phoebe *** 9/1 9/13 9/25 10/12 10/25
Summer Tanager *** 9/2 9/10 9/20 10/4 10/14

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Great Egret * - 8/2 9/13 10/20 11/11
Black-crowned Night-Heron * - 8/2 8/27 9/27 10/28
White-faced Ibis * - 8/2 9/1 10/2 10/30
Swainson's Hawk ** - 8/2 9/11 10/14 10/22
Sora * - 8/2 9/27 10/20 11/4
Greater Yellowlegs * - 8/2 10/27 11/16 After Nov 30
Ruby-throated Hummingbird *** - 8/2 8/31 9/22 10/5
Red-headed Woodpecker ** - 8/2 8/29 9/23 10/13
Blue-gray Gnatcatcher * - 8/2 8/30 9/20 10/1
Yellow Warbler *** - 8/2 8/29 9/18 9/27
Tennessee Warbler ** 8/2 8/9 9/9 10/3 10/23
Blue-winged Teal *** 8/2 8/10 9/13 10/24 11/10
Rose-breasted Grosbeak * 8/2 8/12 9/2 9/29 10/12
Canada Warbler * 8/2 8/16 8/31 9/14 9/25
Baltimore Oriole *** 8/7 8/17 8/26 9/8 9/18
Stilt Sandpiper ** 8/13 8/19 8/27 9/8 9/16
Bell's Vireo ** 8/14 8/19 8/26 9/9 9/19
Northern Waterthrush ** 8/12 8/19 8/29 9/8 9/17
Sanderling * 8/2 8/20 9/6 10/7 10/26
Least Flycatcher *** 8/2 8/20 9/4 9/20 10/2
Red-eyed Vireo *** 8/2 8/20 9/1 9/20 10/2
Mourning Warbler ** 8/12 8/20 9/1 9/13 9/27
Buff-breasted Sandpiper * 8/16 8/21 8/29 9/10 9/18
Common Nighthawk *** 8/15 8/21 8/29 10/1 10/10
Chestnut-sided Warbler * 8/11 8/21 9/3 9/18 10/1
Red-necked Phalarope * 8/2 8/22 9/7 9/29 10/15
Ovenbird ** 8/13 8/22 9/4 9/18 10/5
Olive-sided Flycatcher *** 8/13 8/23 9/3 9/16 9/24
Black-and-white Warbler *** 8/11 8/23 9/5 9/21 10/2
American Redstart *** 8/10 8/24 9/5 9/19 9/28
Semipalmated Plover * 8/22 8/25 8/29 9/15 9/23
Great Crested Flycatcher * 8/2 8/25 8/30 9/16 9/25
Yellow-breasted Chat * 8/19 8/26 9/5 9/20 9/30
Magnolia Warbler * 8/16 8/27 9/9 9/23 10/3
Say's Phoebe * 8/16 8/28 9/7 9/26 10/8
Warbling Vireo *** 8/20 8/28 9/6 9/19 9/27
Caspian Tern * 8/2 8/31 9/11 9/26 10/9
Yellow-throated Vireo * 8/24 8/31 9/8 9/19 9/27
Philadelphia Vireo * 8/18 8/31 9/13 9/27 10/6
White-eyed Vireo * 8/24 9/1 9/12 9/27 10/8
House Wren ** 8/25 9/1 9/11 10/6 10/20
Swainson's Thrush *** 8/24 9/1 9/11 9/22 10/1
Blue-headed Vireo *** 8/25 9/2 9/16 9/28 10/24
Northern Parula ** 8/26 9/2 9/12 9/24 10/5
Black-throated Green Warbler * 8/20 9/2 9/22 10/13 10/28

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Cattle Egret * - - Before Aug 1 10/1 11/2
Killdeer *** - - Before Aug 1 11/4 After Nov 30
Spotted Sandpiper *** - - Before Aug 1 9/9 9/29
Willet * - - Before Aug 1 8/26 9/29
Baird's Sandpiper ** - - Before Aug 1 9/10 9/21
Pectoral Sandpiper ** - - Before Aug 1 9/2 10/23
Black Tern ** - - Before Aug 1 9/12 9/30
Northern Rough-winged Swallow ** - - Before Aug 1 10/7 10/23
Tree Swallow ** - - Before Aug 1 9/9 11/1
Cliff Swallow *** - - Before Aug 1 8/31 9/22
Lark Sparrow *** - - Before Aug 1 9/13 9/26
Bobolink * - - Before Aug 1 9/4 10/2
Yellow-headed Blackbird * - 8/2 8/9 9/27 10/8
Lark Bunting ** - 8/2 8/11 9/17 9/24
Eastern Kingbird *** - 8/2 8/13 9/4 9/21
Solitary Sandpiper ** 8/2 8/7 8/15 9/10 9/26
Marbled Godwit * - 8/2 8/15 9/10 10/2
Chimney Swift *** - 8/2 8/15 10/11 10/20
Green Heron *** - 8/2 8/17 9/22 10/9
Mourning Dove *** - 8/2 8/17 10/4 10/25
Bank Swallow *** - 8/2 8/19 9/10 9/26
Wood Duck ** - 8/2 8/20 10/28 After Nov 30
Snowy Egret ** - 8/2 8/20 10/5 10/26
Mississippi Kite *** 8/9 8/14 8/20 9/7 9/20
Lesser Yellowlegs ** - 8/2 8/20 9/13 11/8
Semipalmated Sandpiper *** 8/2 8/13 8/20 9/9 9/23
Forster's Tern ** - 8/2 8/20 9/10 10/19
Eastern Wood-Pewee *** - 8/2 8/20 9/21 10/5
Little Blue Heron ** 8/2 8/11 8/21 9/8 10/7
Black-bellied Plover * - 8/2 8/21 9/1 11/21
Snowy Plover * 8/2 8/9 8/23 9/8 9/19
Wilson's Phalarope ** 8/12 8/17 8/23 9/12 9/25
Black-necked Stilt * 8/2 8/15 8/24 9/7 9/18
Least Sandpiper *** 8/2 8/6 8/25 9/14 9/24
Western Wood-Pewee * 8/12 8/18 8/25 9/11 9/23
Bell's Vireo *** 8/14 8/19 8/26 9/9 9/19
Baltimore Oriole *** 8/7 8/17 8/26 9/8 9/18
Black-crowned Night-Heron * - 8/2 8/27 9/27 10/28
Stilt Sandpiper *** 8/13 8/19 8/27 9/8 9/16
Semipalmated Plover ** 8/22 8/25 8/29 9/15 9/23
Buff-breasted Sandpiper ** 8/16 8/21 8/29 9/10 9/18
Common Nighthawk *** 8/15 8/21 8/29 10/1 10/10
Red-headed Woodpecker *** - 8/2 8/29 9/23 10/13
Northern Waterthrush ** 8/12 8/19 8/29 9/8 9/17
Yellow Warbler *** - 8/2 8/29 9/18 9/27
Great Crested Flycatcher *** 8/2 8/25 8/30 9/16 9/25
Blue-gray Gnatcatcher *** - 8/2 8/30 9/20 10/1
Ruby-throated Hummingbird *** - 8/2 8/31 9/22 10/5
Canada Warbler * 8/2 8/16 8/31 9/14 9/25
White-faced Ibis * - 8/2 9/1 10/2 10/30
Red-eyed Vireo *** 8/2 8/20 9/1 9/20 10/2
Mourning Warbler * 8/12 8/20 9/1 9/13 9/27
Rose-breasted Grosbeak ** 8/2 8/12 9/2 9/29 10/12

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Western Kingbird *** - - Before Aug 1 8/3 9/15
Dickcissel *** - - Before Aug 1 8/4 9/1
Orchard Oriole *** - - Before Aug 1 8/15 9/18
Yellow-crowned Night-Heron * - - Before Aug 1 8/17 10/10
Yellow-billed Cuckoo *** - - Before Aug 1 8/17 10/2
Least Tern * - - Before Aug 1 8/22 9/15
Purple Martin *** - - Before Aug 1 8/23 9/6
Blue Grosbeak *** - 8/2 8/9 8/23 9/3
Upland Sandpiper *** - - Before Aug 1 8/25 9/17
Willet * - - Before Aug 1 8/26 9/29
Cliff Swallow *** - - Before Aug 1 8/31 9/22
Black-bellied Plover * - 8/2 8/21 9/1 11/21
Pectoral Sandpiper ** - - Before Aug 1 9/2 10/23

West

Scattered moderate flights are likely in many areas during this forecast period, particularly over the weekend. Although the extent of flights will be at its greatest on Saturday and Sunday nights, all of the remaining nights of the period will host noticeable movements in many areas. Note that late in the period there is potential for a tropical system to approach the Desert Southwest, a scenario we will watch carefully.

Western Tanager. Marlene Cashen/Macaulay Library. eBird S38438583.

Species on the Move

Beginning Arrivals What is this?

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Canada Goose ** 8/2 11/4 After Nov 30 - -
Pied-billed Grebe ** 8/2 10/19 11/11 After Nov 30 -
Sooty Shearwater * 8/2 9/5 9/15 9/29 10/8
Cooper's Hawk ** 8/2 9/7 10/1 10/24 11/11
California Gull * 8/2 10/22 11/7 After Nov 30 -
Cassin's Vireo * 8/2 8/29 9/8 9/20 9/29
Wilson's Warbler *** 8/2 8/27 9/8 9/24 10/9
Brewer's Sparrow ** 8/2 8/29 9/9 9/24 10/5
Savannah Sparrow *** 8/2 9/3 9/23 10/24 11/2
Red-tailed Hawk *** 8/7 9/10 After Nov 30 - -
Pink-footed Shearwater * 8/8 8/27 9/14 10/25 11/7
Ring-billed Gull ** 8/10 11/7 11/22 After Nov 30 -
Townsend's Warbler *** 8/13 8/30 10/2 10/22 11/6
Turkey Vulture *** 8/14 9/9 9/17 10/5 10/17
Willow Flycatcher ** 8/14 8/26 9/5 9/19 9/29
Heermann's Gull * 8/15 9/14 9/21 10/2 After Nov 30
Black Phoebe *** 8/16 9/9 11/17 After Nov 30 -
Northern Harrier ** 8/17 11/8 11/20 After Nov 30 -
Red-shouldered Hawk ** 8/17 9/12 10/3 After Nov 30 -
Clay-colored Sparrow * 8/17 8/28 9/14 10/18 11/6
Orange-crowned Warbler *** 8/18 9/1 9/18 10/15 10/27
Common Yellowthroat *** 8/18 8/30 9/15 10/5 10/27
Sora * 8/21 9/1 9/13 9/23 After Nov 30
Warbling Vireo *** 8/21 8/29 9/9 9/22 10/9
Marsh Wren * 8/21 9/20 10/29 After Nov 30 -
Swainson's Thrush ** 8/22 8/29 9/10 9/25 10/7
Sharp-shinned Hawk ** 8/23 9/10 10/19 11/11 After Nov 30
Olive-sided Flycatcher * 8/23 8/26 8/29 9/17 9/28
House Wren *** 8/23 8/31 9/9 9/21 10/26
Western Tanager *** 8/23 8/30 9/8 9/21 10/3
Brewer's Blackbird *** 8/23 9/11 9/27 10/20 After Nov 30
Common Tern * 8/24 9/6 9/17 10/1 10/11
Hammond's Flycatcher * 8/24 8/31 9/8 9/19 9/26
Vesper Sparrow ** 8/24 9/2 9/13 9/27 10/15
Red-winged Blackbird *** 8/25 9/12 10/10 10/27 After Nov 30
Red-necked Grebe * 8/26 10/20 11/3 11/13 11/20
Parasitic Jaeger * 8/26 9/6 9/19 10/1 10/29
Plumbeous Vireo * 8/27 8/31 9/6 9/19 9/27
Vaux's Swift ** 8/28 9/5 9/14 10/3 10/20
Green-tailed Towhee *** 8/28 9/4 9/13 9/24 10/3
Merlin ** 8/30 9/14 11/9 11/28 After Nov 30
American Robin *** 8/30 9/4 10/10 10/17 11/14
Lincoln's Sparrow *** 8/30 9/11 10/4 10/21 11/5
American Pipit *** 8/31 9/11 11/15 After Nov 30 -
Say's Phoebe *** 9/1 9/13 11/21 After Nov 30 -
American Wigeon *** 9/2 10/17 11/22 After Nov 30 -
Eared Grebe *** 9/2 9/16 11/11 After Nov 30 -
Sabine's Gull * 9/2 9/11 9/21 10/3 10/13

Peaking Arrivals

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Blue-winged Teal * - 8/2 9/22 10/23 11/3
Common Merganser * - 8/2 9/23 9/28 9/30
Franklin's Gull * - 8/2 8/31 10/3 11/5
Belted Kingfisher ** - 8/2 10/22 After Nov 30 -
Red-breasted Nuthatch ** - 8/2 9/7 10/19 10/30
Blue-gray Gnatcatcher * - 8/2 9/10 9/22 10/3
Sage Thrasher * - 8/2 8/31 9/20 10/13
Nashville Warbler ** - 8/2 9/5 9/19 9/29
MacGillivray's Warbler *** - 8/2 9/5 9/21 10/2
Yellow Warbler *** - 8/2 9/8 10/2 10/21
Black-throated Gray Warbler * - 8/2 10/4 10/19 10/29
Chipping Sparrow ** - 8/2 9/8 10/18 11/2
Green Heron * 8/2 8/10 8/28 9/23 10/17
White-faced Ibis * 8/2 8/12 8/27 9/26 10/13
Cinnamon Teal * 8/2 8/13 9/2 9/27 10/13
American White Pelican * 8/2 8/13 9/2 9/27 10/19
Solitary Sandpiper * 8/2 8/13 8/26 9/9 9/22
Killdeer *** 8/2 8/14 9/7 10/3 11/3
Virginia's Warbler * 8/2 8/14 8/28 9/16 10/1
Semipalmated Plover ** 8/9 8/17 8/26 9/8 9/20
Wandering Tattler * 8/10 8/17 8/26 10/2 10/10
Marbled Godwit * 8/9 8/17 8/28 9/29 After Nov 30
Black Turnstone * 8/6 8/17 9/21 10/2 After Nov 30
Sanderling * 8/2 8/17 9/8 9/26 10/6
Baird's Sandpiper ** 8/3 8/17 8/27 9/8 9/20
Greater Yellowlegs ** 8/11 8/18 8/28 After Nov 30 -
Short-billed Dowitcher ** 8/10 8/18 8/26 9/6 9/13
Northern Shoveler *** 8/6 8/20 11/20 After Nov 30 -
Northern Pintail ** 8/12 8/20 11/19 After Nov 30 -
Green-winged Teal ** 8/2 8/20 11/17 After Nov 30 -
Black-necked Stilt * 8/16 8/20 8/27 9/26 10/6
Red-necked Phalarope *** 8/8 8/20 9/1 9/16 10/9
American Avocet * 8/15 8/21 8/30 9/30 After Nov 30
Elegant Tern * 8/2 8/21 9/7 After Nov 30 -
Yellow-headed Blackbird * 8/6 8/22 9/2 9/23 10/11
Pectoral Sandpiper ** 8/16 8/25 9/20 10/9 10/24
Pacific-slope Flycatcher ** 8/14 8/25 9/12 10/3 10/17
Gray Catbird * 8/2 8/25 9/2 9/17 9/26
Olive-sided Flycatcher * 8/23 8/26 8/29 9/17 9/28
Willow Flycatcher ** 8/14 8/26 9/5 9/19 9/29
Pink-footed Shearwater * 8/8 8/27 9/14 10/25 11/7
Wilson's Warbler *** 8/2 8/27 9/8 9/24 10/9
Clay-colored Sparrow * 8/17 8/28 9/14 10/18 11/6
Cassin's Vireo * 8/2 8/29 9/8 9/20 9/29
Warbling Vireo *** 8/21 8/29 9/9 9/22 10/9
Swainson's Thrush ** 8/22 8/29 9/10 9/25 10/7
Brewer's Sparrow * 8/2 8/29 9/9 9/24 10/5
Common Yellowthroat *** 8/18 8/30 9/15 10/5 10/27
Townsend's Warbler *** 8/13 8/30 10/2 10/22 11/6
Western Tanager *** 8/23 8/30 9/8 9/21 10/3
Hammond's Flycatcher * 8/24 8/31 9/8 9/19 9/26
Plumbeous Vireo * 8/27 8/31 9/6 9/19 9/27
House Wren ** 8/23 8/31 9/9 9/21 10/26
Sora * 8/21 9/1 9/13 9/23 After Nov 30
Orange-crowned Warbler *** 8/18 9/1 9/18 10/15 10/27
Vesper Sparrow ** 8/24 9/2 9/13 9/27 10/15

Beginning Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Snowy Plover * - - Before Aug 1 9/11 10/1
Whimbrel * - - Before Aug 1 9/29 10/13
Wilson's Phalarope ** - - Before Aug 1 9/8 9/27
Pigeon Guillemot * - - Before Aug 1 8/27 9/8
Caspian Tern ** - - Before Aug 1 9/7 9/27
Black Tern * - - Before Aug 1 9/22 10/4
White-winged Dove *** - - Before Aug 1 9/3 9/15
Common Nighthawk * - - Before Aug 1 9/2 9/24
Black-chinned Hummingbird *** - - Before Aug 1 9/14 10/3
Broad-tailed Hummingbird ** - - Before Aug 1 9/1 9/26
Rufous Hummingbird *** - - Before Aug 1 9/7 9/24
Calliope Hummingbird * - - Before Aug 1 9/5 9/24
Western Kingbird *** - - Before Aug 1 9/4 9/24
Bell's Vireo * - - Before Aug 1 9/28 10/11
Northern Rough-winged Swallow ** - - Before Aug 1 9/10 9/25
Purple Martin * - - Before Aug 1 9/4 9/20
Black-headed Grosbeak *** - - Before Aug 1 9/14 9/28
Blue Grosbeak ** - - Before Aug 1 9/16 10/9
Bullock's Oriole ** - - Before Aug 1 9/2 9/14
Western Wood-Pewee *** - 8/2 8/10 9/20 9/30
Eastern Kingbird ** - 8/2 8/14 8/30 9/10
Lazuli Bunting ** - 8/2 8/14 9/21 10/2
Lark Sparrow ** - 8/2 8/15 9/20 9/30
Bank Swallow * - 8/2 8/17 9/11 9/25
Lark Bunting * - 8/2 8/17 9/17 9/26
Swainson's Hawk ** - 8/2 8/18 9/28 10/12
Spotted Sandpiper *** - 8/2 8/18 9/17 10/3
Mourning Dove *** 8/9 8/14 8/19 9/21 10/8
Hermit Warbler * - 8/2 8/19 9/3 10/23
Semipalmated Sandpiper * 8/2 8/9 8/20 9/5 9/15
Barn Swallow *** 8/2 8/9 8/23 9/17 10/12
Osprey ** - 8/2 8/25 9/16 10/2
Lesser Yellowlegs ** 8/2 8/15 8/25 9/6 10/7
Least Sandpiper *** 8/2 8/14 8/25 9/6 9/16
Western Sandpiper *** 8/2 8/14 8/25 9/6 10/5
Semipalmated Plover *** 8/9 8/17 8/26 9/8 9/20
Solitary Sandpiper ** 8/2 8/13 8/26 9/9 9/22
Wandering Tattler * 8/10 8/17 8/26 10/2 10/10
Short-billed Dowitcher ** 8/10 8/18 8/26 9/6 9/13
White-faced Ibis ** 8/2 8/12 8/27 9/26 10/13
Black-necked Stilt ** 8/16 8/20 8/27 9/26 10/6
Baird's Sandpiper ** 8/3 8/17 8/27 9/8 9/20
Green Heron * 8/2 8/10 8/28 9/23 10/17
Greater Yellowlegs * 8/11 8/18 8/28 After Nov 30 -
Marbled Godwit * 8/9 8/17 8/28 9/29 After Nov 30
Virginia's Warbler * 8/2 8/14 8/28 9/16 10/1
Olive-sided Flycatcher ** 8/23 8/26 8/29 9/17 9/28
American Avocet * 8/15 8/21 8/30 9/30 After Nov 30
Franklin's Gull * - 8/2 8/31 10/3 11/5
Sage Thrasher * - 8/2 8/31 9/20 10/13
Red-necked Phalarope *** 8/8 8/20 9/1 9/16 10/9
Cinnamon Teal * 8/2 8/13 9/2 9/27 10/13
American White Pelican * 8/2 8/13 9/2 9/27 10/19
Gray Catbird ** 8/2 8/25 9/2 9/17 9/26
Yellow-headed Blackbird * 8/6 8/22 9/2 9/23 10/11

Ending Departures

Species Noticeability Migrants Begin Arriving Rapid Migrant Influx Peak Rapid Migrant Departure Last Migrants Depart
Ash-throated Flycatcher ** - - Before Aug 1 8/3 8/26
Tree Swallow *** - - Before Aug 1 8/3 9/17
Violet-green Swallow *** - - Before Aug 1 8/3 10/23
Yellow-breasted Chat * - - Before Aug 1 8/3 9/25
Hooded Oriole ** - - Before Aug 1 8/3 9/22
Broad-billed Hummingbird * - - Before Aug 1 8/7 9/16
Cliff Swallow *** - - Before Aug 1 8/11 9/14
Sulphur-bellied Flycatcher * - - Before Aug 1 8/20 8/31
Pigeon Guillemot ** - - Before Aug 1 8/27 9/8
Eastern Kingbird *** - 8/2 8/14 8/30 9/10
Broad-tailed Hummingbird *** - - Before Aug 1 9/1 9/26
Common Nighthawk ** - - Before Aug 1 9/2 9/24
Bullock's Oriole ** - - Before Aug 1 9/2 9/14

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Farnsworth and Van Doren

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