Regional Migration Forecast: 9-16 October 2015

Merlin, Luke Seitz

Continental Summary

While the favorable conditions in the West arrive during the middle of the period and bring light to moderate movement featuring Western Grebe, Northern Shoveler, Ruddy Duck, Hermit Thrush, Ruby-crowned Kinglet, White-crowned Sparrow, and Dark-eyed Junco, the East experiences more favorable conditions for several waves of moderate to heavy flights featuring American White Pelican, Merlin, Wilson’s Snipe, Marsh Wren, Sedge Wren, Lincoln’s Sparrow, Savannah Sparrow.

Wondering what species are migrating through right now? Check out our analysis for the past 7 days. Also check out our automated traffic reports describing the density and direction of nocturnal migration in the northeastern US.

[animation name=”forecast-9-16-october-2015″]

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.

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!

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 Northeast	Gulf Coast and Southeast
Great Plains	West

Upper Midwest and Northeast

The rapid passage of a low pressure system brings a pulse of moderate to heavy flights to kickoff the weekend, followed by a blast of warmer air that dampens the intensity of flights through Monday. But another strong frontal boundary moves across the region on Monday, bringing a new wave of moderate to heavy and locally very heavy flights. These flights are heaviest on Monday and Tuesday nights, followed by periods of continuing locally moderate to heavy flights through the remainder of the period. The distribution of these flights will depend heavily on precipitation and its extent and intensity; also, note that this time of the season frequently features large concentrations and fallouts of migrants when waves of birds aloft encounter precipitation and poor visibility conditions.

Wilson’s Snipe, Luke Seitz

Species on the Move

[expand title=”Beginning Arrivals %(%span style=’font-size: 10px; vertical-align: super;’%)%%(%a href=’https://birdcast.org/news/definitions-species-arrivals-regions-and-migration-amounts/#definitions’ target=’_blank’%)%What is this?%(%/a%)%%(%/span%)%” tag=”h3″]
[table sort=”,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving[attr style=”color:green”],Rapid Migrant Influx[attr style=”color:green”],Peak,Rapid Migrant Departure,Last Migrants Depart
Northern Shoveler,**,8/9,10/15,11/10,12/1,12/16
Great Cormorant,*,9/3,11/12,After Dec 31,-,-
Song Sparrow,NA,9/8,10/10,10/20,11/1,-
Pied-billed Grebe,***,9/12,10/10,10/31,11/22,12/11
Dunlin,**,9/15,10/9,10/31,11/20,12/6
Saltmarsh Sparrow,NA,9/15,10/10,10/20,11/5,11/15
Snow Goose,*,9/18,11/21,12/26,-,-
American Black Duck,***,9/19,10/15,11/28,12/14,-
Surf Scoter,**,9/23,10/11,11/8,11/26,12/8
Pine Siskin,***,9/24,10/9,10/29,11/14,11/27
American Coot,***,9/26,10/14,11/6,11/26,12/20
Greater White-fronted Goose,*,9/27,10/13,After Dec 31,-,-
American Woodcock,*,9/27,10/12,10/26,11/13,11/25
Brant,**,9/28,10/11,11/3,-,-
Dark-eyed Junco,****!,9/28,10/14,11/2,-,-
Ruddy Duck,***,9/30,10/17,11/10,11/30,-
Fox Sparrow,***,9/30,10/17,11/8,11/26,12/10
White-winged Scoter,**,10/1,10/19,11/10,11/26,12/8
Redhead,*,10/2,10/18,11/12,-,-
Horned Lark,*,10/2,10/25,After Dec 31,-,-
Gadwall,***,10/3,10/19,11/13,11/30,-
Northern Goshawk,*,10/3,10/16,10/30,11/16,11/28
Northern Saw-whet Owl,*,10/3,10/16,11/1,11/15,11/24
Ring-necked Duck,***,10/5,10/21,11/12,11/27,12/12
Greater Scaup,*,10/6,10/20,12/23,After Dec 31,-
Red-necked Grebe,*,10/6,10/19,11/7,11/22,12/8
Canvasback,*,10/7,10/21,12/17,-,-
Golden Eagle,*,10/8,10/19,11/2,11/16,11/27
Evening Grosbeak,*,10/8,10/20,11/4,11/18,11/28
Lesser Scaup,***,10/9,10/24,11/16,12/1,-
Common Loon,***,10/9,10/25,11/14,11/30,12/12
Northern Shrike,*,10/9,10/22,After Dec 31,-,-
Horned Grebe,***,10/10,10/25,11/14,12/1,12/15
Rough-legged Hawk,*,10/10,12/10,After Dec 31,-,-
Bonaparte’s Gull,***,10/10,10/24,11/11,11/29,12/15
Long-tailed Duck,**,10/11,10/27,After Dec 31,-,-
Short-eared Owl,*,10/11,11/27,12/18,-,-
Snow Bunting,***,10/12,10/23,11/9,11/22,12/1
Common Merganser,**,10/13,11/25,12/22,After Dec 31,-
American Tree Sparrow,***,10/13,10/28,After Dec 31,-,-
Black-legged Kittiwake,*,10/14,10/29,11/19,-,-
Western Kingbird,*,10/15,10/26,11/9,11/26,12/7
Red-throated Loon,**,10/16,11/3,11/22,12/5,12/15

[/table]
[/expand]

[expand title=”Peaking Arrivals” tag=”h3″]
[table sort=”,,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving,Rapid Migrant Influx[attr style=”color:green”],Peak[attr style=”color:green”],Rapid Migrant Departure,Last Migrants Depart
Green-winged Teal,**,8-Aug,22-Aug,27-Oct,22-Nov,10-Dec
Bald Eagle,*,Before July 1,2-Sep,6-Nov,-,-
Lapland Longspur,*,3-Sep,15-Sep,10-Nov,-,-
American Pipit,**,5-Sep,21-Sep,22-Oct,17-Nov,4-Dec
Harris’s Sparrow,*,8-Sep,22-Sep,12-Oct,28-Oct,10-Nov
Savannah Sparrow,***,10-Sep,24-Sep,12-Oct,29-Oct,12-Nov
Eastern Bluebird,***,9-Sep,25-Sep,19-Oct,11-Nov,29-Nov
American Robin,***,11-Sep,25-Sep,13-Oct,9-Nov,26-Nov
Orange-crowned Warbler,**,14-Sep,25-Sep,10-Oct,25-Oct,5-Nov
Nelson’s Sparrow,*,14-Sep,25-Sep,10-Oct,25-Oct,4-Nov
Northern Harrier,**,1-Aug,26-Sep,20-Oct,10-Nov,27-Nov
Yellow-rumped Warbler,****!,16-Sep,27-Sep,13-Oct,28-Oct,9-Nov
Chipping Sparrow,***,18-Sep,27-Sep,9-Oct,30-Oct,13-Nov
Brown Creeper,***,15-Sep,28-Sep,17-Oct,30-Oct,9-Nov
Winter Wren,***,14-Sep,28-Sep,17-Oct,31-Oct,12-Nov
Ruby-crowned Kinglet,****!,16-Sep,28-Sep,14-Oct,30-Oct,11-Nov
Swamp Sparrow,***,16-Sep,28-Sep,14-Oct,30-Oct,12-Nov
Le Conte’s Sparrow,*,17-Sep,29-Sep,15-Oct,31-Oct,12-Nov
White-throated Sparrow,****!,16-Sep,29-Sep,19-Oct,2-Nov,13-Nov
Eastern Meadowlark,**,17-Sep,29-Sep,16-Oct,2-Nov,17-Nov
Golden-crowned Kinglet,***,18-Sep,30-Sep,18-Oct,2-Nov,15-Nov
White-crowned Sparrow,***,19-Sep,30-Sep,15-Oct,30-Oct,10-Nov
Cackling Goose,*,12-Sep,1-Oct,8-Dec,-,-
Wilson’s Snipe,*,6-Aug,1-Oct,16-Oct,2-Nov,19-Nov
Field Sparrow,***,21-Sep,2-Oct,16-Oct,3-Nov,15-Nov
Northern Pintail,*,1-Sep,3-Oct,31-Oct,20-Nov,11-Dec
Hermit Thrush,***,20-Sep,3-Oct,19-Oct,5-Nov,17-Nov
Red-winged Blackbird,***,21-Sep,3-Oct,19-Oct,7-Nov,23-Nov
Rusty Blackbird,**,18-Sep,3-Oct,23-Oct,10-Nov,25-Nov
American Wigeon,**,9-Sep,5-Oct,1-Nov,23-Nov,19-Dec
Vesper Sparrow,*,24-Sep,6-Oct,21-Oct,7-Nov,18-Nov
Purple Finch,***,21-Sep,6-Oct,24-Oct,11-Nov,25-Nov
Common Grackle,**,1-Oct,8-Oct,18-Oct,8-Nov,23-Nov
Dunlin,*,15-Sep,9-Oct,31-Oct,20-Nov,6-Dec
Pine Siskin,***,24-Sep,9-Oct,29-Oct,14-Nov,27-Nov
Pied-billed Grebe,***,12-Sep,10-Oct,31-Oct,22-Nov,11-Dec
Song Sparrow,***,8-Sep,10-Oct,20-Oct,1-Nov,-
Saltmarsh Sparrow,*,15-Sep,10-Oct,20-Oct,5-Nov,15-Nov
Brant,**,28-Sep,11-Oct,3-Nov,-,-
Surf Scoter,*,23-Sep,11-Oct,8-Nov,26-Nov,8-Dec
American Woodcock,*,27-Sep,12-Oct,26-Oct,13-Nov,25-Nov
Greater White-fronted Goose,*,27-Sep,13-Oct,After Dec 31,-,-
American Coot,***,26-Sep,14-Oct,6-Nov,26-Nov,20-Dec
Dark-eyed Junco,****!,28-Sep,14-Oct,2-Nov,-,-
American Black Duck,**,19-Sep,15-Oct,28-Nov,14-Dec,-
Northern Shoveler,**,9-Aug,15-Oct,10-Nov,1-Dec,16-Dec
Northern Goshawk,*,3-Oct,16-Oct,30-Oct,16-Nov,28-Nov
Northern Saw-whet Owl,*,3-Oct,16-Oct,1-Nov,15-Nov,24-Nov
[/table]
[/expand]

[expand title=”Beginning Departures” tag=”h3″]
[table sort=”,,,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving,Rapid Migrant Influx,Peak[attr style=”color:green”],Rapid Migrant Departure[attr style=”color:green”],Last Migrants Depart
Killdeer,***,-,Before July 1,8/2,10/28,11/26
Chimney Swift,***,-,-,8/5,10/10,10/25
Snowy Egret,**,-,Before July 1,8/7,10/15,11/3
Great Blue Heron,***,-,Before July 1,8/10,10/19,12/8
Great Egret,***,Before July 1,7/11,8/12,10/19,11/6
Laughing Gull,**,Before July 1,7/15,8/13,11/12,12/5
Osprey,***,-,Before July 1,8/16,10/15,11/8
Wood Duck,**,Before July 1,7/6,8/18,10/31,11/21
Royal Tern,*,7/12,7/31,8/25,11/10,11/25
Double-crested Cormorant,***,-,-,9/5,11/14,12/7
Blue-winged Teal,**,8/4,8/18,9/9,10/22,11/6
Gray Catbird,***,8/28,9/6,9/17,10/9,10/24
Common Yellowthroat,***,8/25,9/3,9/18,10/9,10/24
Belted Kingfisher,***,Before July 1,7/27,9/20,10/14,-
Sora,*,8/12,8/28,9/21,10/16,10/30
Nashville Warbler,***,8/22,9/5,9/21,10/9,10/23
Red-shouldered Hawk,*,8/24,9/5,9/22,11/13,11/22
Pine Warbler,***,8/22,9/5,9/22,10/11,10/25
Blackpoll Warbler,***,8/27,9/7,9/23,10/9,10/21
Black-throated Blue Warbler,***,8/22,9/6,9/23,10/12,10/26
Indigo Bunting,***,9/9,9/14,9/24,10/11,10/23
Parasitic Jaeger,*,8/23,9/6,9/25,11/15,11/30
Northern Flicker,***,8/28,9/9,9/26,10/13,10/30
Turkey Vulture,***,8/16,9/5,9/28,10/31,11/25
American Kestrel,**,8/27,9/10,9/28,10/19,11/5
Merlin,**,8/19,9/4,9/28,10/26,11/16
Blue Jay,***,8/25,9/8,9/28,10/16,-
Eastern Phoebe,***,9/4,9/16,9/30,10/20,11/3
Blue-headed Vireo,***,9/6,9/19,10/4,10/21,11/2
Clay-colored Sparrow,*,9/5,9/17,10/4,10/21,11/3
Peregrine Falcon,**,9/6,9/20,10/5,10/22,11/3
Sedge Wren,*,9/1,9/20,10/5,10/24,11/1
Marsh Wren,**,9/1,9/20,10/5,10/24,-
Palm Warbler,***,9/4,9/18,10/5,10/22,11/4
Lincoln’s Sparrow,***,9/7,9/19,10/5,10/22,11/2
Eastern Towhee,***,9/12,9/23,10/6,10/25,11/7
Sharp-shinned Hawk,***,8/26,9/10,10/7,11/8,11/22
Cooper’s Hawk,***,8/3,9/10,10/7,11/2,11/16
Yellow-bellied Sapsucker,***,9/10,9/22,10/7,10/21,10/31
Chipping Sparrow,***,9/18,9/27,10/9,10/30,11/13
Orange-crowned Warbler,**,9/14,9/25,10/10,10/25,11/5
Nelson’s Sparrow,*,9/14,9/25,10/10,10/25,11/4
Savannah Sparrow,***,9/10,9/24,10/12,10/29,11/12
Harris’s Sparrow,*,9/8,9/22,10/12,10/28,11/10
American Robin,***,9/11,9/25,10/13,11/9,11/26
Yellow-rumped Warbler,***,9/16,9/27,10/13,10/28,11/9
Ruby-crowned Kinglet,***,9/16,9/28,10/14,10/30,11/11
Swamp Sparrow,***,9/16,9/28,10/14,10/30,11/12
Le Conte’s Sparrow,*,9/17,9/29,10/15,10/31,11/12
White-crowned Sparrow,***,9/19,9/30,10/15,10/30,11/10
Wilson’s Snipe,*,8/6,10/1,10/16,11/2,11/19
Field Sparrow,***,9/21,10/2,10/16,11/3,11/15
Eastern Meadowlark,*,9/17,9/29,10/16,11/2,11/17

[/table]
[/expand]

[expand title=”Ending Departures” tag=”h3″]
[table sort=”,,,,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving,Rapid Migrant Influx,Peak,Rapid Migrant Departure[attr style=”color:green”],Last Migrants Depart[attr style=”color:green”]
Northern Rough-winged Swallow,**,-,-,Before July 1,8/5,10/24
Little Blue Heron,*,Before July 1,7/21,8/9,8/26,10/20
Black-crowned Night-Heron,*,-,Before July 1,7/31,8/27,10/30
Clapper Rail,*,-,Before July 1,8/1,8/28,10/29
Tree Swallow,***,-,-,Before July 1,8/30,11/10
Blue Grosbeak,*,Before July 1,7/18,8/5,8/31,10/17
Black-bellied Plover,*,7/20,8/1,8/20,9/3,12/1
Greater Yellowlegs,**,-,Before July 1,8/20,9/11,11/28
Common Gallinule,*,-,Before July 1,7/26,9/12,11/2
Caspian Tern,**,Before July 1,7/17,8/20,9/14,10/20
Forster’s Tern,*,-,Before July 1,8/17,9/18,11/30
Bobolink,**,8/5,8/16,8/31,9/19,10/15
Eastern Wood-Pewee,***,8/5,8/16,8/29,9/22,10/9
Black Skimmer,*,-,Before July 1,7/23,9/22,10/21
Pectoral Sandpiper,*,Before July 1,7/18,8/16,9/24,11/20
American Golden-Plover,**,8/11,8/23,9/10,9/27,10/13
Cedar Waxwing,***,-,Before July 1,8/17,9/27,11/26
Hooded Warbler,*,8/17,8/26,9/9,9/27,10/10
Blackburnian Warbler,***,8/10,8/23,9/8,9/27,10/9
Chestnut-sided Warbler,***,8/11,8/24,9/9,9/27,10/9
White-eyed Vireo,***,8/17,8/27,9/10,9/28,10/10
Red-eyed Vireo,***,8/15,8/25,9/7,9/28,10/13
Wood Thrush,**,8/23,8/30,9/11,9/28,10/15
Wilson’s Warbler,***,8/15,8/26,9/11,9/28,10/9
Northern Waterthrush,***,7/28,8/24,9/10,9/30,10/12
American Redstart,***,8/12,8/27,9/11,9/30,10/12
Yellow-throated Warbler,*,8/19,8/29,9/12,9/30,10/12
Prairie Warbler,**,8/4,8/21,9/9,9/30,10/13
Sabine’s Gull,*,8/22,9/2,9/16,10/1,10/10
Red-headed Woodpecker,**,8/22,9/1,9/13,10/2,10/14
Philadelphia Vireo,***,8/22,9/3,9/17,10/2,10/12
Ovenbird,***,8/11,8/26,9/13,10/2,10/14
Black-and-white Warbler,***,8/10,8/28,9/13,10/2,10/14
Bay-breasted Warbler,***,8/22,9/2,9/16,10/2,10/13
Broad-winged Hawk,***,8/26,9/5,9/18,10/3,10/14
Yellow-billed Cuckoo,**,-,-,Before July 1,10/3,10/17
Magnolia Warbler,***,8/20,9/1,9/17,10/3,10/15
Summer Tanager,*,8/25,9/3,9/16,10/3,10/15
Scarlet Tanager,***,8/23,9/2,9/15,10/3,10/15
Rose-breasted Grosbeak,***,8/26,9/5,9/16,10/3,10/14
Tennessee Warbler,***,8/16,8/30,9/16,10/4,10/18
Swainson’s Thrush,***,8/24,9/4,9/19,10/5,10/16
Connecticut Warbler,*,8/25,9/5,9/19,10/5,10/16
Cape May Warbler,***,8/22,9/4,9/19,10/5,10/17
Northern Parula,***,8/25,9/6,9/20,10/6,10/18
Tricolored Heron,*,7/14,7/26,8/11,10/7,10/22
House Wren,***,8/28,9/4,9/15,10/7,10/23
Brown Thrasher,***,8/27,9/7,9/21,10/7,10/20
Black-throated Green Warbler,***,8/24,9/5,9/20,10/7,10/19
Yellow-crowned Night-Heron,*,-,Before July 1,8/3,10/8,10/28
Gray-cheeked Thrush,**,8/29,9/8,9/23,10/8,10/19
Gray Catbird,***,8/28,9/6,9/17,10/9,10/24
Nashville Warbler,***,8/22,9/5,9/21,10/9,10/23
Common Yellowthroat,***,8/25,9/3,9/18,10/9,10/24
Blackpoll Warbler,***,8/27,9/7,9/23,10/9,10/21
Chimney Swift,***,-,-,8/5,10/10,10/25
Pine Warbler,***,8/22,9/5,9/22,10/11,10/25
Indigo Bunting,***,9/9,9/14,9/24,10/11,10/23
Black-throated Blue Warbler,***,8/22,9/6,9/23,10/12,10/26
Northern Flicker,***,8/28,9/9,9/26,10/13,10/30
Snowy Egret,**,-,Before July 1,8/7,10/15,11/3
Osprey,***,-,Before July 1,8/16,10/15,11/8
Sora,*,8/12,8/28,9/21,10/16,10/30

[/table]
[/expand]

Gulf Coast and Southeast

Moderare to heavy weekend flights gradually decrease in intensity and extent through Monday, as the favorable weekend conditions give way to more southerly flow. However, Monday and Tuesday see the movement of a frontal boundary through the region, which will bring patterns similar to those occurring to the north of moderate to locally very heavy movements across the region. As the week continues, these flights will continue where favorable conditions persist but will become increasingly localized tower the end of the period.

Sedge Wren, Chris Wood

[expand title=”Beginning Arrivals %(%span style=’font-size: 10px; vertical-align: super;’%)%%(%a href=’https://birdcast.org/news/definitions-species-arrivals-regions-and-migration-amounts/#definitions’ target=’_blank’%)%What is this?%(%/a%)%%(%/span%)%” tag=”h3″]
[table sort=”,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving[attr style=”color:green”],Rapid Migrant Influx[attr style=”color:green”],Peak,Rapid Migrant Departure,Last Migrants Depart
Great Blue Heron,**,7/27,10/21,11/19,-,-
Black Vulture,**,8/25,10/15,After Dec 31,-,-
American Avocet,*,9/1,10/20,11/5,11/24,12/8
Blue-headed Vireo,*,9/1,10/18,12/18,After Dec 31,-
American Bittern,*,9/12,10/14,11/25,-,-
Wilson’s Snipe,**,9/20,10/19,12/15,-,-
Eastern Phoebe,****!,9/22,10/11,10/31,11/12,-
Lincoln’s Sparrow,***,9/24,10/10,10/29,-,-
Red-winged Blackbird,***,9/24,10/13,11/7,11/19,11/30
Double-crested Cormorant,***,9/25,10/17,11/21,11/27,12/1
Common Grackle,***,9/26,10/11,10/25,11/10,11/20
Northern Harrier,***,9/26,10/21,11/17,-,-
Yellow-bellied Sapsucker,***,9/26,10/10,12/17,After Dec 31,-
Herring Gull,**,9/29,12/30,After Dec 31,-,-
Saltmarsh Sparrow,*,9/29,10/12,12/11,After Dec 31,-
Sedge Wren,**,9/30,10/14,12/18,-,-
Ruby-crowned Kinglet,****!,10/1,10/16,12/15,-,-
Eastern Meadowlark,***,10/2,10/16,11/3,11/14,-
Pied-billed Grebe,***,10/2,10/23,11/25,-,-
Virginia Rail,*,10/3,10/15,12/20,-,-
Western Meadowlark,*,10/3,10/19,11/10,11/26,12/8
Swamp Sparrow,***,10/4,10/16,12/16,-,-
American Coot,***,10/5,10/23,11/20,-,-
American White Pelican,***,10/5,10/24,11/19,-,-
Spotted Towhee,**,10/5,10/18,12/16,-,-
Orange-crowned Warbler,***,10/6,10/20,11/12,-,-
Red-tailed Hawk,***,10/6,10/22,-,-,-
Savannah Sparrow,***,10/6,10/19,12/20,-,-
Yellow-rumped Warbler,****!,10/6,10/19,12/20,After Dec 31,-
Golden-crowned Kinglet,***,10/7,10/19,12/14,-,-
White-crowned Sparrow,***,10/7,10/20,12/14,-,-
Winter Wren,***,10/7,10/18,12/14,-,-
Brown Creeper,**,10/8,10/21,12/17,-,-
Franklin’s Gull,**,10/8,10/20,11/5,11/21,12/4
Sandhill Crane,**,10/8,10/27,12/15,After Dec 31,-
Song Sparrow,***,10/8,10/20,12/16,After Dec 31,-
Vesper Sparrow,***,10/8,10/20,12/18,-,-
White-throated Sparrow,****!,10/8,10/20,12/15,-,-
American Wigeon,***,10/9,10/26,11/21,-,-
Dunlin,***,10/9,10/23,11/14,11/26,12/7
Le Conte’s Sparrow,*,10/9,12/3,12/16,-,-
Common Gallinule,**,10/11,10/26,11/18,-,-
Eared Grebe,*,10/11,10/29,After Dec 31,-,-
Field Sparrow,***,10/11,10/22,12/17,-,-
Hermit Thrush,***,10/11,10/22,12/16,-,-
Sprague’s Pipit,*,10/11,10/21,11/7,-,-
Black Scoter,*,10/12,12/30,After Dec 31,-,-
Chipping Sparrow,***,10/12,10/23,12/17,After Dec 31,-
Green-winged Teal,***,10/12,10/26,11/21,-,-
Gadwall,***,10/13,10/27,12/10,-,-
Northern Pintail,***,10/13,10/27,11/19,-,-
Pine Siskin,**,10/13,10/27,After Dec 31,-,-
Purple Finch,*,10/13,10/25,After Dec 31,-,-
American Pipit,***,10/14,10/29,12/11,-,-
Ruddy Duck,***,10/14,10/29,11/25,12/15,-
Brewer’s Blackbird,*,10/15,11/7,After Dec 31,-,-
Dark-eyed Junco,***,10/15,10/29,12/14,-,-
Northern Shoveler,***,10/15,10/29,11/24,-,-
Ring-necked Duck,***,10/15,11/1,12/8,After Dec 31,-
Snow Goose,**,10/16,11/2,12/7,-,-

[/table]
[/expand]

[expand title=”Beginning Departures” tag=”h3″]
[table sort=”,,,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving,Rapid Migrant Influx,Peak[attr style=”color:green”],Rapid Migrant Departure[attr style=”color:green”],Last Migrants Depart
Eastern Wood-Pewee,***,8/16,9/1,9/19,10/12,10/29
Chimney Swift,***,8/27,9/7,9/20,10/11,10/25
Hooded Warbler,***,8/3,9/3,9/20,10/11,10/27
White-eyed Vireo,***,8/19,9/3,9/20,10/11,10/30
Bobolink,*,8/21,9/4,9/21,10/9,10/23
Blackburnian Warbler,**,8/24,9/6,9/22,10/9,10/23
Chestnut-sided Warbler,***,8/25,9/6,9/22,10/10,10/23
Northern Parula,***,8/7,9/3,9/23,10/17,11/2
Prairie Warbler,***,7/23,9/8,9/23,10/13,10/30
Broad-winged Hawk,**,8/28,9/9,9/25,10/13,11/1
Black-and-white Warbler,***,8/18,9/6,9/26,10/18,11/5
Black-billed Cuckoo,*,8/17,9/5,9/26,10/18,11/1
Yellow-throated Warbler,**,7/31,9/6,9/26,10/19,11/4
Ovenbird,***,8/26,9/9,9/27,10/16,11/2
Scarlet Tanager,***,8/31,9/12,9/27,10/15,10/28
American Redstart,***,8/29,9/11,9/28,10/16,10/30
Swainson’s Hawk,*,-,-,9/28,10/23,11/19
Cape May Warbler,**,8/31,9/12,9/29,10/16,10/31
Swainson’s Thrush,***,9/3,9/14,9/29,10/15,10/27
Magnolia Warbler,***,9/1,9/14,10/1,10/19,11/1
Gray-cheeked Thrush,**,9/6,9/17,10/2,10/19,10/30
Wood Thrush,**,9/3,9/16,10/2,10/19,10/31
Tennessee Warbler,***,8/31,9/15,10/3,10/22,11/5
Clay-colored Sparrow,*,9/2,9/15,10/4,10/21,11/4
Nashville Warbler,**,8/30,9/13,10/4,10/26,11/15
Rose-breasted Grosbeak,***,9/7,9/19,10/4,10/21,11/1
Brown Thrasher,***,9/3,9/18,10/5,10/24,11/7
Common Yellowthroat,***,9/2,9/16,10/5,10/23,11/6
Scissor-tailed Flycatcher,***,9/6,9/20,10/5,11/1,11/19
Black-throated Blue Warbler,***,9/5,9/20,10/6,10/25,11/7
Bay-breasted Warbler,*,9/7,9/21,10/7,10/25,11/6
Black-throated Green Warbler,***,9/7,9/22,10/8,10/27,11/9
Peregrine Falcon,**,9/9,9/22,10/8,10/23,11/3
Indigo Bunting,***,9/15,9/25,10/9,10/26,11/8
Blackpoll Warbler,*,9/13,9/25,10/10,10/26,11/6
Gray Catbird,***,9/12,9/24,10/10,10/26,11/7
Merlin,*,9/3,9/17,10/11,11/1,11/18
Painted Bunting,**,9/26,10/3,10/13,10/29,11/8
Northern Rough-winged Swallow,**,-,-,10/14,11/3,11/18

[/table]
[/expand]

[expand title=”Ending Departures” tag=”h3″]
[table sort=”,,,,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving,Rapid Migrant Influx,Peak,Rapid Migrant Departure[attr style=”color:green”],Last Migrants Depart[attr style=”color:green”]
Least Bittern,*,-,-,Before July 1,1-Aug,18-Oct
Blue Grosbeak,**,-,-,Before July 1,26-Aug,1-Nov
Barn Swallow,***,-,Before July 1,8-Aug,8-Sep,5-Nov
Sandwich Tern,*,Before July 1,28-Jul,19-Aug,8-Sep,9-Dec
Stilt Sandpiper,*,5-Jul,21-Jul,15-Aug,14-Sep,21-Nov
Black-necked Stilt,*,14-Jul,27-Jul,11-Aug,16-Sep,28-Nov
Gray Kingbird,*,-,-,14-Aug,16-Sep,11-Oct
Semipalmated Sandpiper,**,Before July 1,15-Jul,23-Aug,16-Sep,15-Oct
Black-chinned Hummingbird,**,-,-,Before July 1,20-Sep,10-Oct
Green Heron,***,-,-,Before July 1,20-Sep,9-Oct
Bell’s Vireo,*,8-Aug,18-Aug,29-Aug,23-Sep,10-Oct
Prothonotary Warbler,**,2-Aug,11-Aug,28-Aug,23-Sep,9-Oct
Baird’s Sandpiper,*,8-Jul,28-Jul,20-Aug,24-Sep,9-Oct
Common Tern,*,Before July 1,20-Jul,22-Aug,24-Sep,9-Nov
Dickcissel,*,10-Aug,19-Aug,2-Sep,24-Sep,16-Oct
Kentucky Warbler,*,4-Aug,15-Aug,2-Sep,24-Sep,9-Oct
Yellow-crowned Night-Heron,*,-,-,Before July 1,24-Sep,21-Oct
Willow Flycatcher,*,5-Aug,19-Aug,5-Sep,25-Sep,9-Oct
Yellow-breasted Chat,**,13-Aug,23-Aug,7-Sep,25-Sep,9-Oct
Canada Warbler,**,13-Aug,24-Aug,9-Sep,26-Sep,9-Oct
Cave Swallow,*,-,-,1-Sep,26-Sep,26-Nov
Mourning Warbler,**,15-Aug,27-Aug,12-Sep,28-Sep,10-Oct
Yellow Warbler,***,29-Jul,16-Aug,7-Sep,29-Sep,15-Oct
Baltimore Oriole,***,18-Aug,30-Aug,14-Sep,30-Sep,10-Oct
Blue-gray Gnatcatcher,***,4-Aug,25-Aug,13-Sep,1-Oct,14-Oct
Least Flycatcher,***,15-Aug,30-Aug,14-Sep,1-Oct,13-Oct
Warbling Vireo,*,23-Aug,3-Sep,17-Sep,3-Oct,14-Oct
Yellow-bellied Flycatcher,*,15-Aug,31-Aug,15-Sep,3-Oct,15-Oct
Yellow-throated Vireo,***,16-Aug,30-Aug,15-Sep,3-Oct,17-Oct
Blue-winged Warbler,**,19-Aug,1-Sep,17-Sep,4-Oct,16-Oct
Summer Tanager,***,19-Aug,31-Aug,15-Sep,4-Oct,19-Oct
Wilson’s Warbler,***,23-Aug,4-Sep,19-Sep,4-Oct,14-Oct
Worm-eating Warbler,**,9-Aug,29-Aug,15-Sep,4-Oct,17-Oct
Acadian Flycatcher,***,20-Aug,1-Sep,16-Sep,5-Oct,18-Oct
Ruby-throated Hummingbird,***,26-Jul,30-Aug,13-Sep,5-Oct,20-Oct
Swainson’s Warbler,*,14-Aug,25-Aug,13-Sep,5-Oct,24-Oct
Veery,***,28-Aug,7-Sep,21-Sep,5-Oct,16-Oct
Chuck-will’s-widow,*,15-Aug,31-Aug,17-Sep,6-Oct,20-Oct
Red-headed Woodpecker,**,24-Aug,4-Sep,18-Sep,6-Oct,11-Nov
Golden-winged Warbler,*,27-Aug,7-Sep,22-Sep,7-Oct,19-Oct
Northern Waterthrush,***,19-Aug,3-Sep,19-Sep,7-Oct,21-Oct
Red-eyed Vireo,***,22-Aug,5-Sep,19-Sep,8-Oct,23-Oct
Blackburnian Warbler,**,24-Aug,6-Sep,22-Sep,9-Oct,23-Oct
Bobolink,*,21-Aug,4-Sep,21-Sep,9-Oct,23-Oct
Chestnut-sided Warbler,***,25-Aug,6-Sep,22-Sep,10-Oct,23-Oct
Chimney Swift,***,27-Aug,7-Sep,20-Sep,11-Oct,25-Oct
Hooded Warbler,***,3-Aug,3-Sep,20-Sep,11-Oct,27-Oct
White-eyed Vireo,***,19-Aug,3-Sep,20-Sep,11-Oct,30-Oct
Eastern Wood-Pewee,***,16-Aug,1-Sep,19-Sep,12-Oct,29-Oct
Broad-winged Hawk,**,28-Aug,9-Sep,25-Sep,13-Oct,1-Nov
Prairie Warbler,***,23-Jul,8-Sep,23-Sep,13-Oct,30-Oct
Scarlet Tanager,***,31-Aug,12-Sep,27-Sep,15-Oct,28-Oct
Swainson’s Thrush,***,3-Sep,14-Sep,29-Sep,15-Oct,27-Oct
American Redstart,***,29-Aug,11-Sep,28-Sep,16-Oct,30-Oct
Cape May Warbler,**,31-Aug,12-Sep,29-Sep,16-Oct,31-Oct
Ovenbird,***,26-Aug,9-Sep,27-Sep,16-Oct,2-Nov
[/table]
[/expand]

Great Plains

A generally unfavorable weekend for migration will see locally moderate flights where conditions permit. Following this period of southerly flow, a pulse of cooler air and northerly winds arrive on Monday and with it comes moderate to very heavy flights across the region. These flights continue, albeit localized to the northern and central Plains, for Tuesday and Wednesday nights. An excellent diurnal flight is likely on Thursday, as favorable conditions prevail; but alas these do not continue into nocturnal periods, and nocturnal flights will not be as extensive as the earlier period movements.

American White Pelican, Ian Davies

Species on the Move

[expand title=”Beginning Arrivals %(%span style=’font-size: 10px; vertical-align: super;’%)%%(%a href=’https://birdcast.org/news/definitions-species-arrivals-regions-and-migration-amounts/#definitions’ target=’_blank’%)%What is this?%(%/a%)%%(%/span%)%” tag=”h3″]
[table sort=”,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving[attr style=”color:green”],Rapid Migrant Influx[attr style=”color:green”],Peak,Rapid Migrant Departure,Last Migrants Depart
Ring-billed Gull,***,7/16,10/23,11/10,11/29,-
Pine Siskin,*,8/23,10/11,12/28,-,-
Purple Finch,*,8/31,12/9,After Dec 31,-,-
Western Grebe,*,9/2,10/18,10/31,11/19,12/3
Yellow-bellied Sapsucker,*,9/7,12/7,After Dec 31,-,-
Winter Wren,*,9/16,10/11,11/3,-,-
Northern Harrier,***,9/24,10/11,10/29,11/12,11/21
Dark-eyed Junco,****!,9/26,10/13,12/29,-,-
Surf Scoter,*,9/26,10/10,10/28,11/15,11/30
Brown Creeper,***,9/27,10/14,12/20,-,-
Golden-crowned Kinglet,***,9/27,10/12,12/15,After Dec 31,-
Thayer’s Gull,*,9/28,10/14,12/11,-,-
Tundra Swan,**,9/28,10/15,10/30,11/18,11/30
Herring Gull,***,9/30,10/22,11/28,After Dec 31,-
Fox Sparrow,***,10/2,10/14,10/30,11/12,11/24
Smith’s Longspur,*,10/4,10/27,12/6,-,-
American Wigeon,***,10/5,10/18,11/4,11/20,12/3
Sandhill Crane,***,10/5,10/16,10/30,11/15,11/25
Greater White-fronted Goose,***,10/6,10/18,11/3,11/15,-
Rusty Blackbird,*,10/6,10/22,11/13,-,-
Green-winged Teal,***,10/7,10/19,11/4,11/19,12/2
Horned Grebe,***,10/7,10/20,11/6,11/24,12/9
Gadwall,****!,10/8,10/20,11/7,11/20,12/1
Northern Pintail,***,10/8,10/20,11/4,11/19,12/1
Northern Shrike,**,10/8,10/19,12/17,-,-
Ring-necked Duck,***,10/8,10/20,11/7,11/19,11/29
Rough-legged Hawk,**,10/8,10/28,After Dec 31,-,-
Ruddy Duck,***,10/8,10/20,11/4,11/20,12/4
Lapland Longspur,**,10/9,10/21,12/21,-,-
Redhead,***,10/10,10/22,11/7,11/24,12/8
Snow Bunting,**,10/10,10/20,11/5,-,-
American Tree Sparrow,***,10/11,10/23,12/21,-,-
Mallard,****!,10/11,10/26,11/17,12/3,-
Northern Shoveler,***,10/11,10/22,11/6,11/22,12/5
Bonaparte’s Gull,***,10/12,10/27,11/14,12/1,12/14
Common Loon,***,10/12,10/24,11/10,11/26,12/10
Short-eared Owl,*,10/12,12/12,After Dec 31,-,-
Canvasback,***,10/13,10/25,11/11,11/27,12/8
Whooping Crane,*,10/13,10/24,11/8,11/24,12/6
Lesser Scaup,***,10/14,10/26,11/13,11/28,12/11
Bald Eagle,***,10/16,11/5,After Dec 31,-,-
Common Redpoll,*,10/16,11/2,After Dec 31,-,-

[/table]
[/expand]

[expand title=”Peaking Arrivals” tag=”h3″]
[table sort=”,,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving,Rapid Migrant Influx[attr style=”color:green”],Peak[attr style=”color:green”],Rapid Migrant Departure,Last Migrants Depart
Greater Yellowlegs,*,-,8/1,10/26,11/13,11/25
Merlin,*,8/16,9/6,10/26,-,-
American White Pelican,**,8/22,9/9,10/16,11/18,12/9
Pied-billed Grebe,***,8/30,9/12,10/31,11/20,12/6
Canada Goose,**,-,9/16,11/25,-,-
Franklin’s Gull,***,9/1,9/16,10/13,11/10,11/25
Ruby-crowned Kinglet,***,9/6,9/21,10/10,10/27,11/10
Marsh Wren,**,9/9,9/22,10/9,10/26,11/9
Red-winged Blackbird,***,9/9,9/22,10/24,11/13,11/27
Lincoln’s Sparrow,***,9/8,9/23,10/10,10/28,11/10
Double-crested Cormorant,***,9/8,9/25,10/22,11/24,12/17
Sharp-shinned Hawk,***,8/31,9/25,10/10,-,-
Yellow-rumped Warbler,****!,9/12,9/25,10/13,10/29,11/10
Sedge Wren,**,9/16,9/26,10/10,10/26,11/6
Nelson’s Sparrow,*,9/17,9/27,10/10,10/25,11/4
Savannah Sparrow,***,9/14,9/27,10/13,10/30,11/12
Sprague’s Pipit,*,9/15,9/27,10/11,10/28,11/8
Hermit Thrush,*,9/15,9/28,10/15,10/30,-
Red-tailed Hawk,***,9/8,9/28,10/29,11/14,11/25
White-throated Sparrow,***,9/13,9/28,10/18,11/3,11/16
Field Sparrow,***,9/18,9/30,10/18,11/6,11/17
Swamp Sparrow,***,9/18,9/30,10/17,11/2,11/13
White-crowned Sparrow,***,9/16,9/30,10/18,11/3,11/15
Eastern Meadowlark,***,9/17,10/1,10/19,11/5,11/17
Le Conte’s Sparrow,***,9/21,10/1,10/17,11/1,11/12
American Coot,***,9/11,10/3,10/29,11/21,12/10
Wilson’s Snipe,**,8/7,10/3,10/18,11/4,11/16
American Pipit,***,9/17,10/4,10/24,11/12,11/26
Harris’s Sparrow,***,9/18,10/6,11/2,-,-
Song Sparrow,***,9/21,10/6,10/25,11/9,11/19
Surf Scoter,*,9/26,10/10,10/28,11/15,11/30
Northern Harrier,***,9/24,10/11,10/29,11/12,11/21
Pine Siskin,*,8/23,10/11,12/28,-,-
Winter Wren,*,9/16,10/11,11/3,-,-
Golden-crowned Kinglet,*,9/27,10/12,12/15,After Dec 31,-
Dark-eyed Junco,***,9/26,10/13,12/29,-,-
Brown Creeper,**,9/27,10/14,12/20,-,-
Fox Sparrow,***,10/2,10/14,10/30,11/12,11/24
Thayer’s Gull,*,9/28,10/14,12/11,-,-
Tundra Swan,*,9/28,10/15,10/30,11/18,11/30
Sandhill Crane,***,10/5,10/16,10/30,11/15,11/25

[/table]
[/expand]

[expand title=”Beginning Departures” tag=”h3″]
[table sort=”,,,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving,Rapid Migrant Influx,Peak[attr style=”color:green”],Rapid Migrant Departure[attr style=”color:green”],Last Migrants Depart
Killdeer,***,Before July 1,7/4,8/2,11/3,11/28
Chimney Swift,***,-,7/25,8/10,10/10,10/25
Wood Duck,**,Before July 1,7/1,8/19,10/27,11/19
Chipping Sparrow,***,-,-,9/1,10/31,11/14
Great Egret,***,-,7/15,9/11,10/16,11/10
Blue-winged Teal,***,8/2,8/18,9/18,10/25,11/13
Peregrine Falcon,*,Before July 1,7/26,9/19,10/10,10/28
Turkey Vulture,***,8/20,9/8,9/22,10/16,10/30
Eastern Phoebe,***,8/27,9/9,9/23,10/14,10/29
Nashville Warbler,***,8/24,9/6,9/23,10/10,10/24
Clay-colored Sparrow,***,8/20,9/3,9/24,10/16,10/31
Osprey,***,8/25,9/7,9/24,10/11,11/12
Common Yellowthroat,***,9/1,9/15,9/25,10/9,10/14
Cooper’s Hawk,**,8/8,9/2,9/25,10/20,11/10
American Golden-Plover,*,8/6,9/3,9/27,10/23,11/19
Palm Warbler,*,8/31,9/11,9/27,10/13,10/25
Scissor-tailed Flycatcher,***,9/6,9/16,9/28,10/19,11/2
Black-bellied Plover,*,7/20,7/30,9/29,11/15,11/28
Sora,*,8/18,9/6,9/29,10/22,11/5
Red-shouldered Hawk,*,8/11,9/5,9/30,10/26,-
Indigo Bunting,***,9/1,9/15,10/1,10/10,10/21
Orange-crowned Warbler,***,9/3,9/17,10/3,10/21,11/2
Northern Flicker,***,8/30,9/13,10/7,10/26,11/5
Common Grackle,***,9/12,9/23,10/8,10/31,11/16
Spotted Towhee,**,9/10,9/22,10/8,10/28,11/10
Vesper Sparrow,***,9/9,9/23,10/8,10/26,11/8
Western Meadowlark,***,9/11,9/21,10/8,11/3,11/19
Marsh Wren,**,9/9,9/22,10/9,10/26,11/9
Lincoln’s Sparrow,***,9/8,9/23,10/10,10/28,11/10
Nelson’s Sparrow,*,9/17,9/27,10/10,10/25,11/4
Ruby-crowned Kinglet,***,9/6,9/21,10/10,10/27,11/10
Sedge Wren,**,9/16,9/26,10/10,10/26,11/6
Sprague’s Pipit,*,9/15,9/27,10/11,10/28,11/8
Franklin’s Gull,***,9/1,9/16,10/13,11/10,11/25
Savannah Sparrow,***,9/14,9/27,10/13,10/30,11/12
Yellow-rumped Warbler,***,9/12,9/25,10/13,10/29,11/10
Hermit Thrush,*,9/15,9/28,10/15,10/30,-
American White Pelican,**,8/22,9/9,10/16,11/18,12/9

[/table]
[/expand]

[expand title=”Ending Departures” tag=”h3″]
[table sort=”,,,,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving,Rapid Migrant Influx,Peak,Rapid Migrant Departure[attr style=”color:green”],Last Migrants Depart[attr style=”color:green”]
Northern Rough-winged Swallow,**,-,-,Before July 1,7/15,10/19
Pectoral Sandpiper,**,Before July 1,7/20,8/10,8/26,10/20
Tree Swallow,**,-,-,Before July 1,9/4,11/8
Forster’s Tern,**,Before July 1,7/26,8/20,9/15,10/26
Semipalmated Plover,**,7/1,7/21,8/19,9/17,10/11
Green Heron,***,Before July 1,7/2,8/11,9/18,10/10
Lesser Yellowlegs,**,-,Before July 1,8/21,9/18,11/15
Red-headed Woodpecker,***,7/31,8/13,8/27,9/23,10/13
Rose-breasted Grosbeak,**,8/12,8/22,9/4,9/25,10/10
Black-crowned Night-Heron,*,-,-,9/5,9/26,10/12
Say’s Phoebe,**,8/12,8/25,9/7,9/28,10/11
Western Tanager,*,8/19,8/29,9/11,9/28,10/9
Northern Parula,**,8/17,8/27,9/11,9/29,10/11
Philadelphia Vireo,**,8/15,8/27,9/12,9/29,10/10
Swainson’s Thrush,***,8/18,8/30,9/13,9/29,10/10
White-eyed Vireo,**,8/19,8/28,9/10,9/29,10/11
Brown Thrasher,***,8/19,8/30,9/11,9/30,10/12
Caspian Tern,*,7/1,8/15,9/11,9/30,10/13
Cattle Egret,*,-,-,8/5,9/30,11/3
Red-necked Phalarope,*,7/1,8/25,9/9,9/30,10/14
Tennessee Warbler,**,8/7,8/22,9/10,9/30,10/16
Yellow-headed Blackbird,***,8/15,9/5,9/15,9/30,10/12
Gray Catbird,***,8/18,8/30,9/11,10/1,10/14
White-faced Ibis,*,Before July 1,8/14,9/4,10/1,10/27
Snowy Egret,**,Before July 1,7/5,8/18,10/2,10/24
House Wren,***,8/25,9/1,9/10,10/3,10/19
Sanderling,*,7/1,7/28,9/10,10/3,10/21
Swainson’s Hawk,***,7/28,8/21,9/7,10/4,10/21
Blue-headed Vireo,***,8/19,9/1,9/18,10/5,10/18
Summer Tanager,***,8/28,9/6,9/18,10/5,10/17
Mourning Dove,***,-,-,9/1,10/6,10/26
Black-throated Green Warbler,*,8/17,9/1,9/19,10/7,10/22
Broad-winged Hawk,**,8/28,9/7,9/20,10/7,10/19
Common Tern,*,-,-,9/1,10/7,11/1
Common Yellowthroat,***,9/1,9/15,9/25,10/9,10/14
Chimney Swift,***,-,7/25,8/10,10/10,10/25
Indigo Bunting,***,9/1,9/15,10/1,10/10,10/21
Nashville Warbler,***,8/24,9/6,9/23,10/10,10/24
Peregrine Falcon,*,Before July 1,7/26,9/19,10/10,10/28
Osprey,***,8/25,9/7,9/24,10/11,11/12
Palm Warbler,**,8/31,9/11,9/27,10/13,10/25
Eastern Phoebe,***,8/27,9/9,9/23,10/14,10/29
Clay-colored Sparrow,***,8/20,9/3,9/24,10/16,10/31
Great Egret,***,-,7/15,9/11,10/16,11/10
Turkey Vulture,***,8/20,9/8,9/22,10/16,10/30

[/table]
[/expand]

West

An unfavorable start to the period gives way to much more favorable conditions by Monday, when light to moderate movements are likely from the Desert Southwest east and north along the Rockies. Some of the movements east of the Rockies may be locally heavy. While these favorable conditions persist in the Rockies and immediate environs, allowing similarly intense movements to continue, the remainder of the region experiences marginal conditions where primarily light movements will occur. By the end of the period, the entire region experiences similar marginal conditions at region wide extents, and light movements will be the norm. Note that some areas, particularly in the Four Corners and portions of the northern and central Rockies, will see more favorable conditions and more intense, primarily moderate, movements.

Western Grebe, Chris Wood

Species on the Move

[expand title=”Beginning Arrivals %(%span style=’font-size: 10px; vertical-align: super;’%)%%(%a href=’https://birdcast.org/news/definitions-species-arrivals-regions-and-migration-amounts/#definitions’ target=’_blank’%)%What is this?%(%/a%)%%(%/span%)%” tag=”h3″]
[table sort=”,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving[attr style=”color:green”],Rapid Migrant Influx[attr style=”color:green”],Peak,Rapid Migrant Departure,Last Migrants Depart
Ring-billed Gull,**,Before July 1,11/2,11/22,12/5,-
Pied-billed Grebe,**,7/27,10/18,11/11,11/29,-
Northern Harrier,**,8/12,10/29,11/20,-,-
Red-necked Grebe,*,8/26,10/20,11/6,11/22,-
American Wigeon,***,9/3,10/19,11/20,12/4,12/16
American Coot,***,9/5,10/13,11/17,12/5,-
American Robin,*,9/6,12/2,12/23,-,-
Western Grebe,***,9/15,10/14,11/5,11/24,12/9
Harris’s Sparrow,*,9/18,10/14,After Dec 31,-,-
Ruddy Duck,***,9/19,10/13,11/14,-,-
White-winged Scoter,*,9/20,10/22,11/10,11/26,12/7
Dark-eyed Junco,***,9/21,10/9,12/16,After Dec 31,-
Horned Grebe,***,9/21,10/18,11/11,11/26,12/6
Dunlin,**,9/22,10/11,11/6,11/24,12/8
Herring Gull,**,9/22,10/24,11/26,12/11,After Dec 31
Ring-necked Duck,***,9/24,10/17,12/7,-,-
Bald Eagle,**,9/28,10/22,After Dec 31,-,-
Eurasian Wigeon,*,9/28,10/24,After Dec 31,-,-
Surf Scoter,**,9/28,10/21,11/12,-,-
Swamp Sparrow,*,9/29,10/14,12/17,-,-
Northern Shrike,*,9/30,10/14,12/13,-,-
Common Merganser,*,10/1,11/1,12/15,-,-
Canada Goose,NA,10/1,11/1,11/25,-,-
Ferruginous Hawk,*,10/2,10/31,After Dec 31,-,-
Glaucous-winged Gull,**,10/3,10/26,11/20,-,-
Redhead,**,10/3,10/21,11/14,12/3,After Dec 31
Mew Gull,**,10/4,10/22,11/17,-,-
Greater Scaup,**,10/5,10/21,After Dec 31,-,-
Thayer’s Gull,*,10/5,10/24,After Dec 31,-,-
Gadwall,***,10/6,10/25,11/18,-,-
Clark’s Grebe,*,10/7,10/20,11/6,11/23,-
Common Loon,***,10/7,10/21,11/7,11/24,-
Rough-legged Hawk,*,10/7,10/30,After Dec 31,-,-
Lesser Scaup,***,10/9,10/25,11/20,-,-
Rock Sandpiper,*,10/10,10/24,11/14,-,-
American Tree Sparrow,*,10/11,10/24,11/15,11/26,12/7
Canvasback,***,10/11,10/28,11/23,12/4,12/11
Snow Bunting,*,10/13,10/24,11/10,-,-
Bonaparte’s Gull,***,10/13,10/24,11/10,11/26,12/9
Long-tailed Duck,*,10/14,10/28,11/18,12/1,12/10
Bufflehead,****!,10/15,10/29,11/22,12/3,12/10
Rusty Blackbird,*,10/16,10/30,11/18,12/2,12/12

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[expand title=”Peaking Arrivals” tag=”h3″]
[table sort=”,,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving,Rapid Migrant Influx[attr style=”color:green”],Peak[attr style=”color:green”],Rapid Migrant Departure,Last Migrants Depart
California Gull,*,Before July 1,14-Jul,9-Nov,26-Nov,10-Dec
Green-winged Teal,**,7-Aug,20-Aug,21-Nov,-,-
Northern Shoveler,***,5-Aug,20-Aug,22-Nov,-,-
Northern Pintail,**,9-Aug,22-Aug,19-Nov,-,-
Belted Kingfisher,**,15-Aug,5-Sep,27-Oct,10-Nov,-
Black Phoebe,**,20-Aug,6-Sep,30-Oct,-,-
Sharp-shinned Hawk,*,23-Aug,9-Sep,22-Oct,8-Nov,-
Red-winged Blackbird,**,24-Aug,11-Sep,10-Oct,31-Oct,21-Nov
Red-tailed Hawk,***,18-Aug,12-Sep,After Dec 31,-,-
Merlin,*,29-Aug,13-Sep,22-Dec,-,-
American Pipit,**,30-Aug,14-Sep,7-Nov,-,-
White-crowned Sparrow,****!,4-Sep,20-Sep,14-Oct,26-Oct,6-Nov
Red-naped Sapsucker,*,8-Sep,22-Sep,9-Oct,24-Oct,4-Nov
Fox Sparrow,***,9-Sep,24-Sep,19-Oct,-,-
Sandhill Crane,*,12-Sep,24-Sep,18-Nov,3-Dec,12-Dec
Yellow-rumped Warbler,****!,2-Sep,26-Sep,17-Oct,29-Oct,8-Nov
Marsh Wren,*,19-Aug,27-Sep,30-Oct,21-Nov,-
Golden-crowned Sparrow,***,12-Sep,27-Sep,21-Oct,30-Oct,7-Nov
Northern Flicker,***,6-Sep,27-Sep,20-Oct,5-Nov,20-Nov
Western Meadowlark,**,10-Sep,27-Sep,22-Oct,8-Nov,6-Dec
Varied Thrush,**,14-Sep,29-Sep,After Dec 31,-,-
Eared Grebe,***,30-Aug,29-Sep,9-Nov,29-Nov,11-Dec
Chestnut-collared Longspur,*,17-Sep,3-Oct,25-Oct,12-Nov,30-Nov
Golden-crowned Kinglet,**,14-Sep,3-Oct,26-Oct,11-Nov,21-Nov
Ruby-crowned Kinglet,***,15-Sep,3-Oct,16-Dec,-,-
White-throated Sparrow,**,17-Sep,3-Oct,25-Oct,-,-
Cackling Goose,**,18-Sep,5-Oct,22-Nov,7-Dec,19-Dec
Hermit Thrush,***,21-Sep,5-Oct,28-Oct,7-Nov,15-Nov
Dark-eyed Junco,***,21-Sep,9-Oct,16-Dec,After Dec 31,-
Dunlin,**,22-Sep,11-Oct,6-Nov,24-Nov,8-Dec
American Coot,***,5-Sep,13-Oct,17-Nov,5-Dec,-
Ruddy Duck,***,19-Sep,13-Oct,14-Nov,-,-
Harris’s Sparrow,*,18-Sep,14-Oct,After Dec 31,-,-
Northern Shrike,*,30-Sep,14-Oct,13-Dec,-,-
Swamp Sparrow,*,29-Sep,14-Oct,17-Dec,-,-
Western Grebe,***,15-Sep,14-Oct,5-Nov,24-Nov,9-Dec
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[expand title=”Ending Departures” tag=”h3″]
[table sort=”,,,,,asc” tablesorter=”true”]
Species,Noticeability[attr style=”color:orange”],Migrants Begin Arriving,Rapid Migrant Influx,Peak,Rapid Migrant Departure[attr style=”color:green”],Last Migrants Depart[attr style=”color:green”]
Violet-green Swallow,**,-,-,Before July 1,26-Jul,15-Oct
Lucy’s Warbler,*,-,-,Before July 1,27-Jul,16-Oct
Hermit Warbler,*,28-Jul,6-Aug,22-Aug,7-Sep,26-Oct
Ruddy Turnstone,*,Before July 1,13-Jul,21-Aug,8-Sep,5-Dec
Greater Yellowlegs,*,Before July 1,10-Jul,30-Aug,14-Sep,11-Dec
Lesser Yellowlegs,*,Before July 1,9-Aug,26-Aug,14-Sep,20-Oct
Blue Grosbeak,**,Before July 1,1-Jul,31-Jul,16-Sep,12-Oct
Osprey,**,4-Aug,14-Aug,26-Aug,16-Sep,18-Oct
Lazuli Bunting,**,5-Aug,11-Aug,20-Aug,17-Sep,10-Oct
Green Heron,*,-,Before July 1,30-Aug,23-Sep,18-Oct
Nashville Warbler,**,2-Aug,16-Aug,4-Sep,23-Sep,12-Oct
Sage Thrasher,*,-,-,29-Aug,24-Sep,20-Oct
Swainson’s Thrush,**,19-Aug,26-Aug,8-Sep,24-Sep,10-Oct
Wandering Tattler,*,Before July 1,20-Jul,24-Aug,24-Sep,16-Oct
Yellow-headed Blackbird,**,12-Aug,21-Aug,2-Sep,24-Sep,11-Oct
Barn Swallow,***,-,Before July 1,23-Aug,25-Sep,12-Oct
White-faced Ibis,**,Before July 1,4-Jul,26-Aug,25-Sep,16-Oct
American White Pelican,*,Before July 1,17-Aug,1-Sep,26-Sep,11-Dec
Bell’s Vireo,*,-,Before July 1,28-Jul,26-Sep,12-Oct
Western Wood-Pewee,***,-,-,7-Aug,26-Sep,12-Oct
Swainson’s Hawk,**,-,26-Jul,14-Aug,27-Sep,13-Oct
American Avocet,*,-,Before July 1,31-Aug,28-Sep,20-Oct
Cinnamon Teal,*,31-Jul,16-Aug,5-Sep,28-Sep,14-Oct
Brewer’s Sparrow,**,6-Aug,21-Aug,8-Sep,28-Sep,11-Oct
Western Tanager,***,15-Aug,25-Aug,7-Sep,28-Sep,12-Oct
Wilson’s Warbler,***,8-Aug,22-Aug,8-Sep,28-Sep,12-Oct
House Wren,**,14-Aug,24-Aug,9-Sep,29-Sep,8-Nov
Warbling Vireo,***,14-Aug,25-Aug,9-Sep,29-Sep,13-Oct
Arctic Tern,*,18-Jul,8-Aug,5-Sep,30-Sep,17-Oct
Blue-gray Gnatcatcher,*,9-Aug,24-Aug,12-Sep,30-Sep,13-Oct
Killdeer,**,4-Aug,19-Aug,8-Sep,30-Sep,20-Nov
Green-tailed Towhee,**,21-Aug,1-Sep,14-Sep,1-Oct,12-Oct
Common Tern,*,19-Aug,1-Sep,16-Sep,3-Oct,16-Oct
Franklin’s Gull,*,Before July 1,1-Jul,3-Sep,3-Oct,1-Nov
Summer Tanager,*,-,-,27-Jul,3-Oct,15-Oct
Vesper Sparrow,**,17-Aug,30-Aug,15-Sep,3-Oct,17-Oct
Yellow Warbler,***,5-Aug,19-Aug,8-Sep,3-Oct,21-Oct
Pacific-slope Flycatcher,***,19-Aug,28-Aug,12-Sep,4-Oct,20-Oct
Elegant Tern,*,Before July 1,21-Jul,15-Sep,5-Oct,26-Nov
Clay-colored Sparrow,*,14-Aug,28-Aug,17-Sep,6-Oct,2-Nov
Sabine’s Gull,**,15-Aug,4-Sep,21-Sep,6-Oct,17-Oct
Turkey Vulture,***,23-Aug,3-Sep,14-Sep,6-Oct,19-Oct
Heermann’s Gull,*,-,Before July 1,16-Sep,7-Oct,1-Dec
Vaux’s Swift,***,26-Aug,5-Sep,16-Sep,7-Oct,21-Oct
Common Yellowthroat,***,17-Aug,29-Aug,16-Sep,9-Oct,28-Oct
Chipping Sparrow,***,7-Aug,20-Aug,8-Sep,11-Oct,5-Nov
Pectoral Sandpiper,**,17-Aug,1-Sep,20-Sep,11-Oct,28-Oct
Orange-crowned Warbler,***,12-Aug,2-Sep,22-Sep,12-Oct,29-Oct
Mountain Bluebird,*,6-Sep,12-Sep,22-Sep,15-Oct,29-Oct
Brewer’s Blackbird,**,23-Aug,8-Sep,28-Sep,16-Oct,10-Nov
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