Bufflehead. John Woods/Macaulay Library. eBird S32469891.
Continental Summary
Scattered light movements will be the norm for this late season period with higher intensities and extents to end the week that will feature Tundra Swan, Green-winged Teal, Gadwall, Lesser Scaup, Pied-billed Grebe, Eared Grebe, Say’s Phoebe, and American Pipit, while the East sees a significant early and late period push of moderate to locally heavy movements featuring Redhead, Lesser Scaup, Common Loon, Horned Grebe, Bonaparte’s Gull, Hermit Thrush, and Field Sparrow.
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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Quick Links to Regions
Upper Midwest and Northeast
The recent passage of a cold front heralds what is likely to be one of the last moderate to heavy flights of the fall season across the region to begin the weekend. This will include a nice potential for morning flight from the mid Atlantic north and east through Maine. Following these movements will be several days of greatly reduced and localized flights, as unfavorable winds move into the region. Another frontal boundary forming just east of the region brings a change late in the period, with moderate flights likely on Thursday and Friday though mostly east of the Great Lakes and Appalachians.
Common Loon. Irina Shulgina/Macaulay Library. eBird S32449900.
Species on the Move
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Great Cormorant
*
9/5
11/16
After Nov 30
-
-
Common Merganser
**
10/16
11/29
After Nov 30
-
-
Common Goldeneye
***
10/24
11/29
After Nov 30
-
-
Snow Goose
**
11/16
11/29
After Nov 30
-
-
Cackling Goose
*
11/18
11/29
After Nov 30
-
-
Peaking Arrivals
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
American Black Duck
**
9/23
10/14
After Nov 30
-
-
Gadwall
**
10/4
10/19
11/12
11/22
After Nov 30
Redhead
*
9/28
10/19
11/14
11/18
11/20
Greater Scaup
*
10/9
10/22
After Nov 30
-
-
Canvasback
*
10/12
10/23
After Nov 30
-
-
Lesser Scaup
**
10/12
10/25
11/14
11/20
After Nov 30
Bonaparte's Gull
**
10/12
10/25
11/11
After Nov 30
-
Common Loon
***
10/14
10/26
11/11
11/24
After Nov 30
Horned Grebe
***
10/15
10/26
11/11
11/17
11/22
Long-tailed Duck
**
10/18
10/27
After Nov 30
-
-
Red-throated Loon
**
10/11
10/28
After Nov 30
-
-
Bufflehead
***
10/20
10/30
11/22
After Nov 30
-
Red-breasted Merganser
***
10/16
11/1
After Nov 30
-
-
Hooded Merganser
***
10/20
11/3
After Nov 30
-
-
Tundra Swan
**
10/30
11/9
11/22
After Nov 30
-
Great Cormorant
*
9/5
11/16
After Nov 30
-
-
Beginning Departures
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Laughing Gull
**
-
8/2
8/14
After Nov 30
-
Greater Yellowlegs
**
-
8/2
8/20
11/11
After Nov 30
Eastern Bluebird
**
9/12
9/27
10/18
11/12
After Nov 30
Green-winged Teal
***
8/13
10/11
10/24
After Nov 30
-
American Pipit
**
9/10
9/22
10/24
11/11
11/25
Pine Siskin
**
9/27
10/10
10/28
11/11
After Nov 30
Dunlin
**
9/13
10/17
10/29
11/11
11/22
Pied-billed Grebe
***
9/4
10/11
10/31
11/20
After Nov 30
Surf Scoter
*
9/25
10/19
11/4
11/12
11/17
Red-necked Grebe
*
10/11
10/23
11/5
11/15
11/23
White-winged Scoter
*
10/12
10/24
11/6
11/13
11/18
Northern Shoveler
*
8/9
10/12
11/8
After Nov 30
-
Ruddy Duck
**
9/29
10/17
11/8
11/23
After Nov 30
Ring-necked Duck
*
10/7
10/23
11/9
11/17
11/24
Fox Sparrow
**
9/28
10/16
11/9
After Nov 30
-
Dark-eyed Junco
*
9/28
10/14
11/10
11/16
11/22
Common Loon
**
10/14
10/26
11/11
11/24
After Nov 30
Horned Grebe
*
10/15
10/26
11/11
11/17
11/22
Bonaparte's Gull
**
10/12
10/25
11/11
After Nov 30
-
Gadwall
*
10/4
10/19
11/12
11/22
After Nov 30
Redhead
*
9/28
10/19
11/14
11/18
11/20
Lesser Scaup
*
10/12
10/25
11/14
11/20
After Nov 30
Ending Departures
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Black-bellied Plover
*
-
8/2
8/18
8/27
After Nov 30
Pectoral Sandpiper
**
8/11
8/17
8/23
9/7
11/13
Cedar Waxwing
***
-
8/2
8/17
9/25
After Nov 30
Forster's Tern
*
-
8/2
8/16
9/26
After Nov 30
Red-breasted Nuthatch
*
8/12
9/4
10/2
10/17
After Nov 30
Great Blue Heron
***
-
8/2
8/15
10/20
After Nov 30
Killdeer
***
-
-
Before Aug 1
10/25
11/24
Turkey Vulture
***
8/28
9/6
9/19
10/27
After Nov 30
Wilson's Snipe
*
9/24
10/3
10/16
10/29
After Nov 30
Savannah Sparrow
***
9/12
9/26
10/12
10/29
11/12
Sharp-shinned Hawk
***
8/31
9/10
10/17
10/30
After Nov 30
Blue Jay
***
8/23
9/8
9/28
10/30
11/26
Eastern Meadowlark
**
9/17
10/2
10/16
10/30
11/11
White-throated Sparrow
***
9/18
9/30
10/18
10/31
11/12
Wood Duck
***
-
8/2
8/21
11/2
11/22
Northern Harrier
**
8/2
10/9
10/21
11/2
11/13
Golden-crowned Kinglet
***
9/22
10/1
10/15
11/6
11/18
Red-winged Blackbird
***
9/24
10/4
10/18
11/6
After Nov 30
Northern Pintail
*
9/5
10/12
10/27
11/7
After Nov 30
Common Grackle
***
10/2
10/8
10/18
11/7
After Nov 30
American Robin
***
9/13
9/24
10/13
11/8
After Nov 30
Purple Finch
***
9/26
10/8
10/24
11/8
After Nov 30
Brant
*
10/1
10/13
10/30
11/8
11/15
Royal Tern
*
-
8/2
8/21
11/8
After Nov 30
American Wigeon
*
9/23
10/8
10/28
11/10
11/29
Red-shouldered Hawk
*
8/26
9/5
9/21
11/10
11/19
Rusty Blackbird
**
9/19
10/3
10/23
11/10
After Nov 30
Greater Yellowlegs
***
-
8/2
8/20
11/11
After Nov 30
Dunlin
**
9/13
10/17
10/29
11/11
11/22
Pine Siskin
**
9/27
10/10
10/28
11/11
After Nov 30
American Pipit
**
9/10
9/22
10/24
11/11
11/25
Eastern Bluebird
***
9/12
9/27
10/18
11/12
After Nov 30
Surf Scoter
*
9/25
10/19
11/4
11/12
11/17
White-winged Scoter
*
10/12
10/24
11/6
11/13
11/18
Red-necked Grebe
*
10/11
10/23
11/5
11/15
11/23
Dark-eyed Junco
*
9/28
10/14
11/10
11/16
11/22
Ring-necked Duck
*
10/7
10/23
11/9
11/17
11/24
Horned Grebe
*
10/15
10/26
11/11
11/17
11/22
Redhead
*
9/28
10/19
11/14
11/18
11/20
Gulf Coast and Southeast
Widespread moderate to heavy flights kick off the weekend, becoming gradually more restricted over the days that follow. The organization of a new frontal boundary spawns a change, with another pulse of moderate flights corresponding to the movements of this boundary off to the east. However, these flights will be primarily east of the Mississippi River, reaching their greatest extent and intensity on Wednesday night.
Wilson’s Snipe. Jade Hems/Macaulay Library. eBird S32460678.
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Herring Gull
**
9/22
11/29
After Nov 30
-
-
Horned Grebe
***
10/30
11/11
After Nov 30
-
-
Ring-billed Gull
***
10/30
11/24
After Nov 30
-
-
Bonaparte's Gull
**
11/1
11/13
After Nov 30
-
-
Hooded Merganser
***
11/2
11/11
After Nov 30
-
-
Bufflehead
***
11/4
11/13
After Nov 30
-
-
Red-breasted Merganser
***
11/6
11/19
After Nov 30
-
-
Harris's Sparrow
**
11/7
11/29
After Nov 30
-
-
Peaking Arrivals
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Bald Eagle
**
9/3
9/15
11/21
After Nov 30
-
American Kestrel
***
9/12
9/29
11/12
After Nov 30
-
Black Vulture
**
8/28
9/30
11/18
After Nov 30
-
American Bittern
*
9/14
10/9
11/12
After Nov 30
-
Double-crested Cormorant
***
9/27
10/11
11/22
After Nov 30
-
Ruby-crowned Kinglet
***
9/26
10/14
11/16
11/24
After Nov 30
Wilson's Snipe
**
9/30
10/15
11/14
After Nov 30
-
Spotted Towhee
*
10/5
10/16
After Nov 30
-
-
Winter Wren
*
10/7
10/17
After Nov 30
-
-
Golden-crowned Kinglet
***
10/7
10/17
11/15
After Nov 30
-
Brown Creeper
*
10/6
10/18
11/23
After Nov 30
-
Yellow-rumped Warbler
***
10/6
10/18
After Nov 30
-
-
Song Sparrow
***
10/7
10/19
11/17
After Nov 30
-
White-throated Sparrow
***
10/9
10/19
11/18
After Nov 30
-
Western Meadowlark
*
10/2
10/19
11/12
After Nov 30
-
Chipping Sparrow
***
10/13
10/24
After Nov 30
-
-
Hermit Thrush
***
10/15
10/25
11/11
11/17
11/21
Field Sparrow
***
10/14
10/25
11/14
After Nov 30
-
Red-tailed Hawk
***
10/1
10/26
11/20
After Nov 30
-
Dunlin
**
10/10
10/26
11/12
After Nov 30
-
Northern Harrier
***
9/16
10/27
11/16
After Nov 30
-
Common Gallinule
**
10/18
10/28
11/11
11/19
After Nov 30
Sandhill Crane
**
10/8
10/29
After Nov 30
-
-
Gadwall
***
10/17
10/30
11/19
After Nov 30
-
American Wigeon
***
10/10
10/30
11/18
After Nov 30
-
American White Pelican
***
9/29
10/30
11/15
11/21
After Nov 30
Pine Siskin
*
10/14
10/30
After Nov 30
-
-
Northern Pintail
**
10/18
10/31
11/18
After Nov 30
-
Pied-billed Grebe
***
9/25
10/31
11/20
After Nov 30
-
Ruddy Duck
***
10/18
11/1
11/19
After Nov 30
-
Dark-eyed Junco
***
10/18
11/2
After Nov 30
-
-
Redhead
***
10/21
11/3
11/19
After Nov 30
-
Northern Shoveler
***
10/22
11/4
11/19
After Nov 30
-
Green-winged Teal
***
10/11
11/4
11/18
After Nov 30
-
Eared Grebe
*
10/21
11/4
11/24
After Nov 30
-
Northern Gannet
*
10/19
11/4
After Nov 30
-
-
American Pipit
***
10/22
11/4
11/20
After Nov 30
-
Snow Goose
**
10/23
11/5
After Nov 30
-
-
Ring-necked Duck
***
10/20
11/5
11/23
After Nov 30
-
Great Blue Heron
***
8/2
11/5
11/16
After Nov 30
-
Ross's Goose
*
10/24
11/7
After Nov 30
-
-
Canvasback
*
10/28
11/8
After Nov 30
-
-
Common Loon
**
10/27
11/8
After Nov 30
-
-
Lesser Scaup
***
10/29
11/9
After Nov 30
-
-
Hooded Merganser
***
11/2
11/11
After Nov 30
-
-
Horned Grebe
**
10/30
11/11
After Nov 30
-
-
Bufflehead
***
11/4
11/13
After Nov 30
-
-
Bonaparte's Gull
**
11/1
11/13
After Nov 30
-
-
Beginning Departures
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Piping Plover
*
-
8/2
8/20
After Nov 30
-
Cooper's Hawk
**
8/2
9/21
10/17
After Nov 30
-
Common Grackle
***
9/29
10/9
10/21
After Nov 30
-
Belted Kingfisher
**
8/13
9/18
10/22
After Nov 30
-
Red-breasted Nuthatch
*
10/2
10/11
10/23
After Nov 30
-
Brown-headed Cowbird
*
9/15
9/27
10/23
After Nov 30
-
Sharp-shinned Hawk
**
9/8
9/24
10/28
11/15
After Nov 30
House Wren
***
9/23
10/6
10/28
11/12
After Nov 30
Eastern Phoebe
***
9/25
10/9
10/30
After Nov 30
-
Black-bellied Plover
*
-
8/2
10/31
After Nov 30
-
Lincoln's Sparrow
**
9/23
10/4
10/31
11/13
11/21
Marsh Wren
*
9/20
10/3
11/1
11/18
After Nov 30
Tree Swallow
*
9/24
10/3
11/2
11/14
11/22
Sedge Wren
*
9/28
10/11
11/2
After Nov 30
-
Eastern Meadowlark
**
10/2
10/15
11/3
11/23
After Nov 30
Sora
*
8/29
9/21
11/7
11/17
After Nov 30
American Avocet
*
8/2
10/22
11/7
After Nov 30
-
Franklin's Gull
**
10/14
10/26
11/7
11/25
After Nov 30
Caspian Tern
**
-
8/2
11/7
After Nov 30
-
Vesper Sparrow
*
10/12
10/23
11/7
11/15
11/22
Blue-winged Teal
**
8/8
8/26
11/8
11/29
After Nov 30
Black-bellied Whistling-Duck
**
10/24
10/30
11/9
After Nov 30
-
Black-necked Stilt
**
10/21
10/29
11/9
After Nov 30
-
Red-winged Blackbird
***
9/22
10/4
11/9
After Nov 30
-
Orange-crowned Warbler
**
10/17
10/28
11/10
11/18
11/24
Savannah Sparrow
**
10/5
10/20
11/10
11/27
After Nov 30
Common Gallinule
*
10/18
10/28
11/11
11/19
After Nov 30
Common Gallinule
*
10/18
10/28
11/11
11/19
After Nov 30
Hermit Thrush
*
10/15
10/25
11/11
11/17
11/21
American Bittern
*
9/14
10/9
11/12
After Nov 30
-
Dunlin
**
10/10
10/26
11/12
After Nov 30
-
American Kestrel
**
9/12
9/29
11/12
After Nov 30
-
Western Meadowlark
*
10/2
10/19
11/12
After Nov 30
-
Wilson's Snipe
*
9/30
10/15
11/14
After Nov 30
-
Field Sparrow
*
10/14
10/25
11/14
After Nov 30
-
American White Pelican
*
9/29
10/30
11/15
11/21
After Nov 30
Golden-crowned Kinglet
**
10/7
10/17
11/15
After Nov 30
-
Great Blue Heron
***
8/2
11/5
11/16
After Nov 30
-
Northern Harrier
**
9/16
10/27
11/16
After Nov 30
-
Ruby-crowned Kinglet
*
9/26
10/14
11/16
11/24
After Nov 30
Song Sparrow
*
10/7
10/19
11/17
After Nov 30
-
American Wigeon
*
10/10
10/30
11/18
After Nov 30
-
Northern Pintail
*
10/18
10/31
11/18
After Nov 30
-
Green-winged Teal
**
10/11
11/4
11/18
After Nov 30
-
Black Vulture
*
8/28
9/30
11/18
After Nov 30
-
White-throated Sparrow
**
10/9
10/19
11/18
After Nov 30
-
Ending Departures
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Sandwich Tern
*
-
8/2
8/16
8/27
After Nov 30
Barn Swallow
***
-
8/2
8/10
9/9
11/14
Least Sandpiper
*
-
8/2
8/25
9/15
After Nov 30
Western Sandpiper
*
8/2
8/17
8/31
9/15
After Nov 30
Cave Swallow
*
8/2
8/28
9/4
9/16
11/21
Nashville Warbler
***
8/30
9/11
10/4
10/24
11/12
Northern Mockingbird
***
9/7
9/23
10/10
10/26
11/22
Eastern Towhee
***
9/10
10/10
10/19
11/1
11/12
Merlin
*
9/8
9/18
10/9
11/2
11/16
Northern Rough-winged Swallow
**
9/25
10/3
10/13
11/2
11/20
Scissor-tailed Flycatcher
***
9/8
9/23
10/7
11/3
11/23
Blue-headed Vireo
*
9/3
10/15
10/31
11/8
11/14
House Wren
***
9/23
10/6
10/28
11/12
After Nov 30
Lincoln's Sparrow
**
9/23
10/4
10/31
11/13
11/21
Tree Swallow
**
9/24
10/3
11/2
11/14
11/22
Sharp-shinned Hawk
**
9/8
9/24
10/28
11/15
After Nov 30
Vesper Sparrow
*
10/12
10/23
11/7
11/15
11/22
Sora
*
8/29
9/21
11/7
11/17
After Nov 30
Hermit Thrush
*
10/15
10/25
11/11
11/17
11/21
Marsh Wren
*
9/20
10/3
11/1
11/18
After Nov 30
Orange-crowned Warbler
**
10/17
10/28
11/10
11/18
11/24
Great Plains
Moderate to locally heavy flights occur over the central and southern Plains to kick off the weekend. But southerly flow builds rapidly through the remainder of the weekend in these areas to quiet activity significantly. As this flow moves into these areas, more northern locales experience their own pulse of moderate flights on Sunday and Monday nights. Following these movements the region is mostly quiet until late in the period, when a more substantial disturbance arrives. Behind this moderately strong system moderate to locally heavy flights are likely.
Mallard. William Keim/Macaulay Library. eBird S32458341.
Species on the Move
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Common Goldeneye
****!
11/5
11/15
After Nov 30
-
-
Common Merganser
***
11/5
11/19
After Nov 30
-
-
Peaking Arrivals
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Yellow-bellied Sapsucker
*
9/12
9/27
After Nov 30
-
-
Brown Creeper
**
9/18
10/5
After Nov 30
-
-
Dark-eyed Junco
****!
9/29
10/14
11/20
After Nov 30
-
Herring Gull
**
9/30
10/24
After Nov 30
-
-
Common Loon
***
10/16
10/27
11/11
After Nov 30
-
Purple Finch
*
8/2
10/27
After Nov 30
-
-
Bonaparte's Gull
***
10/16
10/28
11/12
After Nov 30
-
Rough-legged Hawk
**
10/12
10/29
After Nov 30
-
-
Lesser Scaup
***
10/21
10/30
11/12
After Nov 30
-
Mallard
***
10/14
10/31
11/17
After Nov 30
-
Snow Goose
***
10/23
11/3
11/19
After Nov 30
-
Hooded Merganser
***
10/23
11/3
11/17
After Nov 30
-
Ross's Goose
**
10/25
11/5
11/22
After Nov 30
-
Greater Scaup
**
10/26
11/5
11/16
After Nov 30
-
Bufflehead
***
10/29
11/7
11/18
After Nov 30
-
Cackling Goose
***
11/1
11/10
11/23
After Nov 30
-
Canada Goose
***
11/1
11/10
11/22
After Nov 30
-
Bald Eagle
***
10/17
11/10
After Nov 30
-
-
Common Goldeneye
****!
11/5
11/15
After Nov 30
-
-
Beginning Departures
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
-
American Avocet
***
9/23
10/5
10/20
11/12
After Nov 30
Red-winged Blackbird
***
9/12
9/26
10/22
After Nov 30
-
Double-crested Cormorant
***
9/10
9/26
10/23
After Nov 30
-
American Pipit
***
9/17
10/6
10/24
11/12
After Nov 30
Greater Yellowlegs
**
-
8/2
10/27
11/16
After Nov 30
Northern Harrier
***
9/12
10/11
10/28
11/12
After Nov 30
Pied-billed Grebe
***
9/3
9/16
10/30
11/13
11/29
Western Grebe
**
9/6
10/17
10/31
After Nov 30
-
Sandhill Crane
***
10/7
10/18
10/31
11/13
After Nov 30
Pine Siskin
*
9/26
10/9
11/2
After Nov 30
-
American Wigeon
***
10/4
10/20
11/4
11/20
After Nov 30
Greater White-fronted Goose
***
10/5
10/18
11/5
11/24
After Nov 30
Green-winged Teal
***
10/5
10/20
11/5
After Nov 30
-
Ring-necked Duck
***
10/16
10/25
11/5
11/14
11/19
Golden-crowned Kinglet
*
9/25
10/12
11/5
11/15
After Nov 30
Northern Pintail
***
10/10
10/23
11/6
After Nov 30
-
Ruddy Duck
***
10/13
10/24
11/6
11/21
After Nov 30
Horned Grebe
***
10/8
10/21
11/6
11/22
After Nov 30
Gadwall
***
10/9
10/20
11/7
After Nov 30
-
Northern Shoveler
***
10/19
10/27
11/7
11/19
After Nov 30
Redhead
***
10/17
10/26
11/8
11/20
After Nov 30
Canvasback
***
10/19
10/28
11/10
After Nov 30
-
Ring-billed Gull
***
10/11
10/23
11/10
After Nov 30
-
Common Loon
**
10/16
10/27
11/11
After Nov 30
-
Lesser Scaup
***
10/21
10/30
11/12
After Nov 30
-
Bonaparte's Gull
***
10/16
10/28
11/12
After Nov 30
-
Greater Scaup
**
10/26
11/5
11/16
After Nov 30
-
Mallard
***
10/14
10/31
11/17
After Nov 30
-
Hooded Merganser
***
10/23
11/3
11/17
After Nov 30
-
Bufflehead
***
10/29
11/7
11/18
After Nov 30
-
Ending Departures
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Black-bellied Plover
*
-
8/2
8/21
9/1
11/21
Osprey
***
8/28
9/9
9/23
10/6
11/11
American Golden-Plover
*
8/12
9/22
9/30
10/12
11/16
Great Egret
***
-
8/2
9/13
10/20
11/11
Yellow-rumped Warbler
***
9/15
9/26
10/11
10/24
11/15
Wood Duck
**
-
8/2
8/20
10/28
After Nov 30
Sharp-shinned Hawk
*
8/31
10/2
10/17
10/28
After Nov 30
Red-shouldered Hawk
*
8/2
9/7
9/29
10/28
11/25
Common Grackle
***
9/13
9/20
10/6
10/29
After Nov 30
Chipping Sparrow
***
9/20
9/24
10/1
11/1
11/13
Swamp Sparrow
***
9/21
10/2
10/16
11/2
11/14
Wilson's Snipe
**
8/2
10/3
10/18
11/3
11/16
Killdeer
***
-
-
Before Aug 1
11/4
After Nov 30
Northern Flicker
***
9/7
9/16
10/1
11/4
11/13
Field Sparrow
***
9/20
10/4
10/18
11/4
11/15
Song Sparrow
***
9/26
10/8
10/24
11/6
11/17
White-throated Sparrow
***
9/16
9/28
10/15
11/6
11/17
Franklin's Gull
***
9/3
9/16
10/16
11/7
After Nov 30
Eastern Meadowlark
***
9/21
10/1
10/17
11/7
11/19
Merlin
*
8/19
9/6
10/24
11/8
11/24
Red-tailed Hawk
**
9/5
9/27
10/27
11/9
After Nov 30
Northern Harrier
***
9/12
10/11
10/28
11/12
After Nov 30
American Avocet
***
9/23
10/5
10/20
11/12
After Nov 30
American Pipit
***
9/17
10/6
10/24
11/12
After Nov 30
Pied-billed Grebe
***
9/3
9/16
10/30
11/13
11/29
Sandhill Crane
***
10/7
10/18
10/31
11/13
After Nov 30
Ring-necked Duck
***
10/16
10/25
11/5
11/14
11/19
Golden-crowned Kinglet
*
9/25
10/12
11/5
11/15
After Nov 30
Greater Yellowlegs
***
-
8/2
10/27
11/16
After Nov 30
West
Scattered light movements may be the highlight of the weekend’s migration, as conditions are mostly unfavorable across the region for much beyond these intensities. However, Sunday and Monday see potential for these flights to intensify slightly in the eastern Rockies and in the Desert Southwest. Unfavorable conditions persist, though, and most areas of the region stay quiet until Thursday. A passing disturbance begins to intensify by this point, bringing favorable conditions to more of the region for light to locally moderate flights.
Northern Pintail. Donna Pomeroy/Macaulay Library. eBird S32344391.
Species on the Move
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Rough-legged Hawk
*
10/12
11/29
After Nov 30
-
-
Common Goldeneye
***
11/4
11/12
After Nov 30
-
-
Peaking Arrivals
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
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 Phoebe
**
8/16
9/9
11/17
After Nov 30
-
Red-tailed Hawk
***
8/7
9/10
After Nov 30
-
-
American Pipit
**
8/31
9/11
11/15
After Nov 30
-
Say's Phoebe
**
9/1
9/13
11/21
After Nov 30
-
Eared Grebe
***
9/2
9/16
11/11
After Nov 30
-
Varied Thrush
**
9/18
9/29
After Nov 30
-
-
Cackling Goose
**
9/16
10/3
After Nov 30
-
-
Herring Gull
**
9/28
10/13
After Nov 30
-
-
Redhead
*
10/3
10/14
11/14
After Nov 30
-
Ruddy Duck
**
9/21
10/14
11/18
After Nov 30
-
American Wigeon
***
9/2
10/17
11/22
After Nov 30
-
Ring-necked Duck
***
9/21
10/17
11/20
After Nov 30
-
Pied-billed Grebe
**
8/2
10/19
11/11
After Nov 30
-
Bald Eagle
**
9/26
10/19
After Nov 30
-
-
Greater Scaup
*
10/8
10/20
After Nov 30
-
-
Mew Gull
**
10/1
10/22
11/20
After Nov 30
-
Glaucous-winged Gull
**
10/10
10/23
After Nov 30
-
-
Gadwall
**
10/7
10/25
11/17
After Nov 30
-
Lesser Scaup
***
10/8
10/26
11/19
After Nov 30
-
Bufflehead
***
10/16
10/29
After Nov 30
-
-
Pacific Loon
*
10/14
10/29
11/24
After Nov 30
-
Hooded Merganser
**
10/19
11/2
After Nov 30
-
-
Red-breasted Merganser
**
10/20
11/2
11/20
After Nov 30
-
Canada Goose
**
8/2
11/4
After Nov 30
-
-
Trumpeter Swan
*
10/21
11/4
After Nov 30
-
-
Canvasback
**
10/9
11/4
11/19
After Nov 30
-
Tundra Swan
**
10/25
11/6
11/19
After Nov 30
-
Ferruginous Hawk
*
10/25
11/6
After Nov 30
-
-
Ring-billed Gull
**
8/10
11/7
11/22
After Nov 30
-
Barrow's Goldeneye
*
10/25
11/8
After Nov 30
-
-
Northern Harrier
**
8/17
11/8
11/20
After Nov 30
-
Ross's Goose
*
10/30
11/9
11/22
After Nov 30
-
Sandhill Crane
*
9/14
11/10
11/18
After Nov 30
-
Common Goldeneye
***
11/4
11/12
After Nov 30
-
-
Beginning Departures
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Greater Yellowlegs
*
8/11
8/18
8/28
After Nov 30
-
Elegant Tern
*
8/2
8/21
9/7
After Nov 30
-
Black-bellied Plover
*
9/12
9/18
9/30
After Nov 30
-
Red-shouldered Hawk
*
8/17
9/12
10/3
After Nov 30
-
Western Meadowlark
*
9/16
9/30
10/16
After Nov 30
-
Sharp-shinned Hawk
*
8/23
9/10
10/19
11/11
After Nov 30
Belted Kingfisher
*
-
8/2
10/22
After Nov 30
-
Marsh Wren
*
8/21
9/20
10/29
After Nov 30
-
Dunlin
*
10/5
10/15
10/30
After Nov 30
-
Western Grebe
***
10/3
10/14
11/2
After Nov 30
-
Red-necked Grebe
*
8/26
10/20
11/3
11/13
11/20
Common Loon
**
10/12
10/23
11/4
11/14
11/22
White-winged Scoter
*
10/11
10/20
11/5
11/15
After Nov 30
Clark's Grebe
*
10/8
10/18
11/6
After Nov 30
-
California Gull
*
8/2
10/22
11/7
After Nov 30
-
Horned Grebe
*
9/20
10/21
11/8
11/15
11/19
Dark-eyed Junco
*
9/23
10/5
11/8
11/13
11/16
Merlin
*
8/30
9/14
11/9
11/28
After Nov 30
Surf Scoter
*
10/7
10/21
11/10
11/15
11/18
Bonaparte's Gull
***
10/17
10/28
11/10
After Nov 30
-
Pied-billed Grebe
**
8/2
10/19
11/11
After Nov 30
-
Eared Grebe
***
9/2
9/16
11/11
After Nov 30
-
Redhead
*
10/3
10/14
11/14
After Nov 30
-
American Pipit
*
8/31
9/11
11/15
After Nov 30
-
Gadwall
*
10/7
10/25
11/17
After Nov 30
-
Green-winged Teal
*
8/2
8/20
11/17
After Nov 30
-
Black Phoebe
*
8/16
9/9
11/17
After Nov 30
-
Ruddy Duck
*
9/21
10/14
11/18
After Nov 30
-
Sandhill Crane
**
9/14
11/10
11/18
After Nov 30
-
Ending Departures
Species
Noticeability
Migrants Begin Arriving
Rapid Migrant Influx
Peak
Rapid Migrant Departure
Last Migrants Depart
Sora
*
8/21
9/1
9/13
9/23
After Nov 30
Marbled Godwit
*
8/9
8/17
8/28
9/29
After Nov 30
American Avocet
*
8/15
8/21
8/30
9/30
After Nov 30
Black Turnstone
*
8/6
8/17
9/21
10/2
After Nov 30
Heermann's Gull
*
8/15
9/14
9/21
10/2
After Nov 30
American Robin
*
8/30
9/4
10/10
10/17
11/14
Brewer's Blackbird
*
8/23
9/11
9/27
10/20
After Nov 30
Cooper's Hawk
**
8/2
9/7
10/1
10/24
11/11
Golden-crowned Sparrow
*
9/13
9/26
10/19
10/26
11/18
Red-winged Blackbird
**
8/25
9/12
10/10
10/27
After Nov 30
Golden-crowned Kinglet
*
9/10
10/4
10/23
11/6
11/18
Hermit Thrush
**
9/25
10/6
10/26
11/6
11/15
Northern Flicker
***
9/5
9/29
10/16
11/8
11/22
Ruby-crowned Kinglet
*
9/21
10/3
11/5
11/10
11/12
Sharp-shinned Hawk
*
8/23
9/10
10/19
11/11
After Nov 30
Red-necked Grebe
*
8/26
10/20
11/3
11/13
11/20
Dark-eyed Junco
*
9/23
10/5
11/8
11/13
11/16
Common Loon
**
10/12
10/23
11/4
11/14
11/22
Surf Scoter
*
10/7
10/21
11/10
11/15
11/18
White-winged Scoter
*
10/11
10/20
11/5
11/15
After Nov 30
Horned Grebe
*
9/20
10/21
11/8
11/15
11/19
–––––––––––––––––––––––––––––––––––
Farnsworth and Van Doren
