Bonaparte’s Gull. Eric Gofreed/Macaulay Library. eBird S40292072.
Continental Summary
Primarily unfavorable migration conditions in the West, coupled with the late date in the fall migration season, will allow for only local light movements featuring Northern Pintail, Green-winged Teal, Redhead, Pied-billed Grebe, Eared Grebe, Sandhill Crane, Say’s Phoebe, Varied Thrush, and American Pipit, while several pulses of energy moving through the East will bring favorable migration conditions that feature moderate to locally heavy movements of Gadwall, Lesser Scaup, Bufflehead, Tundra Swan, Common Loon, American Bittern, Bonaparte’s Gull, American Kestrel, and Hermit Thrush.
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
Local moderate and scattered heavy flights will occur in the region over the weekend, as a significantly cooler mass of air passes and brings favorable winds for many remaining migrants to move. Note, however, the distribution of these favorable winds is not widespread across the region, making conditions quite variable. Monday and Tuesday see the influence of high pressure off the Atlantic bring favorable conditions for moderate coastal flights to continue. But the last days of the period see significant strong systems move through and into the region, spawning more widespread flights in the last combination of favorable migration conditions and birds present to take advantage of them; these systems also bring the potential of an influx of new western strays to the region’s coasts.
Tundra Swan. Robert Bochenek/Macaulay Library. eBird S40384004.
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
Moderate and locally heavy movements will be scattered across more easterly portions of the region during the first half of the period, as favorable and marginal migration conditions associated with a significant low pressure system offshore spawn primarily coastal flights. Although these conditions persist into the beginning of the second half of the period, a looming strong frontal passage at the end of the week is forecast to be proceeded by less favorable southerly flow. This will translate into decreasing intensities and extents of flights from Tuesday through the end of the period. Note, however, that the passage of the approaching system through Texas will spawn a new round of moderate flights on Thursday night, particularly in northern Texas.
Hermit Thrush. Lila Theis/Macaulay Library. eBird S40291191.
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
A late weekend pulse of scattered moderate flights highlights the excitement for the first half of the period. But by Tuesday night, a frontal boundary crosses the Plains and spawns a round of moderate to locally heavy flights mostly in the northern and central Plains. After a day of unfavorable conditions in the immediate wake of this passage, another significantly stronger storm passes on Thursday night, ushering in more widespread nocturnal and diurnal movements on Thursday night and Friday, respectively.
Common Loon. David Mootz/Macaulay Library. eBird S40323890.
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
Mostly unfavorable conditions for migration are in place for the first half of the period, when isolated light movements may occur. By Tuesday night, the northern and central Rockies see some favorable conditions for moderate flights to occur. But aside from these favorable conditions, and a forecast for another round of more widespread favorable conditions in the Rockies and Desert Southwest to end the period, most of the region does not experience much movement. Note, the favorable conditions on Thursday night will see locally moderate flights from southern California east through the Continental Divide and then north along the eastern front of the Rockies.
Eared Grebe. Joan Tisdale/Macaulay Library. eBird S40343604.
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
