When, where, and how far will birds migrate? Our migration forecasts will answer these questions for the first time.
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.
Local light and moderate flights were the norm in the West featuring Common and Barrow's Goldeneyes, Trumpeter Swan, Bonaparte's Gull, Snowy Owl, American Kestrel, and Horned Lark, while moderate and heavy flights occurred in numerous areas of the East featuring Canvasback, Common Goldeneye, Hooded, Red-breasted and Common Mergansers, Tundra Swan, Bonaparte's Gull, Snow Bunting, and American Tree Sparrow.
Marginal and favorable migration conditions for light to moderate flights are scattered across the West for the middle of the period and will feature White-winged Scoter, Common Loon, Clark's Grebe, California Gull, Merlin, American Pipit, and Ruby-crowned Kinglet, while a major pulse of moderate to heavy flights in favorable migration conditions for the East will feature Greater White-fronted Goose, American Wigeon, Northern Pintail, Surf Scoter, White-winged Scoter, Vesper Sparrow, Fox Sparrow, Dark-eyed Junco, and Red-winged Blackbird.
Light and locally moderate movements featuring Common Goldeneye, Hooded Merganser, Tundra Swan, Bonaparte's Gull, Say's Phoebe, American Pipit, and Rusty Blackbird, were the norm in some parts of the West, while pulses of locally moderate to heavy flights came to the East and featured Bufflehead, Hooded Merganser, Ross's Goose, Common Loon, Rough-legged Hawk, Herring Gull, Hermit Thrush, Snow Bunting, and Dark-eyed Junco.
A strong low pressure center moving up the Atlantic Coast late during the week of 23 October 2017 produced favorable conditions to transport Neotropical migrants on the move, presumably from the southeastern US, far to the north of their intended destinations.
Favorable migration conditions with light to moderate movements featuring Common Goldeneye, Hooded Merganser, Ross's Goose, Canada Goose, Pacific Loon, Western Grebe, Red-necked Grebe, Dunlin, and Ring-billed Gull come early in the period to some areas of the West, several pulses of favorable migration conditions bring moderate to very heavy movements to the East that will feature American Wigeon, Pied-billed Grebe, Sharp-shinned Hawk, Northern Harrier, Sandhill Crane, Eastern Phoebe, House Wren, and Pine Siskin.