When, where, and how far will birds migrate? Our migration forecasts will answer these questions for the first time.
As spring migration winds down, light flights featuring late shorebirds, Eastern Kingbird, Cedar Waxwing, and Grasshopper Sparrow continue in the West early and late in the period primarily in montane areas, while the last vestiges of moderate to locally heavy flights featuring late shorebirds, Yellow-billed Cuckoo, Cedar Waxwing, Sedge Wren, and Henslow's Sparrow grace the East during the second half of the forecast period.
As the peak of migration in most areas recedes with another spring season passing, portions of the West experience light to moderate flights featuring White-throated Swift, Western Wood-Pewee, Warbling Vireo, Swanson's Thrush, Cedar Waxwing, and Gray Catbird primarily mid and late period and patchily distributed moderate to heavy flights featuring Yellow-billed Cuckoo, Eastern Kingbird, Eastern Wood-Pewee, Cedar Waxwing, Orchard Oriole, and Bobolink occur in the East against a backdrop of a dynamic weather scene.
A period of generally favorable migration conditions featuring light to moderate flights of Common Nighthawk, Broad-tailed Hummingbird, Willow Flycatcher, Common Yellowthroat, Grasshopper Sparrow, and Western Tanager is in store for much of the West, particularly in the Rockies, while an unfavorable cool and wet start to the East gives way to later week moderate to heavy flights of White-rumped Sandpiper, Dunlin, Red-necked Phalarope, Black Tern, Black-billed Cuckoo, Red-eyed Vireo, Mourning Warbler, and Scarlet Tanager.
Light to moderate flights graced many areas from California east through the Rockies and featured Black Tern, Willow Flycatcher, Cordilleran Flycatcher, Gray Catbird, and Bobolink, while pulses of moderate and heavy flights featuring White-rumped Sandpiper, Common Nighthawk, Black-billed Cuckoo, Alder Flycatcher, Bay-breasted Warbler, and Canada Warbler were scattered across the East.
IMPORTANT NOTE: Team Birdcast is focusing on preparing for tomorrow’s Global Big Day, and as a result we haven’t been able to write a thorough forecast and analysis by our usual Friday deadline. Here is an abbreviated forecast, with weather maps and species lists; the analysis for the past week and potentially a supplemental forecast […]
Migration conditions will be generally more favorable across southern half of the West this week where moderate flights will feature Wilson's Phalarope, Red-necked Phalarope, Black Tern, Willow Flycatcher, Yellow Warbler, MacGillivray's Warbler, and Green-tailed Towhee, while midweek in the East will see the most extensive moderate to heavy flights of Black-crowned Night-Heron, Semipalmated Plover, Short-billed Dowitcher, Black Skimmer, Common Nighthawk, Black-billed Cuckoo, Acadian Flycatcher, Eastern Wood-Pewee, Canada Warbler, Blackpoll Warbler, and American Redstart in a pulse of significantly warmer air.