Continental Summary Widespread light to moderate movements occurred in both West and East, with some heavy and very heavy movements occurring more locally in space and time in the Plains to end the period. Species on the move this week included  Snow Goose, Yellow-bellied Sapsucker, Gray-cheeked Thrush, Varied Thrush, Gray Catbird,Ruby-crowned Kinglet, Golden-crowned Kinglet, Palm […]  Read more...

Continental Summary Favorable conditions at the end of the forecast period bring widespread light to moderate movements to the West and moderate to heavy movements to the Plains, while increasingly scattered moderate movements occur in the East in more summer-like conditions. Species on the move this week will include Cackling, Snow, and Great White-fronted Geese, American […]  Read more...

Continental Summary Moderate movements in the West that kicked off the weekend continued through the period in some areas, while a major pulse of heavy flights graced the East early in the period. Species on the move this week included Greater White-fronted and Cackling Geese, Northern Pintail, Yellow-bellied Sapsucker, Northern Flicker, Peregrine Falcon, Gray-cheeked, Swainson’s and Hermit […]  Read more...

Continental Summary Favorable conditions bring light to moderate movements for the West’s weekend and moderate to heavy movements for the East’s work week, with unsettled conditions bringing a halt to these movements in most areas to close the forecast period. Species on the move this week will include Greater White-fronted Goose, Northern Harrier, Northern Flicker, Eastern […]  Read more...

Continental Summary Light to moderate movements were the norm across the West, despite precipitation shutting down migrants in some areas, while moderate to locally heavy movements pulsed through the East. Species on the move this week included Greater White-fronted Goose, Dunlin, Northern Flicker, Gray-cheeked Thrush, Swainson’s Thrush, Hermit Thrush, Varied Thrush, Golden-crowned Kinglet, Ruby-crowned Kinglet, Winter Wren, […]  Read more...

Continental Summary Pulses of more provincial movements that begin the weekend contrast the widespread movements that will end the period in the West, while the opposite pattern of movements occurs in the East. Species on the move this week will include American Wigeon, Eared Grebe, Osprey, Sharp-shinned and Broad-winged Hawks, Say’s Phoebe, Swainson’s and Gray-cheeked Thrushes, […]  Read more...

Continental Summary Light to moderate movements were widespread across the West this week, while . Species on the move this week included American Wigeon, Broad-winged Hawk, Black-billed Cuckoo, Pacific-slope Flycatcher, Eastern Wood-Pewee, Red-eyed Vireo, Ruby-crowned Kinglet, American Redstart, Blackpoll, Tennessee, Chestnut-sided and Orange-crowned Warblers, White-crowned and Lincoln’s Sparrows, and Baltimore Oriole. West Light to moderate […]  Read more...

Continental Summary Mid to late week favorable conditions will bring light to moderate movements to many portions of the West, while frontal passages bring an early and late week pulse of moderate to heavy movements through the East. Species on the move this week will include Osprey, Sharp-shinned Hawk, Franklin’s and Ring-billed Gulls, Philadelphia and […]  Read more...

Continental Summary Several nights of moderate movements highlighted migration in the West as did a pulse of moderate to locally heavy movements in the East this week. Species on the move this week included Green-winged and Blue-winged Teal, American Golden-Plover, Buff-breasted Sandpiper, Franklin’s Gull, Common Nighthawk, Orange-crowned, Nashville, Wilson’s, Townsend’s, Black-throated Green, and Blackburnian Warblers, […]  Read more...

Continental Summary An early period patchwork of favorable and unfavorable conditions sees light to moderate movements scattered across the continent, primarily in the West, until a more organized and substantial end of the week frontal passage sees moderate to heavy movements in the northerly flow that follows. Species on the move this week will include Green-winged […]  Read more...

Continental Summary Scattered movements in the West were mostly light to moderate in intensity, in contrast to more widespread moderate and isolated heavy movements in the East. Species on the move this week included Baird’s Sandpiper, Common Nighthawk, Pacific-slope Flycatcher, Great Crested Flycatcher, Swainson’s Thrush, Warbling Vireo, Nashville, Wilson’s, Black-throated Blue, Yellow-throated, and Black-and-white Warblers, and […]  Read more...

Continental Summary Light to moderate movements, primarily in the Pacific Northwest, highlight the period in the West, while the first organized frontal boundary does not bring compelling and more regional scale movements in the East until the end of the week. Species on the move this week Northern Pintail, Green-winged Teal, Blue-winged Teal, Osprey, American […]  Read more...

Continental Summary Scattered light to moderate movements across the West and pulses of moderate movements in the northern Plains and Northeast highlight migration across the continent this past week. Species on the move this week included Green-winged Teal, Blue-winged Teal, Northern Pintail. Northern Shoveler, Greater Yellowlegs, Baird’s Sandpiper, Franklin’s Gull, Eastern Wood-Pewee, Least Flycatcher, Olive-sided […]  Read more...

Continental Summary A patchwork of marginal and locally favorable conditions bring scattered light to moderate movements across the continent this week. Species on the move this week will include Green-winged Teal, Black-bellied Plover, Solitary Sandpiper, Upland Sandpiper, Least Sandpiper, Olive-sided Flycatcher, Yellow-bellied Flycatcher, Wilson’s Warbler, Canada Warbler, American Redstart, Black-and-white Warbler, Yellow Warbler, and Bobolink. […]  Read more...

Continental Summary Locally light to moderate movements in the West over the weekend and a pulse of more widespread light to moderate movements from the Great Plains through the Southeast to begin the work week were the primary migration highlights on radar for the week. Species on the move this week included Northern Shoveler, Green-winged Teal, Blue-winged […]  Read more...

Continental Summary Late week changes in the West bring favorable conditions and extensive light to moderate movements for the Pacific Northwest through the Rockies, while a frontal boundary brings widespread moderate movements through the Great Plains into the east by mid to late week. Species on the move this week will include Blue-winged Teal, Black-bellied […]  Read more...

Although many species in the US and Canada have been on the move for the past month or more, BirdCast begins its seasonal regional migration forecast and analysis series. Please check visit us frequently to see updated weekly posts about species on the move in your area! The animation below shows the past week in […]  Read more...

Although most of the US is firmly in the midst of typical summer conditions, fall migration is already under way for many species. BirdCast will begin its weekly series of forecast and analysis and species on the move in early August, but there are changes a foot now to discuss! And migrants to see, so get […]  Read more...

With a month of the official hurricane season already in the books, Hurricane Arthur arrives on the scene. This Category Two storm is forecast to graze the Outer Banks of North Carolina before shooting off to the Northeast through the Canadian Maritimes toward Greenland. There is a precedent for what we might expect from this storm from an ornithological perspective. […]  Read more...

Continental Summary Species on the move this week included White-rumped Sandpiper, Common Nighthawk, Gray-cheeked Thrush, and Blackpoll and Wilson’s Warblers. West Species on the move this week included Spotted, Semipalmated, and Stilt Sandpipers (AK), Pomarine Jaeger (AK), Common Nighthawk, Alder and Olive-sided Flycatchers (AK), Swainson’s Thrush (AK), Blackpoll (AK), Orange-crowned (AK), Wilson’s Warbler, Western Tanager. […]  Read more...