By Andrew Farnsworth The Cornell Lab Nov 16, 2020

With dawn’s arrival today Team BirdCast officially closed the books on another migration season of forecasting where, when, and how many birds will migrate over the contiguous US. Team BirdCast thanks all of you who spent time perusing our forecasts, pondering our interpretations, and (hopefully) ground-truthing our speculations!  Read more...

Cyclones
By Benjamin Van Doren The Cornell Lab Nov 11, 2020

Numerous storm-driven birds have likely appeared in peninsular Florida as the meandering Tropical Storm Eta churns in the Gulf of Mexico. With the forecast for the storm to make landfall and move quickly off into the Atlantic Ocean in the coming 24 hours, safe and careful observers may find a range of Gulf of Mexico seabirds and some displaced waterbirds.  Read more...

By Andrew Farnsworth The Cornell Lab Nov 11, 2020

Franklin's Gulls may be on the move far to the east of their normal autumn range in the coming 24-72 hours, as an intense storm system continues to move across the country toward the Atlantic Ocean and entrains and displaces individuals and flocks of this long-distance migrant. Observers in northeastern North America should be on the lookout, especially along coastlines, lakeshores, and rivers, from Wednesday through Friday.   Read more...

By Andrew Farnsworth The Cornell Lab Oct 30, 2020

Spend your spooky Halloween evenings safely enjoying late season bird migration. For the intrepid with no aversion to long nights outside in cold temperatures, direct your optics to the face of the Micro Blue Moon to watch birds pass!  Read more...

Cyclones
By Andrew Farnsworth The Cornell Lab Oct 28, 2020

Hurricane Zeta is powering toward the Louisiana coast, predicted to make landfall on Wednesday afternoon. This storm will certainly entrain Gulf of Mexico seabirds, as well as displacing some nearer shore species inland and dropping overland migrants. Given the storm's arrival time, predicted track and speed, birders from the Louisiana coast to Cape May, NJ should keep safe, socially distanced, and watchful eyes on all bodies of water and your favorite birding patches.  Read more...

By Andrew Farnsworth The Cornell Lab Oct 16, 2020

Central Texas birders, drop what you are doing, distance yourselves from others, and go birding! Radars in the area are currently detecting what may be streaming raptors. Tell us what you find!  Read more...

By Andrew Farnsworth The Cornell Lab Oct 16, 2020

Birders in eastern North America should keep their eyes open, especially in coastal and lakeshore locations, for Cave Swallows this weekend and in the weeks to come. The passage of a strong weather systems, like the cold front moving through the northeastern US today, hearkens the start of a period during which this species can occur, occasionally in significant numbers, far outside of its typical southern ranges.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Oct 16, 2020

Easterly flow in the North Atlantic has the potential to bring European species into northeastern North America in the coming days. Marginal to favorable conditions for such displacement are predicted for the coming days, so birders should watch their favorite patches closely.  Read more...

By Andrew Farnsworth The Cornell Lab Oct 15, 2020

More than 400 million birds will take flight tonight across the contiguous US tonight, highlighted by large flights in the south central US. Tonight will be one of the last very large flights of the autumn, with a diverse array of species on the move.  Read more...

Cyclones
By Andrew Farnsworth The Cornell Lab Oct 09, 2020

Hurricane Delta is a powerful storm predicted to make landfall late on Friday on the Louisiana coast. Gulf of Mexico seabirds, as well as some nearer shore species and overland migrants, will be associated with the arrival and passage of the storm as it moves inland to the north and east.  Read more...

Migration
By Andrew Farnsworth The Cornell Lab Oct 02, 2020

BirdCast is thrilled to announce a public service announcement from former First Lady Laura Bush and a proclamation from Dallas Mayor Eric Johnson about the Lights Out Texas initiative to protect nocturnally migrating birds from the hazards of light pollution!  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Oct 01, 2020

More than half a billion birds will take flight tonight across the contiguous US tonight! The BirdCast model is predicting intense migration in many areas of the central and southeastern US in the wake of a passing cold front.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Sep 28, 2020

The BirdCast model is predicting high intensity migration this evening, with more than half a billion birds on the move! And there will be additional, similarly large flights, in the coming nights! This will likely represent one of the largest series of migration nights of the year in the contiguous US.  Read more...

Migration
By Andrew Farnsworth The Cornell Lab Sep 25, 2020

At this point you have heard the stories for the west about bird mortality, but perhaps you have not heard the stories about species on the move out of the mountains. BirdCast will feature evolving stories about eruptions from higher elevations, and this week we highlight Mountain Chickadee.  Read more...

Migration
By Carley Eschliman and Kyle Horton The Cornell Lab Sep 25, 2020

As a reminder to what the team is working on here at BirdCast, we return to a post we wrote last year. With spring upon us and migration in full swing, here is a primer on what we do. We turn weather radar data into information on the numbers and flight directions of birds aloft in order to expand the understanding of migratory bird movement. After several years (and hundreds of posts) describing migration, species on the move, and unique migration events, we want you to have a better understanding of what happens at BirdCast. Here is a brief overview and a behind-the-scenes look at the ways we apply radar data to study bird migration.  Read more...

Cyclones
By Andrew Farnsworth The Cornell Lab Sep 22, 2020

Hurricane Teddy is arriving soon in Atlantic Canada. A significant diversity of tropical seabirds may arrive with it in Nova Scotia, Newfoundland, and possibly even Greenland.  Read more...

By Andrew Farnsworth The Cornell Lab Sep 21, 2020

Beta is currently a tropical storm, deteriorating to a tropical depression in the next 36-48 hours. Storm birds will be apparent on the Upper Texas coast from Monday through Wednesday, whereas areas further inland into southwestern and central Louisiana may experience some impacts by Thursday.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Sep 20, 2020

Strong northeasterly winds in the western North Atlantic may hearken the arrival of small (very small) numbers of Northern Wheatears in eastern North America. Several have been reported in the last days, will more arrive soon?  Read more...

Migration
By Andrew Farnsworth and Benjamin Van Doren The Cornell Lab Sep 18, 2020

Enormous, and growing, numbers of dead birds discovered in the southern Rockies over the past few weeks have alarmed scientists, conservationists, and advocates alike. The massive mortality events may be a result of intense fires in the western US and the smoke that they have produced.  Read more...

Migration
By Andrew Dreelin, Paul Heveran, Erica Dunn, Andra Florea and Joe Gyekis Guest Authors Sep 16, 2020

Yes, you read the title right— WHITE-breasted Nuthatches! Long overlooked as a humble resident of forests and feeders across North America, the *other* migrating nuthatch is finally getting deserved recognition for its irruptive travels.  Read more...

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