Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 24, 2021

An evolving frontal boundary will make for some interesting conditions along the Atlantic Seaboard to transport birds farther afield than they might typically travel in the coming 72 hours.  Read more...

Migration
By Andrew Farnsworth The Cornell Lab Apr 19, 2021

The spring window for peak bird migration in Texas has arrived, so it's time to get outside and experience the coming spectacle! Just doing one simple thing will help protect these migrating birds: turn off all non-essential lights between 11pm and 6am every night to go Lights Out and reduce collision risk!  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 16, 2021

Continuing frontal boundaries and associated unstable weather conditions in the Gulf of Mexico are going to make for some interesting migration patterns in the coming week.  Read more...

Resources
By Andrew Farnsworth The Cornell Lab Apr 16, 2021

The GloBAM research consortium published a letter in Science with a call for European national meteorological agencies to provide biological and meteorological data from its radars.  Read more...

Migration
By Andrew Farnsworth The Cornell Lab Apr 15, 2021

In the early morning hours of 9 April 2021, La Soufrière in St Vincent erupted and has continued to do so in dramatic and disastrous fashion in the days since the first explosion. The ash plume from these eruptions now spans a wide swath of the globe from the Caribbean to the western Mediterranean. Birds migrating through this plume may experience hazardous conditions, so observers in areas where concentrations of sulfur dioxide and other volcanic emissions are high should monitor birds' behaviors and physical conditions for potential signs of impacts.  Read more...

Forecast and Analysis
By Adriaan Dokter and Benjamin Van Doren The Cornell Lab Apr 13, 2021

The BirdCast team has unveiled a new feature on our maps! Forecast and live migration maps now indicate the total number of birds in flight above the contiguous United States.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 09, 2021

On Saturday 10 April, a frontal boundary is forecast to move into the Gulf of Mexico region. Beginning midday Saturday, birds may begin concentrating in coastal habitats, particularly in the Upper Texas and southwestern Louisiana coasts; but events may be quite complex, because forecasts suggest that the front will stall.  Read more...

Migration
By Andrew Farnsworth The Cornell Lab Apr 09, 2021

Easterly winds are blowing in the North Atlantic, and they may bring some surprise visitors to northeastern North America.  Read more...

By Andrew Farnsworth The Cornell Lab Mar 17, 2021

With this season's migration underway, the BirdCast team would like to highlight the potential for an unusual migration event associated with predicted weather in the Gulf of Mexico region. The first significant cold front likely to interact over the Gulf of Mexico with incoming trans-Gulf migrants is predicted to pass through the region from 17-20 March. Let’s take a moment to review the current conditions while considering some of the (simplified) mechanics of this fascinating system.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 12, 2021

Winter Storm Xylia is forecast to bring a blast of late winter to the Central Rockies and northern Great Plains this weekend and early next week. Birds will certainly respond to this storm, especially those of more open terrestrial habitats, by seeking more favorable locations free of snow if possible.  Read more...

By Andrew Farnsworth The Cornell Lab Mar 12, 2021

Over the coming weeks, our excitement about arriving migrants in the Gulf of Mexico region from Central and South America and the Caribbean will build to fever-pitch! Some of these migrants will arrive after significant over water flights, which we generally call trans-Gulf migration. We will speak of it often, to be sure! And though the peak of these movements is more than one month from now, even in mid March some inbound trans-Gulf bird migration is occurring over the western Gulf of Mexico.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 03, 2021

Above average temperatures are coming to the eastern half of the US next week, and with these warming temperatures will come early season movements of birds. But for the western US, no such luck arrives. Keep a close eye on forecasts, ours included, to see what happens!  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 01, 2021

As the calendar page turns to March, the BirdCast team opens the spring 2021 migration forecasting season with the return of forecast and live migration maps! Birds are already on the move and have been for many weeks, but number have been increasing, particularly in the southeastern US last night. Read on to check on what species might be on the move in your part of the country.  Read more...

Migration
By Andrew Farnsworth The Cornell Lab Jan 04, 2021

Welcome to 2021! Team BirdCast has a number of projects underway for this year. And although we are still a good 4-6 weeks from the first significant movements of mid to late winter migrants moving in the US, keen observers should be aware of several patterns to watch now.  Read more...

Migration
By Matthew A. Young and Tim Spahr, Finch Research Network Guest Authors Dec 18, 2020

During Fall 2020 a “superflight of finches” occurred in the eastern US, featuring the biggest Evening Grosbeak migration in more than 20 years, redpolls undergoing their largest movement in perhaps a decade, and Pine Siskins irrupting in their best numbers since 2008. These ‘Finch Superflights’, which are defined as southern flights of all eight eastern irruptive finches, are rare, and this year, conditions have aligned and all species have moved in numbers, including the rarest of irruptives, the Pine Grosbeak.  Read more...

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...

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