News: Resources

Resources
By Victoria Simons Colorado State University Sep 16, 2022

Aeroecological research is more than simply studies of bird migration. Victoria Simons is studying how Tree Swallow foraging behavior relates to their usage of airspace as habitat.   Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 19, 2022

The new BirdCast Migration Dashboard is here, providing nocturnal bird migration data for counties and states in the contiguous US! This tool offers new capabilities to investigate birds' movements in detail and at scales that complement our existing national forecast and live migration maps. Try it out today to explore patterns of nocturnal bird migration in your area!  Read more...

Migration
By Benjamin Van Doren The Cornell Lab Jun 07, 2021

The BirdCast team led a study published today that uses two decades of data to show that migration magnitude, light output, and wind conditions are important predictors of collisions at a high-profile building in Chicago. This research has global implications for conservation action campaigns aimed at eliminating an important cause of bird mortality: light pollution and resulting collisions with structures.  Read more...

Migration
By Andrew Farnsworth and Adriaan Dokter The Cornell Lab Jun 01, 2021

The spring of 2021 offered many migration highlights, and here we showcase the top 5 mega-flights of this soon-to-be-in-the-books season.  Read more...

Migration
By Adriaan Dokter The Cornell Lab May 22, 2021

During the past week, enormous numbers of birds have been migrating through the US. But birders seeking massive concentrations of birds in their favorite habitats may not have experienced the fallouts of their dreams. A new visualization depicting the altitude of migration, when viewed in conjunction with the distribution of migration traffic, highlights an explanation.  Read more...

Migration
By Andrew Farnsworth The Cornell Lab May 06, 2021

Southern California affords some excellent opportunities to see continuing diurnal migration of typically nocturnal migrants. Kicking off in Spring 2021, the Bear Divide Migration Count by the Moore Lab of Zoology at Occidental College is one of these opportunities!  Read more...

Migration
By Kyle Horton Colorado State University May 06, 2021

For more than 50 years US radar aeroecology has largely been restricted to the lower 48 states — until now. Just out in the Proceedings of the Royal Society B, the BirdCast team publishes the first weather surveillance radar studies of Alaskan bird migration.  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...

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 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 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...

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...

Migration
By Adriaan Dokter The Cornell Lab Apr 20, 2020

As of 20 April 2020 the BirdCast live migration maps switched color palettes to match migration forecast maps. The new color palette is more suitable for viewers with green-, red-, or blue-color blindness, and is perceptually uniform in color and black-and-white (see this interesting talk by the designers of this so-called "viridis" color scale).  Read more...

Migration
By Andrew Farnsworth The Cornell Lab Apr 14, 2020

We updated the color scheme of migration forecast maps on 13 April 2020 to add more contrast to the palette that makes visually impaired viewing easier.  Read more...

Migration
By Andrew Farnsworth The Cornell Lab Dec 16, 2019

Team BirdCast has been analyzing radar data with our group of talented collaborators, and today we published a new study on shifting patterns of nocturnal bird migration and how dynamic these patterns can be spatially.  Read more...

Migration
By Adriaan Dokter The Cornell Lab Sep 19, 2019

A study published today in the journal Science reveals that the volume of spring migration, as measured by the NEXRAD radar network in the night skies, has dropped by 14 percent in the past decade. The paper further compiles bird survey data collected on the ground, indicating that bird populations in the United States and Canada have declined by 29 percent since 1970, representing a loss of almost 3 billion birds.   Read more...

Migration
By Andrew Farnsworth The Cornell Lab Aug 28, 2019

Welcome MistNet, a deep convolutional neural network to discriminate precipitation from biology in radar scans! MistNet is a tool that can enable large‐scale, long‐term, and reproducible measurements of whole migration systems, a hallmark of developments by our collaborators at University of Massachusetts and the BirdCast team. Read on to find out more about today's paper published describing this exciting new tool.  Read more...

Migration
By Cecilia Nilsson The Cornell Lab May 15, 2019

Special issue on Radar Aeroecology  As you know, one of the main methods we use to study birds here at BirdCast is radar. Radar has been used to study animal movements for a long time, but recent advances has greatly increased its use and lead to a new wave of research and applications of radar […]  Read more...

Migration
By Cecilia Nilsson The Cornell Lab Apr 02, 2019

ANN ARBOR—Birds that produce faint chirps called flight calls during nighttime migration collide with illuminated buildings much more often than closely related species that don’t produce such calls, according to a new analysis of a 40-year record of thousands of building collisions in the Midwest. The new analysis of more than 70,000 nighttime songbird collisions in […]  Read more...

Migration
By Cecilia Nilsson The Cornell Lab Apr 01, 2019

Chicago, Houston, and Dallas top the list Ithaca, NY—An estimated 600 million birds die from building collisions every year in the United States. Scientists at the Cornell Lab of Ornithology have published new research highlighting artificial light at night as a contributing factor. They’ve ranked metropolitan areas where, due to a combination of light pollution and […]  Read more...

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