MYSTERY OF THE MISSING MIGRANTS | © Charley Harper Art Studio | Used with Permission

Bird migration forecasts in real-time

When, where, and how far will birds migrate? Our migration forecasts will answer these questions for the first time.

Learn how


Migration tools


Bird migration forecast maps show predicted nocturnal migration 3 hours after local sunset and are updated every 6 hours. Colorado State University and the Cornell Lab of Ornithology currently produce these forecasts.  Learn more

Forecast map: Day 1
Forecast map: Day 2
Forecast map: Day 3
Forecast map: Day 1
Forecast map: Day 2
Forecast map: Day 3

Search with our local migration alert tool to determine whether birds are passing overhead near your city tonight!  Learn more

See real-time analysis maps of intensities of actual nocturnal bird migration, as detected by the US weather surveillance radar network between local sunset to sunrise. Cornell Lab of Ornithology currently produces these maps.

Play live bird migration maps

Recent news

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

All news

NASA Earth Observatory images by Joshua Stevens, using Suomi NPP VIIRS data from Miguel Román, NASA's Goddard Space Flight Center

Lights Out

Every spring and fall, billions of birds migrate through the US, mostly under the cover of darkness. This mass movement of birds must contend with a dramatically increasing but still largely unrecognized threat: light pollution.

BirdCast Partners and Support

BirdCast is a consortium of interdisciplinary researchers, primarily from three organizations at present, with a growing list of collaborators, supporters, and partners. Learn more

Core partners
Core funders
Other support
Other partners