When, where, and how far will birds migrate? How many birds passed last night? Our tools help you explore the answers to these and many other questions about bird migration.
Explore nightly migration data in your region. Learn more
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.
Search with our local migration alert tool to determine whether birds are passing overhead near your city tonight!
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.
The past week saw another movement above the half a billion mark, with continued high intensity flights predicted for 16-17 October. Let's get those lights out, especially in the areas with red alerts. Read more
In recent days we've hit the highest highs and lowest lows of this migration season. Here, we speak briefly about the last week's events and highlight the upcoming movements and action alerts for the next three days. Read more
Migration intensity goes off the charts - the BILLION bird barrier is shattered! Read more
NASA Earth Observatory images by Joshua Stevens, using Suomi NPP VIIRS data from Miguel Román, NASA's Goddard Space Flight Center
BirdCast is a consortium of interdisciplinary researchers, primarily from three organizations at present, with a growing list of collaborators, supporters, and partners. Learn more