BirdCast

Showcasing the spectacle of bird migration

When, where, and how far will birds migrate? How many birds passed last night? BirdCast tools help you explore the answers to these and many other questions about bird migration.

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.