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.

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.

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.

BirdCast provides live and local bird migration alerts throughout the continental US by employing real-time analysis of bird migration traffic as detected by radar. You can use this tool to determine …

Apr 19, 2022 · Explore nightly migration data in your region. The new BirdCast Migration Dashboard provides summaries of radar-based measurements of nocturnal bird migration, including estimates of …

Orange arrows show directions to which birds flew. Green dots represent radar locations for which data are available; red dots represent radar locations with no data available.

Fall migration is upon us! Well, it has been for some weeks, but on 1 August, BirdCast begins its nightly migration forecasting! We are often asked, when is peak bird migration in my area? Good question! …

Learn the peak migration dates for your city in the contiguous U.S. here!

Building owners, businesses, developers, and homeowners can help protect migrating birds by turning off all non-essential nighttime lighting on buildings and other structures from 11:00 p.m. to 6:00 a.m. …

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 …