When, where, and how far will birds migrate? Our migration forecasts will answer these questions for the first time.
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.
This weekend's change in temperature will harken the first big flocks of Brant, and numerous other species, arriving in the northeastern US. Read more
BirdCast is deeply disturbed by the mass bird collision events that occurred earlier this week in Manhattan. Light pollution and poor flying conditions on a night of intense migration contributed to these events. There are essentials actions we can take to prevent these types of events: turning off all non-essential lights, especially during migration periods, to reduce birds' attraction to and disorientation by them, and making buildings bird friendly. See our recommendations for turning off lights below. Read more
The BirdCast forecast model predicts just over half a billion birds to be flying during peak flight hours tonight! Turn out your lights! Go birding! 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