Flocks of birds are crossing the skies. Which means it's time for the fall migration bird show. Naturalist and bird enthusiast Bridget Butler joins us to explore mysterious bird calls and bird behavior, explain how birds know when to migrate and the science behind the tell-tale V of Canada geese in migration.

Post your migratory bird questions or comments for Bird Diva Bridget Butler here or email them to vermontedition@vpr.net.