Migration - Bird Species, Patterns, & Adaptations
Why do geese fly in a line slightly behind each other? - Quora
Birds flying in a V take turns in the top spot, study finds - Los Angeles Times
How and Why Did Bird Migration Evolve?
Birds fly in 'V' formation to save energy, study finds (Update)
Do all groups of geese fly in the shape of a V? If not, why do some groups fly in that formation? - Quora
Why do geese fly in formation? - Quora
Why, when you see geese flying, is one side of the “V” formation nearly always longer? - Quora
Why Do Geese Fly In a V Formation When Migrating? - Bird Buddy Blog