Bird migration is a seasonal movement of birds between breeding and wintering grounds that occurs twice a year. It is typically from north to south or...

Migrating birds face many perils as they travel between breeding and wintering grounds each year. Migration is a dangerous part of a bird's life cycle...

Reverse migration, also called reverse misorientation, is a phenomenon whereby a bird migrates in the opposite direction to that typical of its species...

major animal groups, including birds, mammals, fish, reptiles, amphibians, insects, and crustaceans. The cause of migration may be local climate, local availability...

Animal migration Bird migration Plant migration, see Seed dispersal, the movement or transport of seeds away from the parent plant Gene migration, a process...

November 2015. "How Bird Migrations Show Up Beautifully on Doppler Radar". Smithsonian.com. Retrieved 9 November 2015. "Following Bird Migration with Doppler"...

Vulture; The Highest Recorded Flying Bird". Boston University. Lincoln, Frederick C. (1999). Migration of Birds. U.S. Fish and Wildlife Service. p. 30...

migratory birds. The bird observatory, which was founded in 1988, rings approximately 20,000 birds a year. During the height of the spring migration in April...

A bird observatory is a centre for the study of bird migration and bird populations. They are usually focused on local birds, but may also include interest...

scientifically accurate bird illustrations. Aristotle in 350 BC in his History of animals noted the habit of bird migration, moulting, egg laying, and...