Bird Behavior Bird Species Bird Anatomy Eagle Species Chickens Barn Owl Studies Seabirds Hummingbirds Falconry Behavioral Ecology Animal Health Monogamous Birds Behavioral Studies Ravens Parrots Pigeon Studies Vulture Species Pigeon Species Zebra Finches
Parallel independent evolution on Shetland with similar change on St Kilda suggests those island populations may be on a path to separate species.