Birds

Birds are the most visible wildlife in most people's daily lives and among the least examined, which leaves an enormous amount of easy discovery available. This category covers flight and the anatomy that makes it possible, the record holders for size, speed and distance, and the behaviours, migration and mimicry among them, that still puzzle researchers. It also covers their descent from dinosaurs, which is now well established rather than speculative. The explanations link each trait to the demands of flight, which turns out to explain most of what is unusual about them.