Translations:AY Honors/Birds - Advanced/Answer Key/66/en
From Pathfinder Wiki
Bird feet have many specializations. For example, perching birds have a tendon locking mechanism in their feet that helps them hold on to the perch when they are asleep. Aquatic birds have webbed feet used for efficient propulsion through the water. Birds of prey have sharp talons on the ends of their feet which they use for capturing and killing their prey. The male emperor penguin's feet are specially shaped so that he can hold an egg on top of them as he covers it with his body to keep it warm. The ostrich has just two toes on each foot (most birds have four), with the nail of the larger, inner one resembling a hoof. The outer toe lacks a nail. This is an adaptation unique to Ostriches that appears to aid in running.
