+Birds are warm-blooded [vertebrates](/wiki/vertebrate) characterized by [feathers](/wiki/feathers), a beak, and the laying of hard-shelled eggs. Most species possess wings, enabling them to achieve [flight](/wiki/flight) and traverse vast distances. Their diverse songs and vivid plumage bring life to ecosystems worldwide.
+## See also
+- [Egg](/wiki/egg)
+- [Migration](/wiki/migration)
+- [Nest](/wiki/nest)
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