Birds are a group of warm-blooded vertebrates constituting the class Aves characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, ...
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Feathers are not the only thing that defines an animal as a bird, they also have wings, lay eggs, build nests and have specialized beaks and feet. FEATHERS!
Bird ID Wizard—Step-by-step. Answer three simple questions about a bird you are trying to identify and Merlin will give you a list of possible matches.
Explore more than 800 North American bird species, learn about their lives and habitats, and how climate change is impacting their ability to survive.