2. What is a Bird? Birds are reptile like animals that maintain a constant internal body temperature. They have an outer covering of feathers; two legs that are covered with scales and are used to walking or perching; and front limbs modified into wings.
3. Feathers Feathers are made mostly of protein and develop from pits in the birds skin. ---------->
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6. Endotherms, which include birds , mammals, and some other animals, have high rates of metabolisms compared to ectoderms such As reptiles.How birds are related to reptiles <---------
