. What are the physic charestics of birds
and animals that must capture there prey?!
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birds have the following key features: they are endothermic (warm-blooded), have two legs, and lay eggs.
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Defining characteristics of modern birds also include:
Feathers.
High metabolism.
A four-chambered heart.
A beak with no teeth.
A lightweight but strong skeleton.
Production of hard-shelled eggs
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