Birds (Class: Aves). Birds apparently evolved from reptiles during the Jurassic. The oldest known bird (Archaeopteryx) resembled reptiles in limb bones and other features. Birds still resemble reptiles: horny beaks, scaly legs, and egg-laying. Digestion of Birds.
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during the Jurassic.
resembled reptiles inlimb bones and other features.
processing in the
and roadrunners have heavy
beaks to kill prey.
owls, falcons, and
hawks use their
talons to catch prey,
but have a sharply
hooked beak to tear off chunks of flesh. In addition, falcons have a tomial tooth (sharp projection from the upper mandible matching a notch in the lower mandible.