Birds have feathers covering the body with a motion of a try of legs and a try of wings. Legs and toes coated with gore skin, beak horn is additionally composed of a substance. Bird feet are equipped with a membrane pool, as adjusting to their habitat. Birds as well as the warm-blooded animals (homoioterm), which means their body temperature constant, unaffected by environmental temperature. Birds breathe with lungs that are equipped with air pocket that's used throughout flight. Closed circulatory system, replica by internal fertilization and lay eggs. Example: chicken, duck, duck, ostrich, kaswari birds, doves, owls, turkeys, and therefore forth.
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