Birds

31-2Birds By. Chelsea Monet Murphy

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.

Feathers Feathers are made mostly of protein and develop from pits in the birds skin. ---------->

The Evolution of Birds ,[object Object]

Evidence for this hypothesis is provided by many embryological, anatomical, and physiological characteristics shared by modern birds and living reptiles. ,[object Object],[object Object]

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 <---------

In fact, the title “eats like a bird” it is quite misleading, because most birds are voracious eaters.,[object Object],[object Object]

Air sacs: when a bird inhales, most air enters large posterior air sacs in the body cavity and bones. ,[object Object]

Birds of prey Pelicans and their relatives Parrots Perching birds Cavity-nesting birds Herons and their relatives Ostriches and their relatives

Birds

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Birds