Birds.

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Presentation transcript:

Birds

Birds Reptile like animals Maintain constant internal body temperature Endotherm- control body temp using metabolism Outer covering of feathers 2 legs covered in scales front limbs modified into wings

Groups of birds Almost 30 different orders, most common Birds of prey ( raptors) Perching birds ( songbirds, sparrows, crows, cardinals) Cavity nesting birds (woodpecker, toucans, etc) Herons and relatives ( storks, herons, cranes, etc) Parrots ( macaws, lovebirds, cockatoos) Pelicans (pelicans, boobies, cormorants) Ostriches ( ostriches, emus, etc)

Flight Highly efficient digestive, respiratory, and circulatory systems Aerodynamic feathers and wings Strong chest muscles

Feeding Beak size/ shape based on feeding material Lack teeth therefore uses crop to store food and gizzard to grind food Esophagus- crop- stomach –gizzard- small intestine-large intestine- cloaca

Respiration unique and highly efficient: one way airflow to ensure oxygen rich air always reaches lungs Air sac to lungs

Circulation 4 chambered heart with double loop system

Excretion Response Excretion Like reptiles, kidneys to uric acid, water removed white pasty solid in cloaca Response Well developed large brain compared to body size

Movement Reproduction Flight: hollow bones Reproduction Internal fertilization Amniotic eggs with hard outer shell

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