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Characteristics of Birds

feathers, wings, lightweight bones, adaptions for flight, ectotherms


outgrowths of the skin

Functions of Feathers

flight and insulation

Contour Feathers

cover the body

Down Feathers

located beneath contour, trap air for insulation

Preen Gland

secretes oil for waterproofing

Purpose of Respiration in Birds

flight needs large amounts of oxygen

Air System in Birds

One way

Birds heart

4 chambers

Mating Rituals



eggs are incubated
internal fertilization

Divided according to

anatomical difference
habitats occupied

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