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Birds

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Characteristics of Birds
feathers, wings, lightweight bones, adaptions for flight, ectotherms
Feathers
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
complicated
Reproduction
eggs are incubated
internal fertilization
Divided according to
anatomical difference
behaviors
habitats occupied
songs