Contour Feather  - helps the balance and steer during flight, Adaptation - a specific part of the bird that helps it survive, Characteristic - something ALL birds share and never change, Air Sac - helps make sure the birds have enough oxygen, Vertebrate - animal with a backbone, Heart - has four chambers, Ornithologist - scientist who studies birds, Crop  - allows birds to store undigested food, Endothermic - warm blooded animal, Gizzard  - thick, muscular organ that grinds food,

Bird Characteristics and Adaptation Test (Vocab)

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恢復自動保存: ?