Birds have feathers, internal reproduction with hard eggs, lungs with bronchial tubes, are endothermic, and possess wings and beaks without teeth.
Birds are covered in feathers, reproduce internally with hard-shelled eggs, breathe with lungs connected to air sacs, are endothermic, and have wings and beaks but no teeth.
Front | Features of bird: body covering, reproduction, breathing, temp., other features |
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Back | feathers, internal (hard eggs), lungs with bronchial tubes, endothermic, wings and beaks with no teeth |
Tags: 5_6_vertebrate, classes
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