Apedia

Features Bird Body Covering Reproduction Breathing Temp Features 

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 
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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