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Animals With Backbones

Birds have light shellsteethfeathersfeetSelect your answer, which can be either dull or brightly colored and which can keep them warm. Birds keep a constant body temperature so they are considered swimmerswarm-bloodedfeatherswingsSelect your answer animals. They have two legs with scaly, clawed shellsfeetteethwingsSelect your answer. Birds have beaks without runteethswimmerswarm-bloodedSelect your answer. While all birds have shellsswimmerswingsrunSelect your answer, some do not use them to fly. Ostriches don’t fly, instead, they swimmersrunwarm-bloodedwingsSelect your answer at speeds of up to 45 miles per hour! Penguins also do not fly but are excellent warm-bloodedswimmersteethfeathersSelect your answer. Birds hatch from eggs with strong warm-bloodedrunswimmersshellsSelect your answer.