Birds are warm blooded vertebrates vertebrates have backbones and are the only animals with feathers although all birds have wings a few species cant fly want to see other animals check out mammals reptiles amphibians fish insects and dinosaurs too. For many animals the ability to move is obvious fish swim birds fly mammals scamper climb run and mosey but for some animals the movement is subtle or restricted to a short period of their life such animals are described as being sessile. Bird facts whether you are watching them at the zoo or out your back window birds are an amazing species that come in endless colors sizes and types they have been around for millions of years and have always made us jealous with their ability to fly. In mammals age related greying happens when the hair roots stop producing pigments it may in part reflect a decline in body condition but can also signal dominance think of a silverback gorilla in fact many birds including jackdaws and robins can go grey too theres even some evidence
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