wild goose

They are warm-blooded vertebrates, their temperature ranges between 38-44 degrees Celsius, their body is covered with feathers, and they are able to fly except for a few such as penguins and ostriches. They are similar to reptiles in many characteristics, such as egg reproduction, embryonic morphology, internal organs structure, presence of pelts and absence of skin glands (except for the caudal gland), similarity of the bones of the cranium and other anatomical characteristics.