Penguin's forelimbs are fin-shaped and suitable for paddling. Feather shaft is short and wide, and the scales with narrow feathers are evenly distributed on the body surface, with short tail and short legs and webbed toes, which is suitable for swimming life. When walking on land, the body is almost upright, swinging from side to side, very gentleman; Penguins are rich in subcutaneous fat, which is beneficial to keep their body temperature in cold areas and water; Bones are heavy and do not swell; The sternum has a well-developed keel process, which is related to the forelimb stroke; Distribution is limited to the southern hemisphere.

I am very happy to give you a short answer, hoping to be adopted. Thank you very much.