A medium-sized penguin, with a robust, heavyset body. Black on the back and white below, with variable black markings on the breast and belly.
They have small muscles at the base of each feather that enable the feathers to be held tightly against the body whilst in water, forming a waterproof layer. On land the feathers are held erect, trapping an insulating layer of air around the body. They have evolved to keep out the cold, so generally speaking, the smaller the penguin the hotter the climate it comes from.