Penguins are cute little birds with legs that are set far down on their bodies. They waddle and hop over rocks. Sometimes they even push themselves along on their stomachs when they are on the snow. They are "countershaded" that is, they are darkly colored on their backs and white on their bellies. They can camouflage themselves very well because of the countershading. As they swim through the water, predators looking up from below are unable to view their white bellies against the light surface of the water, the predators above also have trouble seeing their black backs against the darkness of the deep water.