13. The black and white coloring of penguins works as camouflage.
While penguins might stand out on land, underwater their black and white coloring helps them stay hidden from both predators and prey. As they swim, their black backs blend in with the darker ocean water below them so that they’re difficult to spot from above. Their white chests, meanwhile, help them blend in with the lighter, brighter surface of the water, so that from below, they’re near-invisible. On land, meanwhile, their black backs may stand out sharply against the snowy landscape, but in most regions, the birds face so few predators on land, it’s unnecessary to try to blend into the background.