Penguins are a flightless bird that can live in the coldest place on Earth—Antarctica. Their diet consists mainly of fish and krill since they hunt in the ocean. They use wings to help them swim fluently—up to 15 miles per hour. There may be as many as 100 species of penguins in the world including emperor, chinstrap, gentoo, adelie, macaroni, and rockhoppers.
These birds are quite adapted to the cold, antarctic. Unlike most birds, penguins can eat snow just as much as water; their stomachs can digest it. Though it doesn't look it, all species of penguins have many, fluffy feather to keep themselves warm. The feathers are very, tightly packed together.
The picture above is of a penguin chick.