A flightless seabird is a type of bird that cannot fly, but instead uses its wings to swim in the water. The most well-known example of this type of bird is the PENGUIN, which has seven letters. Penguins are native to the Southern Hemisphere and live in colonies near the coasts of Antarctica, South America, Australia, and New Zealand. They are well adapted to their cold environment, with feathers that insulate them from the cold and webbed feet that help them to swim.