Penguin

Penguins cannot fly but they swim and dive very well. They spend in water a lot of time and can remain in water for months without landing. On land, penguins only lay eggs and raise fledglings. Emperor penguins do not make nests. A mother lays one egg onto her feet and covers it with a crease of its belly. A little later, she passes the egg to the father. When the fledgling hatches, one of the parents goes to the sea in search of food, the other remaining to heat the fledgling with its warmth.

The penguin couples are very firm. Penguins live in large families. Each bird in a family knows well the exact location of its nest and easily recognizes its fledglings and the neighbors by voice.