Male and female penguins breed, and then the female penguin lays an egg. Most species of penguins generally choose one mate for life.
Penguins do not reach the age of reproduction until they are between the ages of 3 and 8 years old. Their mating season lasts through the spring and summer. The male will create a nesting site and begin looking for a mate. The female penguin chooses which mate she'd prefer. Both penguins take turns keeping the egg or eggs warm until they hatch. The male Emperor penguin is in charge of keeping the egg warm in that species. The eggs can take from 30 to 66 days to hatch.