Yes, penguins lay eggs. They are members of the Spheniscidae family, which is the only group of birds that cannot fly. Penguins lay their eggs in nests, which are usually made of rocks, mud, or grass. The female penguin will lay one or two eggs and the male and female will both take turns incubating them. The eggs will hatch after about 35 days.
Are penguins mammals?
Penguins are not mammals. Mammals are animals that have fur, breathe air, and give birth to live young. Penguins have feathers, breathe air, and lay eggs, so they are not mammals. Penguins are actually birds, but they are flightless birds.