Here are 10 interesting facts about penguins: Penguins are flightless birds, not mammals. They primarily live in the Southern Hemisphere, with the exception of the Galapagos penguins. Penguins are social birds, often found in large colonies. They are excellent swimmers, having evolved their wings into flippers. Many penguin species are monogamous, forming strong pair bonds. Some penguins, like the emperor penguin, can survive in incredibly cold environments. Penguins have unique methods for stay