: They possess thick blubber and waterproof feathers coated in oil from a preen gland to stay dry and warm.
: Both parents usually take turns guarding the nest and foraging for fish, krill, or squid.
: Most species are monogamous during the breeding season. Some, like the Fjordland crested penguin , form lifelong bonds.
: Instead of wings for flight, penguins have stiff, scale-like flippers used for "flying" underwater.
: Chinstrap penguins have been found to nod off over 10,000 times a day for just seconds at a time to stay vigilant. Social & Breeding Life