Adult penguins only recognize their own baby chicks. Parents can tell the chicks apart based on a unique call that every chick has, according to SeaWorld. The chicks are fed regurgitated food until their feathery down is replaced with waterproof feathers.
Some species of penguins allow older chicks to gather together in crèches for protection from would-be predators. As of 2014, there are 17 species of penguins in the world, according to the Tennessee Aquarium. All of these species live south of the equator.Learn more about Penguins