Penguins are carnivorous birds that live exclusively in the Southern Hemisphere south of the equator. They hunt for fish and squid in the water using their sharp vision, catching prey with their beaks. Different penguin species specialize in different types of prey depending on their habitat. The largest penguin is the emperor penguin, which can grow up to 4 feet tall and weigh over 90 pounds. Penguins have adaptations like feather layers and fat deposits that allow them to regulate their body temperature in cold climates.