Penguins live only in the Southern Hemisphere and never in the Northern Hemisphere. The tip of an elephant's trunk is so sensitive and flexible that it can pick up a pin. Orangutans are the only animals besides humans to have fingerprints. The sex of an alligator depends on the temperature the eggs were kept at during incubation. Their diet mainly consists of insects and earthworms.
Prairie dogs live in social groups called towns.
They burrow in the grown creating dozens of dens and tunnels. Once the prairie dogs move on, their 'town' is home to over two hundred other species. In reindeer, unlike other deer, both the male and female have antlers. The antlers of the female are smaller and simpler.