Before scientists can understand how gorilla society works, they must be able to identify individual members of the group. You identify people by their hair color, eyes, nose and body build. Well, scientists look at individual gorillas the same way. A gorilla's nose is its most unique feature, so scientists identify individual gorillas by the shape of their nose and nostrils. They use gorilla noses in the same way that human fingerprints are used for identification.

On the right are six gorillas who live in the Congo Gorilla Forest at the Bronx Zoo. Click each gorilla's picture to learn more, and see if you can find differences in eyes, hair color and, of course, noses.