Whale Shark
The whale shark is the largest fish in the world, and each one has a unique pattern of white spots that researchers use like a fingerprint.
Endangered
Whooping Crane
In 1941, only about 21 whooping cranes survived; today the only natural wild flock has grown to more than 500 birds.
Wild Water Buffalo
The wild water buffalo has the largest horns of any living bovid, spanning up to about 2 metres.