Oklahoma State University
Oklahoma State University: Breeds of Livestock Horses
For a very good primer on horses, visit this site. It contains an alphabetized listing of different types of horses, and the pages include the history of various breeds and their physical features.
American Museum of Natural History
American Museum of Natural History: O Logy: Beautiful Breeds: Friesian
Description and detailed illustrations of the Friesian, a Dutch horse popular for its performance abilities. Choose Friesian from the list on the right.