The Gray Checkered Whiptail (Cnemidophorus dixoni) is a species of lizard native to the United States in southern New Mexico and western Texas and northern Mexico. It was once considered a subspecies of the Common Checkered Whiptail Cnemidophorus tesselatus but was later granted full species status. It is one of many lizard species known to be parthenogenic. The epithet dixoni is in homage of renowned herpetologist James R. Dixon which leads some sources to refer to it as Dixon's Whiptail. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Animal