Canis lupus familiaris
The domestic dog, is a subspecies of the gray wolf, a member of the Canidae family of the mammalian order Carnivora. The term "domestic dog" is generally used for both domesticated and feral varieties. The dog may have been the first animal to be domesticated, and has been the most widely kept working, hunting, and pet in human history. The word "dog" may also mean the male of a canine species, as opposed to the word "bitch" for the female of the species.