Dogs. Dogs (689 wallpapers)

A dog is a pet, one of the most popular companion animals. The domestic dog was originally identified as a separate biological species by Linnaeus in 1758, and in 1993 reclassified by the Smithsonian Institution and the American Association of Teriologists as a subspecies of the wolf.

Latin name: Canis lupus familiaris
Pregnancy period: 58 - 68 days
Lifespan: 10 - 13 years
Daily sleep: 12 - 14 hours (large adult)
Height: 15 - 110 cm (shoulders)

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