The domestic dog (Canis lupus familiaris or Canis familiaris)[2] is a member of genus Canis (canines) that forms part of the wolf-like canids,[3] and is the most widely abundant carnivore.[4][5][6] The dog and the extant gray wolf are sister taxa,[7][8][9] with modern wolves not closely related to the wolves that were first domesticated.[8][9] The dog was the first domesticated species[9][10] and has been selectively bred over millennia for various behaviors, sensory capabilities, and physical attributes.[11]