Domestic Dogs: The Gray Wolf

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The gray wolf is the largest extant member of the Canidae, excepting certain large breeds of domestic dog.[31] Gray wolf weight and size can vary greatly worldwide, tending to increase proportionally with latitude as predicted by Bergmann's Rule,[9] with the large wolves of Alaska and Canada sometimes weighing 3–6 times more than their Middle Eastern and South Asian cousins.[32] On average, adult wolves measure 105–160 cm (41–63 in) in length and 80–85 cm (32–34 in) in shoulder height.[9] The tail measures 29–50 cm (11–20 in) in length. The ears are 90–110 millimetres (3.5–4.3 in) in height, and the hind feet are 220–250 millimetres (8.7–9.8 in).[9] The mean body mass of the extant gray wolf is 40 kg (88 lb), with the smallest specimen recorded