The heaviest land mammal is the African bush elephant, which has a weight of up to 10.1 tonnes (11.1 short tons). It measures 10–13 ft at the shoulder and consumes around 230 kilograms (500 lb) of vegetation a day. Its tusks have been known to reach 2.7 m (9 ft) in length, although in modern populations they are most commonly recorded at a length of 0.6–0.9 metres (2.0–3.0 ft). The average walking speed of an elephant is 7.2 km/h (4.5 mph), but they can run at recorded speeds of up to 24 km/h (15 mph).