At 16 to 20 feet tall and weighing up to 3,500 pounds, giraffes are the tallest living land mammal in the world. The legs of giraffes are longer than most adult humans, and they are well-known for having long necks that may reach up to six feet in length, accounting for about half of their total height. The biggest terrestrial mammal currently alive is the African bush elephant, with males weighing an average of 6.0 tonnes (13,200 lb). When it was shot in Angola in 1974, the tallest elephant ever measured was 10.67 metres (35.0 feet) from trunk to tail and 4.17 metres (13.7 feet) when it was resting on its side, meaning that its shoulder height when standing was 3.96 metres (13.0 feet). Although the biggest animal alive today is the blue whale, with a maximum known weight of 190 tonnes, the blue whale is the biggest animal alive today, yet it is a marine mammal, not a terrestrial one. The giraffe is the tallest mammal on land.