With its long, wobbly-looking legs it may seem surprising that a giraffe can reach a speed of up to 56 kilometres per hour. The tallest land mammal is a fast runner but an unstable drinker. Drinking can pose serious problems for giraffes. To get to water, a giraffe needs to spread its front legs and crane its neck down at an awkward angle. This position leaves the giraffe clumsy and vulnerable to predators. Thankfully giraffes only need to drink water once a day, because they can get almost all the water they need from the plants they eat. For this they have a special tool: a 50 centimetre-long tongue! The giraffe can just wrap its tongue around the foliage and pull the leaves into its mouth. The tongue also serves as a personal grooming device: a giraffe occasionally uses it to pick its nose and to clean its ears out.