Asian Elephants are herbivores and need to eat about 10% of their body weight every day: up to 150-200kg for adults. As a result they may spend up to 18 hours per day feeding on grasses, leaves, fruits, roots, vines, and bark of as many as 200 different species. They also need to drink up to 200 litres of water every day, and their trunk can take in 5-10 litres in one suck.