African elephants spend most of their time eating. They can gobble up to 600 pounds of grass, leaves and roots in one day! That might explain why they are the largest and the heaviest land mammals in the world. Here's how the heavies of the animal kingdom stack up.
1. Elephant (up to 14, 000 pounds)
2. Hippopotamus (up to 8,000 pounds)
3. Rhinoceros (up to 5,000 pounds)
4. Giraffe (up to 4,200 pounds)
5. Water Buffalo (up to 2,600 pounds)
Source: San Diego Zoo