Lions hunt at dusk. They have excellent eyesight and can see well in the dark. The lionesses usually hunt for the entire pride. While the male lion plays little or no part in the hunt, he always takes precedence at the kill, dragging the prey to a chosen spot, then gorging himself before the female and cubs can eat. Hunting is an organized event. During the dry season when water is scarce, lions often lie in wait close to a water hole, waiting for prey to come to drink. Lions prefer to hunt wildebeest and zebra, as these animals are slower and easier to catch than small antelopes and gazelles. When prey is scarce, lions eat almost anything, including carrion (dead or rotting animals). Hunger may drive them to attack larger prey, including giraffe, buffalo, or even rhinoceros, hippopotamus, and elephant calves.