Group living increases chance of survival

Many animals live in large groups or colonies in order to survive.

Plains animals such as zebras, antelopes and wildebeest have nowhere to hide so they roam the open grasslands in herds of hundreds or thousands to reduce the chance of being attacked.

Some keep a look-out while the rest feed.

When fleeing an attack, their sheer numbers confuse their predators.

Lions, hyenas and wolves live in groups because it's hard to kill the prey alone.

Having chosen a victim, the team spreads out to approach it from different directions, trying to separate it from the herd.