When you've got it all, why give it up? We expect animals to choose the easiest option for food and comfort, but that's not always predictable.

Once a year land bound Christmas Island red crabs are called back to the sea to birth their young, encountering obstacles in the forest along the way.

To many animals in the wild finding a mate is blood sport, driving to make long journeys, let down their guard, and even fight each other to the death.