Why does the Arctic fox change its colour?
The Arctic fox is a small white fox that lives in the Arctic regions of the Northern Hemisphere.
Here, the land scape is covered with snow in winter, and the fox's fur is snowy white too. This makes it almost invisible against the background, so that the rodents and hares that it hunts will not be able to see it as it creeps up on them.
The arctic fox also steals half eaten fish caught by polar bears, and wants to do so without being seen by them either. The white fur is a useful disguise for this purpose too.
As the snow melts, and the days become warmer, the arctic fox will shed its white coat, and grow a new one of brown to blend in with the colours of summer.