What animals such as butterflies, frogs, and others, change during their lives?

The arctic fox lives in the Arctic tundra, and it is capable of changing its fur color to fit the seasons. A fully grown Arctic fox can weigh up to ten pounds, which makes it stouter than it's relative, the red fox. The arctic fox has a distinctive coat that adapts to the changing seasons, and it helps to avoid predatory animals.

In early spring, it sheds its winter coat for a shorter, brown coat that allows it to blend in with dirt and the forest floor during the summer. By November of each year, the fur has completely changed again to a thick, entirely white winter coat. The white coat allows the fox to blend in with the snow, which helps makes it almost undetectable to predators.