Arctic fox is one of the cutest animals in the tundra. Here are a few adaptations that make them suitable to this biome: They have short heavily furred, rounded ears (to protect from the cold). This limits the escape of body heat from the fox. Their coat changes color (in the summer the fur is reddish brown to act as a camouflage, and in the winter it turns white to blend into the snowy environment. It develops a layer of insulating fat to keep warm. They have a phenomenal breeding rate. They are able to remain active during temperatures of around -50 degrees celcus thus for making it possible to function and survive in extreme circumstances.