A northern fox primarily responds to the seasonal change of fall by developing a thicker coat of fur. This helps the fox to stay warm as the temperatures begin to drop. Additionally, the fox will begin to store food in preparation for the winter months when food may be scarce. The fox may also become more active during the fall to take advantage of the abundance of food before it becomes scarce. Overall, the northern fox adapts well to the changes that come with fall and uses its instincts to survive the upcoming winter.