It seems to me more likely that it is the mice (in the dark under the snow) that are using the earth’s magnetic field to guide their tunnel digging and travel. The fox is just listening to the mice. (Look at the way it cocks its head when hunting.) When the fox correctly determines the direction of travel of the mice, it has a much better chance of getting a meal.
It seems to me more likely that it is the mice (in the dark under the snow) that are using the earth’s magnetic field to guide their tunnel digging and travel. The fox is just listening to the mice. (Look at the way it cocks its head when hunting.) When the fox correctly determines the direction of travel of the mice, it has a much better chance of getting a meal.