The mound is a large snow hill where under the soft snow is a hard block of ice. But the ice is not just ice, it is a home to much prey. Tunnels and systems all are hollowed out of the ice from mice, birds, rabbits and more. Many say that water voles had been swimming in the water before it became ice and made tunnels as it hardened. Soon more and more animals started moving in to breed and give birth. The ice is cold yet sturdy. It is a good place for prey but only at one time a year during spring.
