If you take a walk along a small wooded stream that has many fallen trees along its banks, you can expect to find mink tracks somewhere along it. These wetland-loving weasels dig their dens in river banks, often under tree roots, and judging from their tracks, visit them frequently. It is not unusual for one mink to have several dens which it uses as resting spots along a stream. Mink spend a lot of time in the water hunting for fish, aquatic insects and crayfish. Mink are good swimmers and can dive as deep as 16 feet. Tracks will run along the frozen sections of a stream, and then disappear into the water, only to reappear on the ice further downstream when the mink decides to travel on solid ground again.
Like their cousins the otters, mink will slide down snowy inclines on their bellies, as the slide in this photograph illustrates. They are excellent swimmers and can swim underwater to a depth of 18 feet or for a distance of 100 yards. Look for tracks and slides along streams, in cattail marshes and in swamps, where they forage for crayfish, frogs, fish, small mammals and invertebrates. One of its largest prey is the muskrat. A male mink (larger and stronger than a female mink) captures one by wrapping its body around the muskrat and then biting its neck. Mink make the most of their meals, recycling what they can – the winter nest of one mink consisted almost entirely of the fur of muskrats.