Minks are small weasels with sleek dark brown to black coats and tails. They can have spots of white fur on the chin or belly. Minks are found around water sources in dense coniferous forests, where they hunt for frogs, fish, waterbirds, eggs, mice, voles, snakes, and aquatic insects. Minks are aggressive hunters and sometimes kill more than they can eat. They store surplus food in their dens, which are usually dug into riverbanks.