North American River Otter

The North American River Otter is the only river otter found north of Mexico. Its luscious pelt, which is waterproof and allows the river otter to regulate its temperature, was also a staple of the French fur trade in the 1700-1800s, has drawn hunters for hundreds of years. The color of its fur ranges from grey and white to brown and black.
http://www.defenders.org/north-american-river-otter/basic-facts