Excluding pets such as cats and dogs, Order Carnivora is represented on Mount Desert Island and the adjacent ocean by 5 families:
   Canidae (2 genera, 2 species): Canis latrans (coyote) and Vulpes vulpes (red fox).
   Ursidae (1 genus, 1 species): Ursus americanus (black bear).
   Mustelidae (4 genera, 5 species): Lutra canadensis (river otter), Martes pennanti (fisher), Mustela erminea (short-tailed weasel), Mustela frenata (long-tailed weasel), and Neovison vison (mink).
   Procyonidae (1 genus, 1 species): Procyon lotor (common raccoon).
   Phocidae (2 genera, 2 species): Halichoerus grypus (gray seal) and Phoca vitulina (harbor seal).

Mustelidae: Lutra canadensis (river otter). From p. 140 of "Tracking & the Art of Seeing" by Paul Rezendes: "When otters move on snow, they tend to bound a few steps, then get down on their belly and slide, pushing themselves along with their short legs as though they were swimming. ... The slide is usually 6" to 10" wide." The image of the slide was taken on 17 January 2008 at the pond that is north of Eagle Lake Road (Bar Harbor) and just east of the Eagle Lake parking lot. The picture of the river otter was taken by Don Lenahan on 27 March 2008 at the marsh along the west side of Schooner Head Road, from which there is a clear view of the east face of Champlain Mountain."

Procyonidae: Procyon lotor (raccoon), the sole Mount Desert Island member of Family Procyonidae. This photograph was taken at a "bird" feeder one night in April 2007 at a private residence in Bass Harbor.