Historically, river otters ranged over the most of the United States and Canada, but became rare, or were extirpated during the fur trading period. Presently, they are distributed from approximately 25? N latitude in Florida through the Gulf of Mexico, to 70? N latitude in Alaska; and from eastern Newfoundland west throughout Canada, Alaska and the Aleutian Islands (Chapman and Feldhamer 1982). River otters occur throughout the Indian River Lagoon system.
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