North American river otters are powerful semi-aquatic mammals found across New England’s rivers, lakes, and wetlands. Highly social and active year-round, they travel long distances along waterways, leaving tracks, slides, and communal latrine sites that reveal territory and behavior. Excellent swimmers with dense waterproof fur, otters play an important ecological role as top freshwater predators feeding primarily on fish, amphibians, and crustaceans.

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