River otter reports in the District of Columbia concentrate along the Potomac River waterfront near Georgetown, the Anacostia River, and the shoreline around Theodore Roosevelt Island. Those are the district’s main stretches of connected, fish-holding water, exactly the shoreline cover this species needs.
A river otter hunts by diving and rolling through shallow edges and riffles after fish and crayfish, denning in a hollow bank, tree, or an old beaver lodge along the shore. Its return to cleaner stretches of the Potomac and Anacostia mirrors a national pattern of otters recolonizing rivers as water quality and bank habitat improve.
NatureServe lists the species as critically imperiled within DC even though records here appear at a moderate, steady pace across most months. That combination, a real number of reports paired with a precarious rank, shows how small an urban otter population can be even where it’s clearly present.
