North American River Otter (Lontra canadensis) (Susan Roehl) Tags: yellowstonenationalparkinwinter wyoming usa northamericanriverotter lontracanadensis commonotter semiaquatic foundalongwaterwaysandcoasts mustelidae weasalfamily continuallyunderdeclineintheus habitatloss pollution sueroehl photographictours naturalexposures lumixdmcgh4 100400mmlens phototakenfromroad handheld coth5 ngc