The riparian myotis has long, woolly fur. The dorsal fur can vary geographically from a reddish to a blackish tinge. Individuals in the south tend to have a darker dorsal region, and individuals in the north tend to have a reddish dorsal region. The dorsal hairs are unicolor and the
plagiopatagium is broadly attached to the foot at the base of the toes. The ears are short compared to the eyes and nostrils. The
tragus is pointed and curves slightly outward. The ventral hairs are bicolored, with a dark-brown base and yellowish tips. ==Range and habitat==