Do river otters sleep at night?
yes otters do sleep at night
River otters sleep in their holt's (dens), which can be found under tree roots along river banks or in dense undergrowth adjacent to rivers. Natural holt's are becoming pretty rare nowadays, due to the removal of old riverbank trees; however conservation groups are providing artificial holt's in strategic places to allow their natural habitat to recover. Otters may have several holt's a long the river bank, which provide shelter when out feeding and patrolling their…
There are sea otters and other otters. In the category of "other" otters, you can include the North American River Otter, Giant Otter of South America, Asian small clawed otters, Congo clawless otters, Capr clawless otters, Southern river otters, hairy nosed otters, spot necked otters, neo tropical long tailed otters, and others I may fail to mention.