Winter Wildlife Feature III - River Otters

There is little question that the next species in my series of winter wildlife finds the most creative ways to have fun. Humans aren’t the only ones enthralled with the feeling of sliding on snow. While we use skis, boards, or sleds, river otters need look no further than their long and slender bodies. When on land, otters cover ground with a hop, hop, slide, hop, hop, slide movement pattern. Sliding on the snow and ice certainly allows them to travel more efficiently, but spend any time with otters and there’s no denying the routine is as much, if not more, for fun as it is for practicality. 

Yellowstone River Otters
River Otters Sliding


Other than playful antics to keep their mind off the cold, otters have some impressive adaptations and strategies for winter survival. River otter’s lengthy guard hairs, and dense underfur, which traps insulating air, keeps them warm in extreme temperatures. On top of that, oil secreted from the sebaceous gland actually waterproofs their coat, preventing water from reaching their skin. To remain well insulated they must replace the air in their underfur after swimming, and they do this by rolling around in the snow, and yes, you’ve guessed it, playfully. 
Since the water temperatures are warmer than the air, otters opt to spend more time underwater. They will often travel and hunt underneath the ice shelves which line the rivers and creeks during winter months. An otter may stay below the ice indefinitely by breathing in the air pockets trapped beneath the ice.

River Otter Swimming