This video is called Black bear and cubs in hibernation – BBC wildlife.
From eNature Blog in the USA:
Bears Have Evolved An Interesting Solution To A Winter Plumbing Problem
Posted on Sunday, April 14, 2013 by eNature
Not once you’ve heard where it’s been.
The bear plug is a curious product of bear hygiene. Bears do not use their bedrooms for bathrooms, and excrement is never found in a bear’s den.
So how do they survive the time holed up in their winter den without relieving themselves? That’s where the bear plug comes in.
A few days before retiring for the winter, a bear begins gorging itself on indigestible materials, things like leaves and pine needles and even pieces of its own hair. This roughage passes along the digestive tract and lodges low in the large intestine, forming an anal plug as much as one foot long. And there it remains until spring, when the bear emerges … and finally gets some relief.
- The Black Bear (thewildlifejournal.wordpress.com)
- Winter Ecology: Black Bear Hibernation – Untamed Science Video (olecommunity.com)
- Black Bears (cpaafterschool.wordpress.com)
- Hibernating Hideout For Big Bruin (wnep.com)
- Minnesota Bears Emerging From Hibernation (minnesota.cbslocal.com)
- As bears come out of hibernation, Flathead residents warned on trash, dog food (missoulian.com)
- Facts on Black Bear Habitats and Their Food Habits (thewildlifejournal.wordpress.com)
- Bear Activity Picking Up (connecticut.cbslocal.com)
- Grizzly, black bears emerging from hibernation in Glacier National Park (missoulian.com)
- Hibernating Bears Waking up in the Anchorage Area (abcnews.go.com)