Wondersurf 
Life outside in winter
How do they stay warm?
Visiting the alpine marmots
"Our family is enjoying the last sunny days of September. We play and eat for all we're worth. At the end of September, it can snow here at 2000 metres above sea level. Then we crawl into our warm winter den. It is seven metres below ground and it's frost-free there. We snuggle up close together and sleep until spring arrives. We only wake up when we have to go to the loo."
Count the marmots in the video!