Why bears hibernate - Big Sky Bears - BBC
Why do bears hibernate? Watch this to discover how much effort is spent on survival during winter in the world of the Big Sky Bears. Visit http://www.bbcearth.com for all the latest animal news and wildlife videos and watch more high quality videos on the new BBC Earth YouTube channel here: http://www.youtube.com/bbcearth
新增時間:2012/01/29 04:09:55
+0900 (JST)
播放數:100 評論數:0
影片原始網站: youtube.com
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