It’s the time of year when the salmon make their annual pilgrimage upstream to spawn, but leaping past the waiting hungry bears is no easy task. Subscribe to BBC Earth: http://bit.ly/BBCEarthSubBBC Earth YouTube Channel: http://www.youtube.com/BBCEarth BBC Earth Facebook http://www.facebook.com/bbcearth (ex-UK only) BBC Earth Twitter http://www.twitter.com/bbcearth Visit http://www.bbc.com/earth/world for all the latest animal news and wildlife videos This is a channel from BBC Studios who help fund new BBC programmes.