Subscribe to Discovery! | http://www.youtube.com/subscription_center?add_user=discoverynetworks In this Winged Planet web exclusive, demoiselle cranes migrate enter a Himalayan valley of death, where golden eagles pick off the weakest members of the flock. This clip is from the BBC version. | For more Winged Planet, visit http://dsc.discovery.com/tv-shows/winged-planet/videos/#mkcpgn=ytdsc1
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