Black grouse: Scandinavia's samurai warriors
Black grouse combat is a strange mixture of Tom and Jerry and martial arts as cameraman Barrie Britton discovers while filming them in action.
Frozen Planet will be broadcast in 2011 on BBC One.
Available since: Mon 27 Jul 2009
This clip is from
The ultimate portrait of Earth's polar regions: the last great wilderness on the planet.
Be captivated, informed and inspired by the world's wildlife.