From 38:30, collecting for bird's nest soup (use link below):
www.bbc.co.uk/iplayer/episode/p02m63cs/earths-natural-wonders-living-on-the-edge-1-extreme-wonders
Mike
www.bbc.co.uk/iplayer/episode/p02m63cs/earths-natural-wonders-living-on-the-edge-1-extreme-wonders
Mike