UNDERWATER WS semi LA of murre birds swimming on surface and diving down to depths below, bubbles everywhere, ice floes in background (humorous, funny, playful footage). UNDERWATER WS of murre birds swimming on surface, diving down to depths, bubbles everywhere, ice floes in background (humorous, funny, playful footage). UNDERWATER MWS SA of flock of murre birds just as they start descent from surface, swimming away from camera into the distance, single murre coming up from depths to surface after others disappear from view. UNDERWATER TRACKING MS POV under thick layer of surface ice. TRACKING WS POV under thick layer of surface ice, murre birds diving, some swimming towards camera. (41227)