Visual of thick-billed murre colony on cliffs; CS of chick and egg on ledge, hand of researcher Tony Gascon grabbing chick (0:16). CS of murre with fish in his beak (0:14). HAMCS of researcher on cliff (0:17). Several LASs and HASs of numerous birds nesting on ledges, dropping off and landing (4:02). CSs and CUs of murres on ledges resting, mating, fighting, preening (2:15). MS of nesting site and ocean below (0:17).