CS of woman sitting on rock in nature interpretation centre in estuary on West Coast of Canada, with notebook in hand, TILT DOWN to CS of two black swans in front of her (24 ft). CSs and CUs of American coots on shore (41 ft). CSs of group of children walking along path in park (12 ft). CSs of crow on ground (23 ft). CSs of mallards (female) in marsh (104 ft).