Knot, CU excited calls at roost, the mixed flock reakting to new Knot, CU flight calls and wing-beats from small group, Oystercat Knot, CU sounds of very large flock take-offs, circling and call Knot, CU wind-rush from a small group flying overhead, Curlew an Knot, CU wind-rush from flocks flying to high-tide roost, some c Knot, MCU flock calls, several small flock take-offs, wing-beats