Afternoon visit coincided with low water. Much of the marshes still frozen. At least 2 goldcrest with chiffchaff in Station Road. At Turf 31 (and probably a few more) greenfinch. This seems to be a regular event in the late afternoon. Kingfisher in the estuary outside the lock gates. A single marsh harrier and a kestrel were active over the area near the lagoon. A small flock of fieldfare (about 6) was the first I have seen on the marsh this year. Two Cettis showed well on the canal bank.