The entire breeding colony of Black-headed Gulls on No 6 tank abandoned their nests for the whole period I was birding there (2.1/2 hrs). The cause of this is directed at a Fox looking for food. It remains to be seen if the gulls return to their nests?
5 Avocet, 42 Mute Swan, 12 Pochard (one female), 25 Tufted Duck, 10 Teal and 9 Shoveler. Marsh Harrier (male) flew over heading west and a Cuckoo was watched from its usual hiding place.
A Lesser Whitethroat sang from a Hawthorn hedge (left hand side of the approach road, leading to the dirt track ramp to No 6 tank).
Grey Heron close to nest site on No 6 tank.
Upper: Looking south from the north side of No 6 tank.
Lower: Looking south-west from the same position.
Images by WSM