Highlight of an evening visit to Castle Lake were two stunning summer plumaged Black-necked Grebe (two poor record pictures below).
Other birds seen included 5 Teal, 1 Cormorant, 13 Oystercatcher, 2 Green Sandpiper, 1 Common Sandpiper and 10 Black-headed Gull including a juvenile.
On Stoneybeck Lake was the female Shoveler with 8-9 ducklings.
Earlier in the day John Olley noted the following from the Castle Lake hide;
Hobby (juv) close to the hide then sat on fence for 30 minutes, 200 Sand Martin, Green Sandpiper, 12 Oystercatcher, juveniles of Tree Sparrow, Swallow, Skylark and Yellow Wagtail around the hide.
(Black-necked Grebe is species #139 on my BM list)