27th - Kingfisher (on River Colne), 2 Cetti's Warbler, 16 Common Tern (adults plus 4 chicks on Tern raft), 9 Sand Martin, Red-crested Pochard, 9 Egyptian Goose, 2 Cetti's Warbler

19th - c.40 Swallow (over lake feeding and resting), 2 Kingfisher (one with food visiting nest site), 2 Cetti's Warbler

16th - 3 Cetti's Warbler (calling), 6 Egyptian Goose, circa 28 Common Tern

12th - Swift, 8 Swallow, 2 Reed Warbler, 2 Cetti's Warbler, 5 Egyptian Goose, Kingfisher, 16 Common Tern (8 occupied nests on rafts), 2 Cetti's Warbler

8th-10th - Marsh Warbler, on far bank of River Colne

8th - Kingfisher, 4 Cetti's Warbler

7th - 6 Egyptian Goose, 26 Common Tern

3rd - 4 Reed Warbler, 6 Sedge Warbler, 12 Common Tern (on new Tern raft), 3 Egyptian Goose

2nd - 6+ Cetti's Warbler (heard), Red-crested Pochard,3 Egyptian Goose, Reed Warbler, 6+ Swallow, 3 Kingfisher (near Kingfisher bank), Willow Warbler