24th - Cuckoo (heard singing)
22nd - 5 Cetti's Warbler, 12 Common Tern, 10 Egyptian Goose
16th - 9 Little Egret, 5 Cetti's Warbler, 24 Common Tern
8th - 5 Cetti's Warbler, 2 Cuckoo (n flight over W end of lake and heard calling from islands), Kingfisher
6th - Kingfisher (on River Colne)
1st - Cuckoo (female bubbling), 2 Red-crested Pochard (males)