April 19th
It was immediately apparent as we arrived at Chamber's Wall this morning that there had been an overnight arrival of Whitethroats and in our walk from Chamber's Wall to Coldharbour and back along the Green Wall we counted 18 singing males.

Male Whitethroat

Other birds we encountered included 1 Jay, 14 Linnets, 7 Reed Warblers, 7 Blackcaps, 4 Goldfinches, 3 Chiffchaffs, 3 Cetti's Warblers, 1 Golden Plover, 2 Yellow Wagtails, 6 Mallard, 2 Tufted Duck, 3 Mediterranean Gulls E, 2 Gannets E, 8 Oystercatchers, 6 Ringed Plovers, 2 Greylag Geese W, 4 Swallows W, 12 Corn Buntings, 12 Sedge Warblers, 10 Mute Swans, 1 Greenshank W (146th), 1 Kestrel, 1 Grey Heron, 3 Common Buzzards and 1 Willow Warbler.
Marc Heath did a similar walk but earlier arriving at Chamber's Wall at 0545 and recorded 2 Red-legged Partridges, 5 Skylarks, 50 Cormorants, 2 Reed Warblers, 10 Whitethroats, 3 Cetti's Warblers, 12 Sedge Warblers, 2 Tufted Duck, 1 Chiffchaff, 3 Blackcaps, 30 Corn Buntings, 1 male Whinchat (147th), 1 Short-eared Owl, 7 Shelduck, 9 Mute Swans, 10 Oystercatchers, 1 Grey Heron, 2 Yellow Wagtails, 1 Curlew, 2 Whimbrel, 1 Swallow, 1 Redshank, 2 Stonechats, 5 Reed Buntings, 1 Wheatear, 2 Dunlin, 3 Ringed Plovers, 2 Greenshank W, 1 Marsh Harriers, 1 Lesser Whitethroat (148th) and 1 Merlin.
Derek Smith covered the eastern half of the Marsh between 0730 and 1200 walking from Shuart to Chamber's Wall and back via Plumpudding and Brooksend. Birds he saw included 18 Mediterranean Gulls, 4 Common Buzzards, 2 Marsh Harriers, 1 Sparrowhawk, 2 Tufted Duck, 1 Green Sandpiper, 1 Wheatear, 1 Common Redstart, 2 Lesser Whitethroats, 32 Whitethroats, 37 Sedge Warblers, 3 Reed Warblers, 11 Blackcaps, 14 Chiffchaffs, 3 Willow Warblers, 5 Cetti's Warblers and 9 Corn Buntings.
Nick Keen was also out this morning and found 3 Ring Ouzels, 2 males and 1 female, together by the White Populars, 1 Cuckoo (149th) calling at the rear of the Oyster Farm, 1 Fulmar, 1 Whimbrel, 1 Grey Plover, 3 Yellow Wagtails, 2 Wheatears, 150+ Sanderling, 40+ Corn Buntings, 12 Whitethroats, 1 Reed Warbler and 10+ Sedge Warblers.
During the afternoon at Shuart, Marc Heath saw a male Brambling and a Brimstone butterfly.

Brimstone - Marc Heath