John Watts: Britain Year List 2021 BOU, All records: Top Blockers Record(s) 1 to 186 of 186 total. Seq. Species Scientific Name Seen By Other Listers Other Listers (%) 1 Brent Goose Branta bernicla 359 76.55 2 Canada Goose Branta canadensis 460 98.08 3 Greylag Goose Anser anser 449 95.74 4 Pink-footed Goose Anser brachyrhynchus 357 76.12 5 Mute Swan Cygnus olor 461 98.29 6 Whooper Swan Cygnus cygnus 310 66.10 7 Egyptian Goose Alopochen aegyptiaca 370 78.89 8 Shelduck Tadorna tadorna 441 94.03 9 Mandarin Duck Aix galericulata 310 66.10 10 Garganey Spatula querquedula 282 60.13 11 Shoveler Spatula clypeata 444 94.67 12 Gadwall Mareca strepera 442 94.24 13 Wigeon Mareca penelope 442 94.24 14 Mallard Anas platyrhynchos 461 98.29 15 Pintail Anas acuta 390 83.16 16 Teal Anas crecca 445 94.88 17 Red-crested Pochard Netta rufina 170 36.25 18 Pochard Aythya ferina 426 90.83 19 Ring-necked Duck Aythya collaris 190 40.51 20 Tufted Duck Aythya fuligula 457 97.44 21 Scaup Aythya marila 244 52.03 22 Goldeneye Bucephala clangula 383 81.66 23 Smew Mergellus albellus 159 33.90 24 Goosander Mergus merganser 390 83.16 25 Ruddy Duck Oxyura jamaicensis 35 7.46 26 Red Grouse Lagopus lagopus 209 44.56 27 Grey Partridge Perdix perdix 294 62.69 28 Pheasant Phasianus colchicus 454 96.80 29 Red-legged Partridge Alectoris rufa 400 85.29 30 Swift Apus apus 430 91.68 31 Cuckoo Cuculus canorus 382 81.45 32 Rock Dove (Feral Pigeon) Columba livia 403 85.93 33 Stock Dove Columba oenas 416 88.70 34 Woodpigeon Columba palumbus 463 98.72 35 Collared Dove Streptopelia decaocto 453 96.59 36 Water Rail Rallus aquaticus 353 75.27 37 Moorhen Gallinula chloropus 458 97.65 38 Coot Fulica atra 456 97.23 39 Crane Grus grus 199 42.43 40 Little Grebe Tachybaptus ruficollis 443 94.46 41 Great Crested Grebe Podiceps cristatus 447 95.31 42 Black-necked Grebe Podiceps nigricollis 255 54.37 43 Oystercatcher Haematopus ostralegus 448 95.52 44 Avocet Recurvirostra avosetta 394 84.01 45 Grey Plover Pluvialis squatarola 343 73.13 46 Golden Plover Pluvialis apricaria 389 82.94 47 Ringed Plover Charadrius hiaticula 399 85.07 48 Little Ringed Plover Charadrius dubius 360 76.76 49 Lapwing Vanellus vanellus 453 96.59 50 Eurasian Whimbrel Numenius phaeopus 349 74.41 51 Curlew Numenius arquata 436 92.96 52 Bar-tailed Godwit Limosa lapponica 368 78.46 53 Black-tailed Godwit Limosa limosa 411 87.63 54 Woodcock Scolopax rusticola 291 62.05 55 Snipe Gallinago gallinago 413 88.06 56 Grey Phalarope Phalaropus fulicarius 114 24.31 57 Common Sandpiper Actitis hypoleucos 397 84.65 58 Green Sandpiper Tringa ochropus 351 74.84 59 Wood Sandpiper Tringa glareola 270 57.57 60 Redshank Tringa totanus 434 92.54 61 Greenshank Tringa nebularia 382 81.45 62 Turnstone Arenaria interpres 411 87.63 63 Knot Calidris canutus 349 74.41 64 Ruff Calidris pugnax 369 78.68 65 Curlew Sandpiper Calidris ferruginea 260 55.44 66 Long-toed Stint Calidris subminuta 128 27.29 67 Sanderling Calidris alba 369 78.68 68 Dunlin Calidris alpina 418 89.13 69 Purple Sandpiper Calidris maritima 265 56.50 70 Little Stint Calidris minuta 290 61.83 71 Caspian Tern Hydroprogne caspia 54 11.51 72 Arctic Tern Sterna paradisaea 290 61.83 73 Common Tern Sterna hirundo 407 86.78 74 Sandwich Tern Thalasseus sandvicensis 372 79.32 75 Elegant Tern Thalasseus elegans 84 17.91 76 Little Gull Hydrocoloeus minutus 281 59.91 77 Kittiwake Rissa tridactyla 382 81.45 78 Bonaparte's Gull Chroicocephalus philadelphia 107 22.81 79 Black-headed Gull Chroicocephalus ridibundus 460 98.08 80 Mediterranean Gull Ichthyaetus melanocephalus 366 78.04 81 Common Gull Larus canus 418 89.13 82 Herring Gull Larus argentatus 457 97.44 83 Great Black-backed Gull Larus marinus 433 92.32 84 Lesser Black-backed Gull Larus fuscus 448 95.52 85 Puffin Fratercula arctica 305 65.03 86 Black Guillemot Cepphus grylle 206 43.92 87 Razorbill Alca torda 377 80.38 88 Common Guillemot Uria aalge 387 82.52 89 Red-throated Diver Gavia stellata 330 70.36 90 Great Northern Diver Gavia immer 287 61.19 91 Fulmar Fulmarus glacialis 389 82.94 92 Manx Shearwater Puffinus puffinus 246 52.45 93 Gannet Morus bassanus 405 86.35 94 Cormorant Phalacrocorax carbo 457 97.44 95 Bittern Botaurus stellaris 294 62.69 96 Little Egret Egretta garzetta 444 94.67 97 Cattle Egret Bubulcus ibis 300 63.97 98 Great White Egret Ardea alba 387 82.52 99 Grey Heron Ardea cinerea 454 96.80 100 Osprey Pandion haliaetus 294 62.69 101 Sparrowhawk Accipiter nisus 443 94.46 102 Goshawk Accipiter gentilis 195 41.58 103 Marsh Harrier Circus aeruginosus 406 86.57 104 Red Kite Milvus milvus 434 92.54 105 Buzzard Buteo buteo 457 97.44 106 Barn Owl Tyto alba 371 79.10 107 Short-eared Owl Asio flammeus 262 55.86 108 Tawny Owl Strix aluco 364 77.61 109 Hoopoe Upupa epops 92 19.62 110 Kingfisher Alcedo atthis 410 87.42 111 Lesser Spotted Woodpecker Dryobates minor 117 24.95 112 Great Spotted Woodpecker Dendrocopos major 443 94.46 113 Green Woodpecker Picus viridis 395 84.22 114 Kestrel Falco tinnunculus 453 96.59 115 Merlin Falco columbarius 275 58.64 116 Hobby Falco subbuteo 347 73.99 117 Peregrine Falco peregrinus 421 89.77 118 Jay Garrulus glandarius 447 95.31 119 Magpie Pica pica 460 98.08 120 Chough Pyrrhocorax pyrrhocorax 194 41.36 121 Jackdaw Coloeus monedula 459 97.87 122 Rook Corvus frugilegus 453 96.59 123 Carrion Crow Corvus corone 460 98.08 124 Hooded Crow Corvus cornix 193 41.15 125 Raven Corvus corax 415 88.49 126 Coal Tit Periparus ater 446 95.10 127 Blue Tit Cyanistes caeruleus 463 98.72 128 Great Tit Parus major 461 98.29 129 Bearded Tit Panurus biarmicus 299 63.75 130 Skylark Alauda arvensis 440 93.82 131 Sand Martin Riparia riparia 426 90.83 132 Swallow Hirundo rustica 437 93.18 133 House Martin Delichon urbicum 432 92.11 134 Cetti's Warbler Cettia cetti 387 82.52 135 Long-tailed Tit Aegithalos caudatus 453 96.59 136 Willow Warbler Phylloscopus trochilus 415 88.49 137 Chiffchaff Phylloscopus collybita 441 94.03 138 Two-barred Greenish Warbler Phylloscopus plumbeitarsus 69 14.71 139 Sedge Warbler Acrocephalus schoenobaenus 413 88.06 140 Blyth's Reed Warbler Acrocephalus dumetorum 43 9.17 141 Reed Warbler Acrocephalus scirpaceus 399 85.07 142 River Warbler Locustella fluviatilis 128 27.29 143 Grasshopper Warbler Locustella naevia 264 56.29 144 Blackcap Sylvia atricapilla 437 93.18 145 Garden Warbler Sylvia borin 343 73.13 146 Lesser Whitethroat Curruca curruca 332 70.79 147 Whitethroat Curruca communis 421 89.77 148 Goldcrest Regulus regulus 427 91.04 149 Wren Troglodytes troglodytes 458 97.65 150 Nuthatch Sitta europaea 431 91.90 151 Treecreeper Certhia familiaris 420 89.55 152 Starling Sturnus vulgaris 458 97.65 153 Song Thrush Turdus philomelos 454 96.80 154 Mistle Thrush Turdus viscivorus 437 93.18 155 Redwing Turdus iliacus 443 94.46 156 Blackbird Turdus merula 462 98.51 157 Fieldfare Turdus pilaris 422 89.98 158 Ring Ouzel Turdus torquatus 261 55.65 159 Spotted Flycatcher Muscicapa striata 330 70.36 160 Robin Erithacus rubecula 462 98.51 161 Taiga Flycatcher Ficedula albicilla 47 10.02 162 Pied Flycatcher Ficedula hypoleuca 286 60.98 163 Red-flanked Bluetail Tarsiger cyanurus 52 11.09 164 Redstart Phoenicurus phoenicurus 335 71.43 165 Stonechat Saxicola rubicola 432 92.11 166 Wheatear Oenanthe oenanthe 409 87.21 167 Dipper Cinclus cinclus 289 61.62 168 House Sparrow Passer domesticus 458 97.65 169 Dunnock Prunella modularis 462 98.51 170 Yellow Wagtail Motacilla flava 368 78.46 171 Grey Wagtail Motacilla cinerea 440 93.82 172 Pied Wagtail Motacilla alba 460 98.08 173 Meadow Pipit Anthus pratensis 434 92.54 174 Tree Pipit Anthus trivialis 307 65.46 175 Rock Pipit Anthus petrosus 372 79.32 176 Chaffinch Fringilla coelebs 457 97.44 177 Brambling Fringilla montifringilla 310 66.10 178 Bullfinch Pyrrhula pyrrhula 429 91.47 179 Greenfinch Chloris chloris 453 96.59 180 Linnet Linaria cannabina 437 93.18 181 Lesser Redpoll Acanthis cabaret 341 72.71 182 Goldfinch Carduelis carduelis 454 96.80 183 Siskin Spinus spinus 414 88.27 184 Snow Bunting Plectrophenax nivalis 254 54.16 185 Yellowhammer Emberiza citrinella 407 86.78 186 Reed Bunting Emberiza schoeniclus 439 93.60