Joe Dobinson: Britain Year List 2021 BOU, All records: Top Blockers Record(s) 1 to 172 of 172 total. Seq. Species Scientific Name Seen By Other Listers Other Listers (%) 1 Canada Goose Branta canadensis 460 98.08 2 Greylag Goose Anser anser 449 95.74 3 Pink-footed Goose Anser brachyrhynchus 357 76.12 4 Mute Swan Cygnus olor 461 98.29 5 Whooper Swan Cygnus cygnus 310 66.10 6 Shelduck Tadorna tadorna 441 94.03 7 Mandarin Duck Aix galericulata 310 66.10 8 Shoveler Spatula clypeata 444 94.67 9 Gadwall Mareca strepera 442 94.24 10 Wigeon Mareca penelope 442 94.24 11 Mallard Anas platyrhynchos 461 98.29 12 Pintail Anas acuta 390 83.16 13 Teal Anas crecca 445 94.88 14 Pochard Aythya ferina 426 90.83 15 Ring-necked Duck Aythya collaris 190 40.51 16 Tufted Duck Aythya fuligula 457 97.44 17 Scaup Aythya marila 244 52.03 18 Eider Somateria mollissima 333 71.00 19 Goldeneye Bucephala clangula 383 81.66 20 Goosander Mergus merganser 390 83.16 21 Red-breasted Merganser Mergus serrator 324 69.08 22 Red Grouse Lagopus lagopus 209 44.56 23 Black Grouse Lyrurus tetrix 102 21.75 24 Grey Partridge Perdix perdix 294 62.69 25 Pheasant Phasianus colchicus 454 96.80 26 Quail Coturnix coturnix 87 18.55 27 Red-legged Partridge Alectoris rufa 400 85.29 28 Swift Apus apus 430 91.68 29 Pacific Swift Apus pacificus 10 2.13 30 Cuckoo Cuculus canorus 382 81.45 31 Rock Dove (Feral Pigeon) Columba livia 403 85.93 32 Stock Dove Columba oenas 416 88.70 33 Woodpigeon Columba palumbus 463 98.72 34 Collared Dove Streptopelia decaocto 453 96.59 35 Water Rail Rallus aquaticus 353 75.27 36 Moorhen Gallinula chloropus 458 97.65 37 Coot Fulica atra 456 97.23 38 Little Grebe Tachybaptus ruficollis 443 94.46 39 Great Crested Grebe Podiceps cristatus 447 95.31 40 Oystercatcher Haematopus ostralegus 448 95.52 41 Avocet Recurvirostra avosetta 394 84.01 42 Golden Plover Pluvialis apricaria 389 82.94 43 Ringed Plover Charadrius hiaticula 399 85.07 44 Little Ringed Plover Charadrius dubius 360 76.76 45 Lapwing Vanellus vanellus 453 96.59 46 Eurasian Whimbrel Numenius phaeopus 349 74.41 47 Curlew Numenius arquata 436 92.96 48 Black-tailed Godwit Limosa limosa 411 87.63 49 Jack Snipe Lymnocryptes minimus 232 49.47 50 Woodcock Scolopax rusticola 291 62.05 51 Snipe Gallinago gallinago 413 88.06 52 Common Sandpiper Actitis hypoleucos 397 84.65 53 Redshank Tringa totanus 434 92.54 54 Greenshank Tringa nebularia 382 81.45 55 Turnstone Arenaria interpres 411 87.63 56 Knot Calidris canutus 349 74.41 57 Ruff Calidris pugnax 369 78.68 58 Red-necked Stint Calidris ruficollis 58 12.37 59 Sanderling Calidris alba 369 78.68 60 Dunlin Calidris alpina 418 89.13 61 Purple Sandpiper Calidris maritima 265 56.50 62 Arctic Tern Sterna paradisaea 290 61.83 63 Common Tern Sterna hirundo 407 86.78 64 Roseate Tern Sterna dougallii 143 30.49 65 Sandwich Tern Thalasseus sandvicensis 372 79.32 66 Kittiwake Rissa tridactyla 382 81.45 67 Black-headed Gull Chroicocephalus ridibundus 460 98.08 68 Mediterranean Gull Ichthyaetus melanocephalus 366 78.04 69 Common Gull Larus canus 418 89.13 70 Herring Gull Larus argentatus 457 97.44 71 Great Black-backed Gull Larus marinus 433 92.32 72 Lesser Black-backed Gull Larus fuscus 448 95.52 73 Iceland Gull Larus glaucoides 158 33.69 74 Razorbill Alca torda 377 80.38 75 Common Guillemot Uria aalge 387 82.52 76 Red-throated Diver Gavia stellata 330 70.36 77 Fulmar Fulmarus glacialis 389 82.94 78 Gannet Morus bassanus 405 86.35 79 Cormorant Phalacrocorax carbo 457 97.44 80 Shag Gulosus aristotelis 370 78.89 81 Spoonbill Platalea leucorodia 335 71.43 82 Bittern Botaurus stellaris 294 62.69 83 Little Egret Egretta garzetta 444 94.67 84 Great White Egret Ardea alba 387 82.52 85 Grey Heron Ardea cinerea 454 96.80 86 Osprey Pandion haliaetus 294 62.69 87 Sparrowhawk Accipiter nisus 443 94.46 88 Marsh Harrier Circus aeruginosus 406 86.57 89 Hen Harrier Circus cyaneus 227 48.40 90 Red Kite Milvus milvus 434 92.54 91 White-tailed Eagle Haliaeetus albicilla 114 24.31 92 Buzzard Buteo buteo 457 97.44 93 Barn Owl Tyto alba 371 79.10 94 Little Owl Athene noctua 281 59.91 95 Long-eared Owl Asio otus 113 24.09 96 Short-eared Owl Asio flammeus 262 55.86 97 Tawny Owl Strix aluco 364 77.61 98 Kingfisher Alcedo atthis 410 87.42 99 Great Spotted Woodpecker Dendrocopos major 443 94.46 100 Green Woodpecker Picus viridis 395 84.22 101 Kestrel Falco tinnunculus 453 96.59 102 Merlin Falco columbarius 275 58.64 103 Hobby Falco subbuteo 347 73.99 104 Peregrine Falco peregrinus 421 89.77 105 Ring-necked Parakeet Psittacula krameri 290 61.83 106 Jay Garrulus glandarius 447 95.31 107 Magpie Pica pica 460 98.08 108 Jackdaw Coloeus monedula 459 97.87 109 Rook Corvus frugilegus 453 96.59 110 Carrion Crow Corvus corone 460 98.08 111 Raven Corvus corax 415 88.49 112 Coal Tit Periparus ater 446 95.10 113 Marsh Tit Poecile palustris 318 67.80 114 Willow Tit Poecile montanus 179 38.17 115 Blue Tit Cyanistes caeruleus 463 98.72 116 Great Tit Parus major 461 98.29 117 Skylark Alauda arvensis 440 93.82 118 Sand Martin Riparia riparia 426 90.83 119 Swallow Hirundo rustica 437 93.18 120 House Martin Delichon urbicum 432 92.11 121 Cetti's Warbler Cettia cetti 387 82.52 122 Long-tailed Tit Aegithalos caudatus 453 96.59 123 Willow Warbler Phylloscopus trochilus 415 88.49 124 Chiffchaff Phylloscopus collybita 441 94.03 125 Great Reed Warbler Acrocephalus arundinaceus 92 19.62 126 Sedge Warbler Acrocephalus schoenobaenus 413 88.06 127 Reed Warbler Acrocephalus scirpaceus 399 85.07 128 Grasshopper Warbler Locustella naevia 264 56.29 129 Blackcap Sylvia atricapilla 437 93.18 130 Garden Warbler Sylvia borin 343 73.13 131 Lesser Whitethroat Curruca curruca 332 70.79 132 Whitethroat Curruca communis 421 89.77 133 Goldcrest Regulus regulus 427 91.04 134 Wren Troglodytes troglodytes 458 97.65 135 Nuthatch Sitta europaea 431 91.90 136 Treecreeper Certhia familiaris 420 89.55 137 Northern Mockingbird Mimus polyglottos 132 28.14 138 Starling Sturnus vulgaris 458 97.65 139 Song Thrush Turdus philomelos 454 96.80 140 Mistle Thrush Turdus viscivorus 437 93.18 141 Redwing Turdus iliacus 443 94.46 142 Blackbird Turdus merula 462 98.51 143 Fieldfare Turdus pilaris 422 89.98 144 Robin Erithacus rubecula 462 98.51 145 Pied Flycatcher Ficedula hypoleuca 286 60.98 146 Black Redstart Phoenicurus ochruros 230 49.04 147 Whinchat Saxicola rubetra 302 64.39 148 Stonechat Saxicola rubicola 432 92.11 149 Wheatear Oenanthe oenanthe 409 87.21 150 Dipper Cinclus cinclus 289 61.62 151 Tree Sparrow Passer montanus 328 69.94 152 House Sparrow Passer domesticus 458 97.65 153 Dunnock Prunella modularis 462 98.51 154 Yellow Wagtail Motacilla flava 368 78.46 155 Grey Wagtail Motacilla cinerea 440 93.82 156 Pied Wagtail Motacilla alba 460 98.08 157 Meadow Pipit Anthus pratensis 434 92.54 158 Rock Pipit Anthus petrosus 372 79.32 159 Chaffinch Fringilla coelebs 457 97.44 160 Hawfinch Coccothraustes coccothraustes 170 36.25 161 Bullfinch Pyrrhula pyrrhula 429 91.47 162 Greenfinch Chloris chloris 453 96.59 163 Twite Linaria flavirostris 178 37.95 164 Linnet Linaria cannabina 437 93.18 165 Common Redpoll Acanthis flammea 79 16.84 166 Lesser Redpoll Acanthis cabaret 341 72.71 167 Common Crossbill Loxia curvirostra 263 56.08 168 Goldfinch Carduelis carduelis 454 96.80 169 Siskin Spinus spinus 414 88.27 170 Snow Bunting Plectrophenax nivalis 254 54.16 171 Yellowhammer Emberiza citrinella 407 86.78 172 Reed Bunting Emberiza schoeniclus 439 93.60