Brian Thompson: Britain Year List 2021 BOU, All records: Top Blockers Record(s) 1 to 180 of 180 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 Tundra Bean Goose Anser serrirostris 83 17.70 4 White-fronted Goose Anser albifrons 238 50.75 5 Mute Swan Cygnus olor 461 98.29 6 Egyptian Goose Alopochen aegyptiaca 370 78.89 7 Shelduck Tadorna tadorna 441 94.03 8 Mandarin Duck Aix galericulata 310 66.10 9 Garganey Spatula querquedula 282 60.13 10 Shoveler Spatula clypeata 444 94.67 11 Gadwall Mareca strepera 442 94.24 12 Wigeon Mareca penelope 442 94.24 13 Mallard Anas platyrhynchos 461 98.29 14 Pintail Anas acuta 390 83.16 15 Teal Anas crecca 445 94.88 16 Green-winged Teal Anas carolinensis 74 15.78 17 Red-crested Pochard Netta rufina 170 36.25 18 Pochard Aythya ferina 426 90.83 19 Tufted Duck Aythya fuligula 457 97.44 20 Long-tailed Duck Clangula hyemalis 205 43.71 21 Goldeneye Bucephala clangula 383 81.66 22 Goosander Mergus merganser 390 83.16 23 Pheasant Phasianus colchicus 454 96.80 24 Swift Apus apus 430 91.68 25 Great Bustard Otis tarda 17 3.62 26 Cuckoo Cuculus canorus 382 81.45 27 Stock Dove Columba oenas 416 88.70 28 Woodpigeon Columba palumbus 463 98.72 29 Collared Dove Streptopelia decaocto 453 96.59 30 Water Rail Rallus aquaticus 353 75.27 31 Moorhen Gallinula chloropus 458 97.65 32 Coot Fulica atra 456 97.23 33 Little Grebe Tachybaptus ruficollis 443 94.46 34 Great Crested Grebe Podiceps cristatus 447 95.31 35 Slavonian Grebe Podiceps auritus 235 50.11 36 Black-necked Grebe Podiceps nigricollis 255 54.37 37 Oystercatcher Haematopus ostralegus 448 95.52 38 Black-winged Stilt Himantopus himantopus 82 17.48 39 Avocet Recurvirostra avosetta 394 84.01 40 American Golden Plover Pluvialis dominica 73 15.57 41 Dotterel Eudromias morinellus 109 23.24 42 Ringed Plover Charadrius hiaticula 399 85.07 43 Little Ringed Plover Charadrius dubius 360 76.76 44 Lapwing Vanellus vanellus 453 96.59 45 Eurasian Whimbrel Numenius phaeopus 349 74.41 46 Curlew Numenius arquata 436 92.96 47 Black-tailed Godwit Limosa limosa 411 87.63 48 Jack Snipe Lymnocryptes minimus 232 49.47 49 Woodcock Scolopax rusticola 291 62.05 50 Snipe Gallinago gallinago 413 88.06 51 Common Sandpiper Actitis hypoleucos 397 84.65 52 Green Sandpiper Tringa ochropus 351 74.84 53 Wood Sandpiper Tringa glareola 270 57.57 54 Redshank Tringa totanus 434 92.54 55 Spotted Redshank Tringa erythropus 331 70.58 56 Greenshank Tringa nebularia 382 81.45 57 Turnstone Arenaria interpres 411 87.63 58 Ruff Calidris pugnax 369 78.68 59 Curlew Sandpiper Calidris ferruginea 259 55.22 60 Sanderling Calidris alba 369 78.68 61 Dunlin Calidris alpina 418 89.13 62 Purple Sandpiper Calidris maritima 265 56.50 63 Little Stint Calidris minuta 290 61.83 64 Pectoral Sandpiper Calidris melanotos 177 37.74 65 Little Tern Sternula albifrons 286 60.98 66 Whiskered Tern Chlidonias hybrida 35 7.46 67 Black Tern Chlidonias niger 167 35.61 68 Arctic Tern Sterna paradisaea 290 61.83 69 Common Tern Sterna hirundo 407 86.78 70 Sandwich Tern Thalasseus sandvicensis 372 79.32 71 Little Gull Hydrocoloeus minutus 281 59.91 72 Kittiwake Rissa tridactyla 382 81.45 73 Sabine's Gull Xema sabini 38 8.10 74 Bonaparte's Gull Chroicocephalus philadelphia 107 22.81 75 Black-headed Gull Chroicocephalus ridibundus 460 98.08 76 Mediterranean Gull Ichthyaetus melanocephalus 366 78.04 77 Common Gull Larus canus 418 89.13 78 Herring Gull Larus argentatus 457 97.44 79 Yellow-legged Gull Larus michahellis 226 48.19 80 Great Black-backed Gull Larus marinus 433 92.32 81 Lesser Black-backed Gull Larus fuscus 448 95.52 82 Iceland Gull Larus glaucoides 158 33.69 83 Pomarine Skua Stercorarius pomarinus 81 17.27 84 Puffin Fratercula arctica 305 65.03 85 Razorbill Alca torda 377 80.38 86 Little Auk Alle alle 98 20.90 87 Common Guillemot Uria aalge 387 82.52 88 Pacific Diver Gavia pacifica 30 6.40 89 Fulmar Fulmarus glacialis 389 82.94 90 Gannet Morus bassanus 405 86.35 91 Cormorant Phalacrocorax carbo 457 97.44 92 Shag Gulosus aristotelis 370 78.89 93 Glossy Ibis Plegadis falcinellus 213 45.42 94 Spoonbill Platalea leucorodia 335 71.43 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 Marsh Harrier Circus aeruginosus 406 86.57 103 Red Kite Milvus milvus 434 92.54 104 Buzzard Buteo buteo 457 97.44 105 Little Owl Athene noctua 281 59.91 106 Roller Coracias garrulus 113 24.09 107 Kingfisher Alcedo atthis 410 87.42 108 Great Spotted Woodpecker Dendrocopos major 443 94.46 109 Green Woodpecker Picus viridis 395 84.22 110 Kestrel Falco tinnunculus 453 96.59 111 Red-footed Falcon Falco vespertinus 32 6.82 112 Hobby Falco subbuteo 347 73.99 113 Peregrine Falco peregrinus 421 89.77 114 Jay Garrulus glandarius 447 95.31 115 Magpie Pica pica 460 98.08 116 Jackdaw Coloeus monedula 459 97.87 117 Rook Corvus frugilegus 453 96.59 118 Carrion Crow Corvus corone 460 98.08 119 Raven Corvus corax 415 88.49 120 Coal Tit Periparus ater 446 95.10 121 Blue Tit Cyanistes caeruleus 463 98.72 122 Great Tit Parus major 461 98.29 123 Penduline Tit Remiz pendulinus 25 5.33 124 Bearded Tit Panurus biarmicus 299 63.75 125 Woodlark Lullula arborea 210 44.78 126 Skylark Alauda arvensis 440 93.82 127 Sand Martin Riparia riparia 426 90.83 128 Swallow Hirundo rustica 437 93.18 129 House Martin Delichon urbicum 432 92.11 130 Long-tailed Tit Aegithalos caudatus 453 96.59 131 Wood Warbler Phylloscopus sibilatrix 179 38.17 132 Willow Warbler Phylloscopus trochilus 415 88.49 133 Chiffchaff Phylloscopus collybita 441 94.03 134 Sedge Warbler Acrocephalus schoenobaenus 413 88.06 135 River Warbler Locustella fluviatilis 128 27.29 136 Blackcap Sylvia atricapilla 437 93.18 137 Garden Warbler Sylvia borin 343 73.13 138 Lesser Whitethroat Curruca curruca 332 70.79 139 Whitethroat Curruca communis 421 89.77 140 Dartford Warbler Curruca undata 184 39.23 141 Goldcrest Regulus regulus 427 91.04 142 Wren Troglodytes troglodytes 458 97.65 143 Nuthatch Sitta europaea 431 91.90 144 Treecreeper Certhia familiaris 420 89.55 145 Starling Sturnus vulgaris 458 97.65 146 Song Thrush Turdus philomelos 454 96.80 147 Mistle Thrush Turdus viscivorus 437 93.18 148 Redwing Turdus iliacus 443 94.46 149 Blackbird Turdus merula 462 98.51 150 Fieldfare Turdus pilaris 422 89.98 151 Ring Ouzel Turdus torquatus 261 55.65 152 Spotted Flycatcher Muscicapa striata 330 70.36 153 Robin Erithacus rubecula 462 98.51 154 Black Redstart Phoenicurus ochruros 230 49.04 155 Redstart Phoenicurus phoenicurus 335 71.43 156 Whinchat Saxicola rubetra 302 64.39 157 Stonechat Saxicola rubicola 432 92.11 158 Wheatear Oenanthe oenanthe 409 87.21 159 Tree Sparrow Passer montanus 328 69.94 160 House Sparrow Passer domesticus 458 97.65 161 Dunnock Prunella modularis 462 98.51 162 Yellow Wagtail Motacilla flava 368 78.46 163 Grey Wagtail Motacilla cinerea 440 93.82 164 Pied Wagtail Motacilla alba 460 98.08 165 Tawny Pipit Anthus campestris 14 2.99 166 Meadow Pipit Anthus pratensis 434 92.54 167 Tree Pipit Anthus trivialis 307 65.46 168 Rock Pipit Anthus petrosus 372 79.32 169 Chaffinch Fringilla coelebs 457 97.44 170 Bullfinch Pyrrhula pyrrhula 429 91.47 171 Greenfinch Chloris chloris 453 96.59 172 Linnet Linaria cannabina 437 93.18 173 Lesser Redpoll Acanthis cabaret 341 72.71 174 Goldfinch Carduelis carduelis 454 96.80 175 Siskin Spinus spinus 414 88.27 176 Cirl Bunting Emberiza cirlus 103 21.96 177 Little Bunting Emberiza pusilla 110 23.45 178 Rustic Bunting Emberiza rustica 54 11.51 179 Reed Bunting Emberiza schoeniclus 439 93.60 180 White-throated Sparrow Zonotrichia albicollis 63 13.43