Trudy Godfrey: Britain Year List 2021 BOU, All records: Top Blockers Record(s) 1 to 95 of 95 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	Barnacle Goose	Branta leucopsis	322	68.66	
4	Greylag Goose	Anser anser	449	95.74	
5	Pink-footed Goose	Anser brachyrhynchus	357	76.12	
6	Mute Swan	Cygnus olor	461	98.29	
7	Egyptian Goose	Alopochen aegyptiaca	370	78.89	
8	Shelduck	Tadorna tadorna	441	94.03	
9	Shoveler	Spatula clypeata	444	94.67	
10	Gadwall	Mareca strepera	442	94.24	
11	Wigeon	Mareca penelope	442	94.24	
12	Mallard	Anas platyrhynchos	461	98.29	
13	Tufted Duck	Aythya fuligula	457	97.44	
14	Grey Partridge	Perdix perdix	294	62.69	
15	Pheasant	Phasianus colchicus	454	96.80	
16	Red-legged Partridge	Alectoris rufa	400	85.29	
17	Swift	Apus apus	430	91.68	
18	Cuckoo	Cuculus canorus	382	81.45	
19	Woodpigeon	Columba palumbus	463	98.72	
20	Collared Dove	Streptopelia decaocto	453	96.59	
21	Moorhen	Gallinula chloropus	458	97.65	
22	Coot	Fulica atra	456	97.23	
23	Little Grebe	Tachybaptus ruficollis	443	94.46	
24	Great Crested Grebe	Podiceps cristatus	447	95.31	
25	Oystercatcher	Haematopus ostralegus	448	95.52	
26	Avocet	Recurvirostra avosetta	394	84.01	
27	Ringed Plover	Charadrius hiaticula	399	85.07	
28	Lapwing	Vanellus vanellus	453	96.59	
29	Curlew	Numenius arquata	436	92.96	
30	Black-tailed Godwit	Limosa limosa	411	87.63	
31	Redshank	Tringa totanus	434	92.54	
32	Turnstone	Arenaria interpres	411	87.63	
33	Ruff	Calidris pugnax	369	78.68	
34	Common Tern	Sterna hirundo	407	86.78	
35	Black-headed Gull	Chroicocephalus ridibundus	460	98.08	
36	Herring Gull	Larus argentatus	457	97.44	
37	Lesser Black-backed Gull	Larus fuscus	448	95.52	
38	Cormorant	Phalacrocorax carbo	457	97.44	
39	Glossy Ibis	Plegadis falcinellus	213	45.42	
40	Spoonbill	Platalea leucorodia	335	71.43	
41	Bittern	Botaurus stellaris	294	62.69	
42	Little Egret	Egretta garzetta	444	94.67	
43	Grey Heron	Ardea cinerea	454	96.80	
44	Osprey	Pandion haliaetus	294	62.69	
45	Sparrowhawk	Accipiter nisus	443	94.46	
46	Marsh Harrier	Circus aeruginosus	406	86.57	
47	Red Kite	Milvus milvus	434	92.54	
48	Buzzard	Buteo buteo	457	97.44	
49	Barn Owl	Tyto alba	371	79.10	
50	Roller	Coracias garrulus	113	24.09	
51	Great Spotted Woodpecker	Dendrocopos major	443	94.46	
52	Green Woodpecker	Picus viridis	395	84.22	
53	Kestrel	Falco tinnunculus	453	96.59	
54	Hobby	Falco subbuteo	347	73.99	
55	Jay	Garrulus glandarius	447	95.31	
56	Magpie	Pica pica	460	98.08	
57	Jackdaw	Coloeus monedula	459	97.87	
58	Rook	Corvus frugilegus	453	96.59	
59	Carrion Crow	Corvus corone	460	98.08	
60	Blue Tit	Cyanistes caeruleus	463	98.72	
61	Great Tit	Parus major	461	98.29	
62	Skylark	Alauda arvensis	440	93.82	
63	Shore Lark	Eremophila alpestris	122	26.01	
64	Sand Martin	Riparia riparia	426	90.83	
65	Swallow	Hirundo rustica	437	93.18	
66	House Martin	Delichon urbicum	432	92.11	
67	Long-tailed Tit	Aegithalos caudatus	453	96.59	
68	Willow Warbler	Phylloscopus trochilus	415	88.49	
69	Chiffchaff	Phylloscopus collybita	441	94.03	
70	Sedge Warbler	Acrocephalus schoenobaenus	413	88.06	
71	Grasshopper Warbler	Locustella naevia	264	56.29	
72	Blackcap	Sylvia atricapilla	437	93.18	
73	Whitethroat	Curruca communis	421	89.77	
74	Wren	Troglodytes troglodytes	458	97.65	
75	Starling	Sturnus vulgaris	458	97.65	
76	Song Thrush	Turdus philomelos	454	96.80	
77	Mistle Thrush	Turdus viscivorus	437	93.18	
78	Redwing	Turdus iliacus	443	94.46	
79	Blackbird	Turdus merula	462	98.51	
80	Fieldfare	Turdus pilaris	422	89.98	
81	Robin	Erithacus rubecula	462	98.51	
82	Stonechat	Saxicola rubicola	432	92.11	
83	Wheatear	Oenanthe oenanthe	409	87.21	
84	House Sparrow	Passer domesticus	458	97.65	
85	Dunnock	Prunella modularis	462	98.51	
86	Yellow Wagtail	Motacilla flava	368	78.46	
87	Pied Wagtail	Motacilla alba	460	98.08	
88	Meadow Pipit	Anthus pratensis	434	92.54	
89	Chaffinch	Fringilla coelebs	457	97.44	
90	Greenfinch	Chloris chloris	453	96.59	
91	Linnet	Linaria cannabina	437	93.18	
92	Goldfinch	Carduelis carduelis	454	96.80	
93	Snow Bunting	Plectrophenax nivalis	254	54.16	
94	Yellowhammer	Emberiza citrinella	407	86.78	
95	Reed Bunting	Emberiza schoeniclus	439	93.60