Luke Nelson: Britain, Ireland and Isle of Man Year List 2021 BOU/IRBC, All records: Top Blockers Record(s) 1 to 78 of 78 total.
Seq.	Species	Scientific Name	Seen By Other Listers	Other Listers (%)	
1	Canada Goose	Branta canadensis	19	82.61	
2	Greylag Goose	Anser anser	16	69.57	
3	Mute Swan	Cygnus olor	20	86.96	
4	Mandarin Duck	Aix galericulata	12	52.17	
5	Shoveler	Spatula clypeata	18	78.26	
6	Gadwall	Mareca strepera	19	82.61	
7	Wigeon	Mareca penelope	18	78.26	
8	Mallard	Anas platyrhynchos	19	82.61	
9	Teal	Anas crecca	18	78.26	
10	Pochard	Aythya ferina	16	69.57	
11	Tufted Duck	Aythya fuligula	19	82.61	
12	Goldeneye	Bucephala clangula	12	52.17	
13	Goosander	Mergus merganser	15	65.22	
14	Red Grouse	Lagopus lagopus	9	39.13	
15	Pheasant	Phasianus colchicus	21	91.30	
16	Rock Dove (Feral Pigeon)	Columba livia	15	65.22	
17	Stock Dove	Columba oenas	17	73.91	
18	Woodpigeon	Columba palumbus	20	86.96	
19	Collared Dove	Streptopelia decaocto	19	82.61	
20	Moorhen	Gallinula chloropus	19	82.61	
21	Coot	Fulica atra	19	82.61	
22	Little Grebe	Tachybaptus ruficollis	20	86.96	
23	Great Crested Grebe	Podiceps cristatus	18	78.26	
24	Golden Plover	Pluvialis apricaria	15	65.22	
25	Lapwing	Vanellus vanellus	18	78.26	
26	Black-headed Gull	Chroicocephalus ridibundus	20	86.96	
27	Herring Gull	Larus argentatus	20	86.96	
28	Great Black-backed Gull	Larus marinus	19	82.61	
29	Lesser Black-backed Gull	Larus fuscus	18	78.26	
30	Cormorant	Phalacrocorax carbo	19	82.61	
31	Grey Heron	Ardea cinerea	19	82.61	
32	Sparrowhawk	Accipiter nisus	19	82.61	
33	Buzzard	Buteo buteo	19	82.61	
34	Barn Owl	Tyto alba	9	39.13	
35	Tawny Owl	Strix aluco	14	60.87	
36	Kingfisher	Alcedo atthis	18	78.26	
37	Great Spotted Woodpecker	Dendrocopos major	19	82.61	
38	Kestrel	Falco tinnunculus	17	73.91	
39	Peregrine	Falco peregrinus	18	78.26	
40	Ring-necked Parakeet	Psittacula krameri	12	52.17	
41	Jay	Garrulus glandarius	19	82.61	
42	Magpie	Pica pica	20	86.96	
43	Jackdaw	Coloeus monedula	19	82.61	
44	Rook	Corvus frugilegus	20	86.96	
45	Carrion Crow	Corvus corone	19	82.61	
46	Raven	Corvus corax	18	78.26	
47	Coal Tit	Periparus ater	18	78.26	
48	Willow Tit	Poecile montanus	5	21.74	
49	Blue Tit	Cyanistes caeruleus	19	82.61	
50	Great Tit	Parus major	18	78.26	
51	Skylark	Alauda arvensis	17	73.91	
52	Long-tailed Tit	Aegithalos caudatus	19	82.61	
53	Goldcrest	Regulus regulus	18	78.26	
54	Wren	Troglodytes troglodytes	18	78.26	
55	Nuthatch	Sitta europaea	16	69.57	
56	Treecreeper	Certhia familiaris	15	65.22	
57	Starling	Sturnus vulgaris	20	86.96	
58	Song Thrush	Turdus philomelos	19	82.61	
59	Mistle Thrush	Turdus viscivorus	18	78.26	
60	Redwing	Turdus iliacus	18	78.26	
61	Blackbird	Turdus merula	19	82.61	
62	Fieldfare	Turdus pilaris	15	65.22	
63	Robin	Erithacus rubecula	17	73.91	
64	Stonechat	Saxicola rubicola	17	73.91	
65	Dipper	Cinclus cinclus	10	43.48	
66	House Sparrow	Passer domesticus	19	82.61	
67	Dunnock	Prunella modularis	19	82.61	
68	Grey Wagtail	Motacilla cinerea	17	73.91	
69	Pied Wagtail	Motacilla alba	17	73.91	
70	Meadow Pipit	Anthus pratensis	17	73.91	
71	Chaffinch	Fringilla coelebs	16	69.57	
72	Brambling	Fringilla montifringilla	8	34.78	
73	Bullfinch	Pyrrhula pyrrhula	17	73.91	
74	Greenfinch	Chloris chloris	17	73.91	
75	Lesser Redpoll	Acanthis cabaret	11	47.83	
76	Goldfinch	Carduelis carduelis	19	82.61	
77	Siskin	Spinus spinus	13	56.52	
78	Reed Bunting	Emberiza schoeniclus	15	65.22