Daniel Newton: Britain, Ireland and Isle of Man Year List 2021 BOU/IRBC, All records: Top Blockers Record(s) 1 to 108 of 108 total.
Seq.	Species	Scientific Name	Seen By Other Listers	Other Listers (%)	
1	Brent Goose	Branta bernicla	14	60.87	
2	Greylag Goose	Anser anser	16	69.57	
3	Pink-footed Goose	Anser brachyrhynchus	12	52.17	
4	Mute Swan	Cygnus olor	20	86.96	
5	Shelduck	Tadorna tadorna	18	78.26	
6	Shoveler	Spatula clypeata	18	78.26	
7	Gadwall	Mareca strepera	19	82.61	
8	Wigeon	Mareca penelope	18	78.26	
9	Mallard	Anas platyrhynchos	19	82.61	
10	Pintail	Anas acuta	16	69.57	
11	Teal	Anas crecca	18	78.26	
12	Tufted Duck	Aythya fuligula	19	82.61	
13	Eider	Somateria mollissima	13	56.52	
14	Red-breasted Merganser	Mergus serrator	13	56.52	
15	Pheasant	Phasianus colchicus	21	91.30	
16	Swift	Apus apus	18	78.26	
17	Rock Dove (Feral Pigeon)	Columba livia	15	65.22	
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	Oystercatcher	Haematopus ostralegus	18	78.26	
25	Golden Plover	Pluvialis apricaria	15	65.22	
26	Ringed Plover	Charadrius hiaticula	15	65.22	
27	Lapwing	Vanellus vanellus	18	78.26	
28	Eurasian Whimbrel	Numenius phaeopus	13	56.52	
29	Curlew	Numenius arquata	19	82.61	
30	Bar-tailed Godwit	Limosa lapponica	14	60.87	
31	Black-tailed Godwit	Limosa limosa	15	65.22	
32	Common Snipe	Gallinago gallinago	16	69.57	
33	Common Sandpiper	Actitis hypoleucos	16	69.57	
34	Redshank	Tringa totanus	19	82.61	
35	Turnstone	Arenaria interpres	16	69.57	
36	Knot	Calidris canutus	11	47.83	
37	Ruff	Calidris pugnax	12	52.17	
38	Curlew Sandpiper	Calidris ferruginea	7	30.43	
39	Sanderling	Calidris alba	13	56.52	
40	Dunlin	Calidris alpina	16	69.57	
41	Little Stint	Calidris minuta	9	39.13	
42	Arctic Tern	Sterna paradisaea	10	43.48	
43	Common Tern	Sterna hirundo	16	69.57	
44	Sandwich Tern	Thalasseus sandvicensis	14	60.87	
45	Little Gull	Hydrocoloeus minutus	6	26.09	
46	Bonaparte's Gull	Chroicocephalus philadelphia	5	21.74	
47	Black-headed Gull	Chroicocephalus ridibundus	20	86.96	
48	Mediterranean Gull	Ichthyaetus melanocephalus	13	56.52	
49	Common Gull	Larus canus	17	73.91	
50	Herring Gull	Larus argentatus	20	86.96	
51	Great Black-backed Gull	Larus marinus	19	82.61	
52	Lesser Black-backed Gull	Larus fuscus	18	78.26	
53	Iceland Gull	Larus glaucoides	6	26.09	
54	Black Guillemot	Cepphus grylle	11	47.83	
55	Razorbill	Alca torda	17	73.91	
56	Manx Shearwater	Puffinus puffinus	7	30.43	
57	Gannet	Morus bassanus	17	73.91	
58	Cormorant	Phalacrocorax carbo	19	82.61	
59	Shag	Gulosus aristotelis	14	60.87	
60	Little Egret	Egretta garzetta	17	73.91	
61	Grey Heron	Ardea cinerea	19	82.61	
62	Sparrowhawk	Accipiter nisus	19	82.61	
63	Buzzard	Buteo buteo	19	82.61	
64	Kingfisher	Alcedo atthis	18	78.26	
65	Great Spotted Woodpecker	Dendrocopos major	19	82.61	
66	Kestrel	Falco tinnunculus	17	73.91	
67	Peregrine	Falco peregrinus	18	78.26	
68	Ring-necked Parakeet	Psittacula krameri	12	52.17	
69	Jay	Garrulus glandarius	19	82.61	
70	Magpie	Pica pica	20	86.96	
71	Jackdaw	Coloeus monedula	19	82.61	
72	Rook	Corvus frugilegus	20	86.96	
73	Hooded Crow	Corvus cornix	11	47.83	
74	Raven	Corvus corax	18	78.26	
75	Coal Tit	Periparus ater	18	78.26	
76	Blue Tit	Cyanistes caeruleus	19	82.61	
77	Great Tit	Parus major	18	78.26	
78	Skylark	Alauda arvensis	17	73.91	
79	Sand Martin	Riparia riparia	16	69.57	
80	Swallow	Hirundo rustica	18	78.26	
81	House Martin	Delichon urbicum	18	78.26	
82	Long-tailed Tit	Aegithalos caudatus	19	82.61	
83	Willow Warbler	Phylloscopus trochilus	14	60.87	
84	Chiffchaff	Phylloscopus collybita	16	69.57	
85	Sedge Warbler	Acrocephalus schoenobaenus	14	60.87	
86	Reed Warbler	Acrocephalus scirpaceus	14	60.87	
87	Blackcap	Sylvia atricapilla	17	73.91	
88	Wren	Troglodytes troglodytes	18	78.26	
89	Starling	Sturnus vulgaris	20	86.96	
90	Song Thrush	Turdus philomelos	19	82.61	
91	Mistle Thrush	Turdus viscivorus	18	78.26	
92	Redwing	Turdus iliacus	18	78.26	
93	Blackbird	Turdus merula	19	82.61	
94	Robin	Erithacus rubecula	17	73.91	
95	Stonechat	Saxicola rubicola	17	73.91	
96	Wheatear	Oenanthe oenanthe	13	56.52	
97	House Sparrow	Passer domesticus	19	82.61	
98	Dunnock	Prunella modularis	19	82.61	
99	Grey Wagtail	Motacilla cinerea	17	73.91	
100	Pied Wagtail	Motacilla alba	17	73.91	
101	Meadow Pipit	Anthus pratensis	17	73.91	
102	Tree Pipit	Anthus trivialis	8	34.78	
103	Chaffinch	Fringilla coelebs	16	69.57	
104	Bullfinch	Pyrrhula pyrrhula	17	73.91	
105	Greenfinch	Chloris chloris	17	73.91	
106	Linnet	Linaria cannabina	15	65.22	
107	Goldfinch	Carduelis carduelis	19	82.61	
108	Reed Bunting	Emberiza schoeniclus	15	65.22