Sam Lambert: Britain Year List 2020 BOU, All records: Top Blockers Record(s) 1 to 111 of 111 total.
Seq.	Species	Scientific Name	Seen By Other Listers	Other Listers (%)	
1	Brent Goose	Branta bernicla	317	77.13	
2	Canada Goose	Branta canadensis	397	96.59	
3	Greylag Goose	Anser anser	390	94.89	
4	Mute Swan	Cygnus olor	399	97.08	
5	Egyptian Goose	Alopochen aegyptiaca	304	73.97	
6	Shelduck	Tadorna tadorna	382	92.94	
7	Shoveler	Spatula clypeata	379	92.21	
8	Gadwall	Mareca strepera	381	92.70	
9	Wigeon	Mareca penelope	387	94.16	
10	Mallard	Anas platyrhynchos	401	97.57	
11	Pintail	Anas acuta	340	82.73	
12	Teal	Anas crecca	386	93.92	
13	Pochard	Aythya ferina	365	88.81	
14	Tufted Duck	Aythya fuligula	395	96.11	
15	Red-breasted Merganser	Mergus serrator	266	64.72	
16	Pheasant	Phasianus colchicus	393	95.62	
17	Red-legged Partridge	Alectoris rufa	322	78.35	
18	Swift	Apus apus	352	85.64	
19	Rock Dove (Feral Pigeon)	Columba livia	307	74.70	
20	Stock Dove	Columba oenas	362	88.08	
21	Woodpigeon	Columba palumbus	402	97.81	
22	Collared Dove	Streptopelia decaocto	391	95.13	
23	Moorhen	Gallinula chloropus	397	96.59	
24	Coot	Fulica atra	396	96.35	
25	Great Crested Grebe	Podiceps cristatus	378	91.97	
26	Slavonian Grebe	Podiceps auritus	184	44.77	
27	Black-necked Grebe	Podiceps nigricollis	207	50.36	
28	Oystercatcher	Haematopus ostralegus	380	92.46	
29	Ringed Plover	Charadrius hiaticula	334	81.27	
30	Little Ringed Plover	Charadrius dubius	252	61.31	
31	Lapwing	Vanellus vanellus	394	95.86	
32	Curlew	Numenius arquata	374	91.00	
33	Black-tailed Godwit	Limosa limosa	357	86.86	
34	Green Sandpiper	Tringa ochropus	288	70.07	
35	Redshank	Tringa totanus	372	90.51	
36	Turnstone	Arenaria interpres	345	83.94	
37	Sanderling	Calidris alba	298	72.51	
38	Dunlin	Calidris alpina	357	86.86	
39	Little Tern	Sternula albifrons	170	41.36	
40	Arctic Tern	Sterna paradisaea	167	40.63	
41	Common Tern	Sterna hirundo	322	78.35	
42	Black-headed Gull	Chroicocephalus ridibundus	394	95.86	
43	Mediterranean Gull	Ichthyaetus melanocephalus	310	75.43	
44	Common Gull	Larus canus	367	89.29	
45	Herring Gull	Larus argentatus	389	94.65	
46	Great Black-backed Gull	Larus marinus	374	91.00	
47	Lesser Black-backed Gull	Larus fuscus	374	91.00	
48	Great Northern Diver	Gavia immer	231	56.20	
49	Gannet	Morus bassanus	318	77.37	
50	Cormorant	Phalacrocorax carbo	393	95.62	
51	Little Egret	Egretta garzetta	388	94.40	
52	Grey Heron	Ardea cinerea	393	95.62	
53	Sparrowhawk	Accipiter nisus	384	93.43	
54	Marsh Harrier	Circus aeruginosus	349	84.91	
55	Red Kite	Milvus milvus	368	89.54	
56	Buzzard	Buteo buteo	391	95.13	
57	Great Spotted Woodpecker	Dendrocopos major	382	92.94	
58	Green Woodpecker	Picus viridis	340	82.73	
59	Kestrel	Falco tinnunculus	394	95.86	
60	Peregrine	Falco peregrinus	346	84.18	
61	Ring-necked Parakeet	Psittacula krameri	234	56.93	
62	Jay	Garrulus glandarius	376	91.48	
63	Magpie	Pica pica	399	97.08	
64	Jackdaw	Coloeus monedula	393	95.62	
65	Rook	Corvus frugilegus	388	94.40	
66	Carrion Crow	Corvus corone	398	96.84	
67	Raven	Corvus corax	341	82.97	
68	Coal Tit	Periparus ater	387	94.16	
69	Marsh Tit	Poecile palustris	282	68.61	
70	Blue Tit	Cyanistes caeruleus	398	96.84	
71	Great Tit	Parus major	398	96.84	
72	Skylark	Alauda arvensis	369	89.78	
73	Sand Martin	Riparia riparia	339	82.48	
74	Swallow	Hirundo rustica	368	89.54	
75	House Martin	Delichon urbicum	352	85.64	
76	Long-tailed Tit	Aegithalos caudatus	392	95.38	
77	Willow Warbler	Phylloscopus trochilus	333	81.02	
78	Chiffchaff	Phylloscopus collybita	373	90.75	
79	Reed Warbler	Acrocephalus scirpaceus	301	73.24	
80	Blackcap	Sylvia atricapilla	356	86.62	
81	Garden Warbler	Sylvia borin	260	63.26	
82	Lesser Whitethroat	Curruca curruca	265	64.48	
83	Whitethroat	Curruca communis	333	81.02	
84	Dartford Warbler	Curruca undata	136	33.09	
85	Goldcrest	Regulus regulus	368	89.54	
86	Wren	Troglodytes troglodytes	395	96.11	
87	Nuthatch	Sitta europaea	369	89.78	
88	Starling	Sturnus vulgaris	397	96.59	
89	Song Thrush	Turdus philomelos	389	94.65	
90	Mistle Thrush	Turdus viscivorus	369	89.78	
91	Redwing	Turdus iliacus	384	93.43	
92	Blackbird	Turdus merula	397	96.59	
93	Fieldfare	Turdus pilaris	361	87.83	
94	Robin	Erithacus rubecula	398	96.84	
95	Redstart	Phoenicurus phoenicurus	247	60.10	
96	Stonechat	Saxicola rubicola	375	91.24	
97	Wheatear	Oenanthe oenanthe	314	76.40	
98	House Sparrow	Passer domesticus	396	96.35	
99	Dunnock	Prunella modularis	394	95.86	
100	Pied Wagtail	Motacilla alba	395	96.11	
101	Meadow Pipit	Anthus pratensis	373	90.75	
102	Rock Pipit	Anthus petrosus	290	70.56	
103	Chaffinch	Fringilla coelebs	397	96.59	
104	Bullfinch	Pyrrhula pyrrhula	369	89.78	
105	Greenfinch	Chloris chloris	377	91.73	
106	Linnet	Linaria cannabina	368	89.54	
107	Goldfinch	Carduelis carduelis	393	95.62	
108	Siskin	Spinus spinus	339	82.48	
109	Corn Bunting	Emberiza calandra	216	52.55	
110	Yellowhammer	Emberiza citrinella	349	84.91	
111	Reed Bunting	Emberiza schoeniclus	377	91.73