Angus Barnett: Britain Year List 2020 BOU, All records: Top Blockers Record(s) 1 to 103 of 103 total.
Seq.	Species	Scientific Name	Seen By Other Listers	Other Listers (%)	
1	Canada Goose	Branta canadensis	397	96.59	
2	Greylag Goose	Anser anser	390	94.89	
3	Mute Swan	Cygnus olor	399	97.08	
4	Egyptian Goose	Alopochen aegyptiaca	304	73.97	
5	Shelduck	Tadorna tadorna	382	92.94	
6	Mandarin Duck	Aix galericulata	250	60.83	
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	Tufted Duck	Aythya fuligula	395	96.11	
12	Eider	Somateria mollissima	253	61.56	
13	Pheasant	Phasianus colchicus	393	95.62	
14	Red-legged Partridge	Alectoris rufa	322	78.35	
15	Swift	Apus apus	352	85.64	
16	Cuckoo	Cuculus canorus	273	66.42	
17	Stock Dove	Columba oenas	362	88.08	
18	Woodpigeon	Columba palumbus	402	97.81	
19	Turtle Dove	Streptopelia turtur	137	33.33	
20	Collared Dove	Streptopelia decaocto	391	95.13	
21	Moorhen	Gallinula chloropus	397	96.59	
22	Coot	Fulica atra	396	96.35	
23	Little Grebe	Tachybaptus ruficollis	377	91.73	
24	Great Crested Grebe	Podiceps cristatus	378	91.97	
25	Oystercatcher	Haematopus ostralegus	380	92.46	
26	Avocet	Recurvirostra avosetta	313	76.16	
27	Lapwing	Vanellus vanellus	394	95.86	
28	Curlew	Numenius arquata	374	91.00	
29	Black-tailed Godwit	Limosa limosa	357	86.86	
30	Redshank	Tringa totanus	372	90.51	
31	Turnstone	Arenaria interpres	345	83.94	
32	Little Tern	Sternula albifrons	170	41.36	
33	Common Tern	Sterna hirundo	322	78.35	
34	Sandwich Tern	Thalasseus sandvicensis	284	69.10	
35	Black-headed Gull	Chroicocephalus ridibundus	394	95.86	
36	Mediterranean Gull	Ichthyaetus melanocephalus	310	75.43	
37	Common Gull	Larus canus	367	89.29	
38	Herring Gull	Larus argentatus	389	94.65	
39	Great Black-backed Gull	Larus marinus	374	91.00	
40	Lesser Black-backed Gull	Larus fuscus	374	91.00	
41	Cormorant	Phalacrocorax carbo	393	95.62	
42	Glossy Ibis	Plegadis falcinellus	115	27.98	
43	Bittern	Botaurus stellaris	164	39.90	
44	Little Egret	Egretta garzetta	388	94.40	
45	Grey Heron	Ardea cinerea	393	95.62	
46	Osprey	Pandion haliaetus	189	45.99	
47	Sparrowhawk	Accipiter nisus	384	93.43	
48	Marsh Harrier	Circus aeruginosus	349	84.91	
49	Red Kite	Milvus milvus	368	89.54	
50	Buzzard	Buteo buteo	391	95.13	
51	Barn Owl	Tyto alba	336	81.75	
52	Tawny Owl	Strix aluco	311	75.67	
53	Great Spotted Woodpecker	Dendrocopos major	382	92.94	
54	Green Woodpecker	Picus viridis	340	82.73	
55	Kestrel	Falco tinnunculus	394	95.86	
56	Jay	Garrulus glandarius	376	91.48	
57	Magpie	Pica pica	399	97.08	
58	Jackdaw	Coloeus monedula	393	95.62	
59	Rook	Corvus frugilegus	388	94.40	
60	Carrion Crow	Corvus corone	398	96.84	
61	Coal Tit	Periparus ater	387	94.16	
62	Blue Tit	Cyanistes caeruleus	398	96.84	
63	Great Tit	Parus major	398	96.84	
64	Skylark	Alauda arvensis	369	89.78	
65	Sand Martin	Riparia riparia	339	82.48	
66	Swallow	Hirundo rustica	368	89.54	
67	House Martin	Delichon urbicum	352	85.64	
68	Long-tailed Tit	Aegithalos caudatus	392	95.38	
69	Willow Warbler	Phylloscopus trochilus	333	81.02	
70	Chiffchaff	Phylloscopus collybita	373	90.75	
71	Iberian Chiffchaff	Phylloscopus ibericus	24	5.84	
72	Sedge Warbler	Acrocephalus schoenobaenus	312	75.91	
73	Reed Warbler	Acrocephalus scirpaceus	301	73.24	
74	Grasshopper Warbler	Locustella naevia	177	43.07	
75	Blackcap	Sylvia atricapilla	356	86.62	
76	Whitethroat	Curruca communis	333	81.02	
77	Goldcrest	Regulus regulus	368	89.54	
78	Wren	Troglodytes troglodytes	395	96.11	
79	Starling	Sturnus vulgaris	397	96.59	
80	Song Thrush	Turdus philomelos	389	94.65	
81	Redwing	Turdus iliacus	384	93.43	
82	Blackbird	Turdus merula	397	96.59	
83	Fieldfare	Turdus pilaris	361	87.83	
84	Ring Ouzel	Turdus torquatus	167	40.63	
85	Spotted Flycatcher	Muscicapa striata	271	65.94	
86	Robin	Erithacus rubecula	398	96.84	
87	Nightingale	Luscinia megarhynchos	110	26.76	
88	Redstart	Phoenicurus phoenicurus	247	60.10	
89	Stonechat	Saxicola rubicola	375	91.24	
90	Wheatear	Oenanthe oenanthe	314	76.40	
91	House Sparrow	Passer domesticus	396	96.35	
92	Dunnock	Prunella modularis	394	95.86	
93	Grey Wagtail	Motacilla cinerea	359	87.35	
94	Pied Wagtail	Motacilla alba	395	96.11	
95	Meadow Pipit	Anthus pratensis	373	90.75	
96	Chaffinch	Fringilla coelebs	397	96.59	
97	Bullfinch	Pyrrhula pyrrhula	369	89.78	
98	Greenfinch	Chloris chloris	377	91.73	
99	Linnet	Linaria cannabina	368	89.54	
100	Goldfinch	Carduelis carduelis	393	95.62	
101	Siskin	Spinus spinus	339	82.48	
102	Yellowhammer	Emberiza citrinella	349	84.91	
103	Reed Bunting	Emberiza schoeniclus	377	91.73