Anthony Wetherhill: Britain Year List 2023 BOU, All records: Top Blockers Record(s) 1 to 177 of 177 total.
Seq.	Species	Scientific Name	Seen By Other Listers	Other Listers (%)	
1	Canada Goose	Branta canadensis	487	98.19	
2	Barnacle Goose	Branta leucopsis	374	75.40	
3	Greylag Goose	Anser anser	481	96.98	
4	Pink-footed Goose	Anser brachyrhynchus	399	80.44	
5	White-fronted Goose	Anser albifrons	299	60.28	
6	Mute Swan	Cygnus olor	490	98.79	
7	Whooper Swan	Cygnus cygnus	386	77.82	
8	Egyptian Goose	Alopochen aegyptiaca	391	78.83	
9	Shelduck	Tadorna tadorna	477	96.17	
10	Shoveler	Spatula clypeata	468	94.35	
11	Gadwall	Mareca strepera	464	93.55	
12	Wigeon	Mareca penelope	472	95.16	
13	Mallard	Anas platyrhynchos	489	98.59	
14	Pintail	Anas acuta	435	87.70	
15	Teal	Anas crecca	478	96.37	
16	Pochard	Aythya ferina	455	91.73	
17	Ring-necked Duck	Aythya collaris	233	46.98	
18	Tufted Duck	Aythya fuligula	478	96.37	
19	Eider	Somateria mollissima	354	71.37	
20	Surf Scoter	Melanitta perspicillata	135	27.22	
21	Velvet Scoter	Melanitta fusca	257	51.81	
22	White-winged Scoter	Melanitta deglandi	71	14.31	
23	Stejneger's Scoter	Melanitta stejnegeri	78	15.73	
24	Common Scoter	Melanitta nigra	378	76.21	
25	Long-tailed Duck	Clangula hyemalis	283	57.06	
26	Goldeneye	Bucephala clangula	432	87.10	
27	Smew	Mergellus albellus	245	49.40	
28	Goosander	Mergus merganser	434	87.50	
29	Red-breasted Merganser	Mergus serrator	364	73.39	
30	Red Grouse	Lagopus lagopus	258	52.02	
31	Ptarmigan	Lagopus muta	30	6.05	
32	Black Grouse	Lyrurus tetrix	137	27.62	
33	Grey Partridge	Perdix perdix	314	63.31	
34	Pheasant	Phasianus colchicus	483	97.38	
35	Red-legged Partridge	Alectoris rufa	405	81.65	
36	Alpine Swift	Tachymarptis melba	179	36.09	
37	Swift	Apus apus	443	89.31	
38	Cuckoo	Cuculus canorus	389	78.43	
39	Rock Dove (Feral Pigeon)	Columba livia	417	84.07	
40	Stock Dove	Columba oenas	449	90.52	
41	Woodpigeon	Columba palumbus	490	98.79	
42	Collared Dove	Streptopelia decaocto	484	97.58	
43	Water Rail	Rallus aquaticus	383	77.22	
44	Moorhen	Gallinula chloropus	488	98.39	
45	Coot	Fulica atra	483	97.38	
46	Little Grebe	Tachybaptus ruficollis	466	93.95	
47	Red-necked Grebe	Podiceps grisegena	153	30.85	
48	Great Crested Grebe	Podiceps cristatus	467	94.15	
49	Slavonian Grebe	Podiceps auritus	229	46.17	
50	Oystercatcher	Haematopus ostralegus	471	94.96	
51	Grey Plover	Pluvialis squatarola	375	75.60	
52	Golden Plover	Pluvialis apricaria	421	84.88	
53	Ringed Plover	Charadrius hiaticula	443	89.31	
54	Lapwing	Vanellus vanellus	479	96.57	
55	Curlew	Numenius arquata	465	93.75	
56	Bar-tailed Godwit	Limosa lapponica	376	75.81	
57	Black-tailed Godwit	Limosa limosa	444	89.52	
58	Woodcock	Scolopax rusticola	321	64.72	
59	Snipe	Gallinago gallinago	446	89.92	
60	Common Sandpiper	Actitis hypoleucos	408	82.26	
61	Redshank	Tringa totanus	470	94.76	
62	Spotted Redshank	Tringa erythropus	300	60.48	
63	Greenshank	Tringa nebularia	375	75.60	
64	Turnstone	Arenaria interpres	433	87.30	
65	Knot	Calidris canutus	347	69.96	
66	Sanderling	Calidris alba	387	78.02	
67	Dunlin	Calidris alpina	452	91.13	
68	Purple Sandpiper	Calidris maritima	289	58.27	
69	Arctic Tern	Sterna paradisaea	271	54.64	
70	Common Tern	Sterna hirundo	406	81.85	
71	Sandwich Tern	Thalasseus sandvicensis	361	72.78	
72	Little Gull	Hydrocoloeus minutus	284	57.26	
73	Kittiwake	Rissa tridactyla	379	76.41	
74	Black-headed Gull	Chroicocephalus ridibundus	485	97.78	
75	Mediterranean Gull	Ichthyaetus melanocephalus	385	77.62	
76	Common Gull	Larus canus	461	92.94	
77	Herring Gull	Larus argentatus	483	97.38	
78	Great Black-backed Gull	Larus marinus	454	91.53	
79	Lesser Black-backed Gull	Larus fuscus	462	93.15	
80	Arctic Skua	Stercorarius parasiticus	261	52.62	
81	Pomarine Skua	Stercorarius pomarinus	91	18.35	
82	Great Skua	Stercorarius skua	185	37.30	
83	Black Guillemot	Cepphus grylle	195	39.31	
84	Razorbill	Alca torda	372	75.00	
85	Common Guillemot	Uria aalge	391	78.83	
86	Red-throated Diver	Gavia stellata	356	71.77	
87	Black-throated Diver	Gavia arctica	215	43.35	
88	Great Northern Diver	Gavia immer	328	66.13	
89	Storm Petrel	Hydrobates pelagicus	142	28.63	
90	Fulmar	Fulmarus glacialis	368	74.19	
91	Sooty Shearwater	Ardenna grisea	149	30.04	
92	Manx Shearwater	Puffinus puffinus	274	55.24	
93	Gannet	Morus bassanus	404	81.45	
94	Cormorant	Phalacrocorax carbo	485	97.78	
95	Shag	Gulosus aristotelis	393	79.23	
96	Little Egret	Egretta garzetta	473	95.36	
97	Grey Heron	Ardea cinerea	484	97.58	
98	Osprey	Pandion haliaetus	304	61.29	
99	Golden Eagle	Aquila chrysaetos	101	20.36	
100	Sparrowhawk	Accipiter nisus	469	94.56	
101	Red Kite	Milvus milvus	467	94.15	
102	White-tailed Eagle	Haliaeetus albicilla	164	33.06	
103	Buzzard	Buteo buteo	487	98.19	
104	Barn Owl	Tyto alba	413	83.27	
105	Long-eared Owl	Asio otus	203	40.93	
106	Short-eared Owl	Asio flammeus	310	62.50	
107	Tawny Owl	Strix aluco	385	77.62	
108	Kingfisher	Alcedo atthis	433	87.30	
109	Great Spotted Woodpecker	Dendrocopos major	467	94.15	
110	Kestrel	Falco tinnunculus	486	97.98	
111	Ring-necked Parakeet	Psittacula krameri	326	65.73	
112	Jay	Garrulus glandarius	470	94.76	
113	Magpie	Pica pica	490	98.79	
114	Jackdaw	Coloeus monedula	488	98.39	
115	Rook	Corvus frugilegus	476	95.97	
116	Carrion Crow	Corvus corone	489	98.59	
117	Hooded Crow	Corvus cornix	210	42.34	
118	Raven	Corvus corax	430	86.69	
119	Waxwing	Bombycilla garrulus	299	60.28	
120	Coal Tit	Periparus ater	468	94.35	
121	Crested Tit	Lophophanes cristatus	73	14.72	
122	Blue Tit	Cyanistes caeruleus	488	98.39	
123	Great Tit	Parus major	487	98.19	
124	Skylark	Alauda arvensis	469	94.56	
125	Sand Martin	Riparia riparia	443	89.31	
126	Swallow	Hirundo rustica	453	91.33	
127	House Martin	Delichon urbicum	444	89.52	
128	Cetti's Warbler	Cettia cetti	419	84.48	
129	Long-tailed Tit	Aegithalos caudatus	483	97.38	
130	Wood Warbler	Phylloscopus sibilatrix	177	35.69	
131	Willow Warbler	Phylloscopus trochilus	425	85.69	
132	Chiffchaff	Phylloscopus collybita	465	93.75	
133	Sedge Warbler	Acrocephalus schoenobaenus	411	82.86	
134	Grasshopper Warbler	Locustella naevia	235	47.38	
135	Blackcap	Sylvia atricapilla	457	92.14	
136	Garden Warbler	Sylvia borin	365	73.59	
137	Whitethroat	Curruca communis	428	86.29	
138	Goldcrest	Regulus regulus	458	92.34	
139	Wren	Troglodytes troglodytes	486	97.98	
140	Nuthatch	Sitta europaea	447	90.12	
141	Treecreeper	Certhia familiaris	438	88.31	
142	Starling	Sturnus vulgaris	487	98.19	
143	Song Thrush	Turdus philomelos	472	95.16	
144	Mistle Thrush	Turdus viscivorus	452	91.13	
145	Redwing	Turdus iliacus	466	93.95	
146	Blackbird	Turdus merula	490	98.79	
147	Fieldfare	Turdus pilaris	452	91.13	
148	Ring Ouzel	Turdus torquatus	240	48.39	
149	Spotted Flycatcher	Muscicapa striata	322	64.92	
150	Robin	Erithacus rubecula	485	97.78	
151	Redstart	Phoenicurus phoenicurus	313	63.10	
152	Whinchat	Saxicola rubetra	305	61.49	
153	Stonechat	Saxicola rubicola	459	92.54	
154	Wheatear	Oenanthe oenanthe	413	83.27	
155	Dipper	Cinclus cinclus	330	66.53	
156	Tree Sparrow	Passer montanus	329	66.33	
157	House Sparrow	Passer domesticus	488	98.39	
158	Dunnock	Prunella modularis	481	96.98	
159	Grey Wagtail	Motacilla cinerea	451	90.93	
160	Pied Wagtail	Motacilla alba	478	96.37	
161	Meadow Pipit	Anthus pratensis	467	94.15	
162	Tree Pipit	Anthus trivialis	286	57.66	
163	Water Pipit	Anthus spinoletta	205	41.33	
164	Rock Pipit	Anthus petrosus	381	76.81	
165	Chaffinch	Fringilla coelebs	484	97.58	
166	Brambling	Fringilla montifringilla	316	63.71	
167	Bullfinch	Pyrrhula pyrrhula	435	87.70	
168	Greenfinch	Chloris chloris	471	94.96	
169	Linnet	Linaria cannabina	458	92.34	
170	Common Redpoll	Acanthis flammea	121	24.40	
171	Lesser Redpoll	Acanthis cabaret	345	69.56	
172	Common Crossbill	Loxia curvirostra	239	48.19	
173	Goldfinch	Carduelis carduelis	486	97.98	
174	Siskin	Spinus spinus	425	85.69	
175	Snow Bunting	Plectrophenax nivalis	244	49.19	
176	Yellowhammer	Emberiza citrinella	421	84.88	
177	Reed Bunting	Emberiza schoeniclus	463	93.35