Alban Cassidy: Britain Year List 2023 BOU, All records: Top Blockers Record(s) 1 to 125 of 125 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	Bewick's Swan	Cygnus columbianus	258	52.02	
8	Whooper Swan	Cygnus cygnus	386	77.82	
9	Egyptian Goose	Alopochen aegyptiaca	391	78.83	
10	Shelduck	Tadorna tadorna	477	96.17	
11	Mandarin Duck	Aix galericulata	346	69.76	
12	Shoveler	Spatula clypeata	468	94.35	
13	Gadwall	Mareca strepera	464	93.55	
14	Wigeon	Mareca penelope	472	95.16	
15	Mallard	Anas platyrhynchos	489	98.59	
16	Pintail	Anas acuta	435	87.70	
17	Teal	Anas crecca	478	96.37	
18	Pochard	Aythya ferina	455	91.73	
19	Tufted Duck	Aythya fuligula	478	96.37	
20	Eider	Somateria mollissima	354	71.37	
21	Velvet Scoter	Melanitta fusca	257	51.81	
22	White-winged Scoter	Melanitta deglandi	71	14.31	
23	Common Scoter	Melanitta nigra	378	76.21	
24	Long-tailed Duck	Clangula hyemalis	283	57.06	
25	Goldeneye	Bucephala clangula	432	87.10	
26	Smew	Mergellus albellus	245	49.40	
27	Goosander	Mergus merganser	434	87.50	
28	Red-breasted Merganser	Mergus serrator	364	73.39	
29	Pheasant	Phasianus colchicus	483	97.38	
30	Red-legged Partridge	Alectoris rufa	405	81.65	
31	Rock Dove (Feral Pigeon)	Columba livia	417	84.07	
32	Stock Dove	Columba oenas	449	90.52	
33	Woodpigeon	Columba palumbus	490	98.79	
34	Collared Dove	Streptopelia decaocto	484	97.58	
35	Moorhen	Gallinula chloropus	488	98.39	
36	Coot	Fulica atra	483	97.38	
37	Little Grebe	Tachybaptus ruficollis	466	93.95	
38	Great Crested Grebe	Podiceps cristatus	467	94.15	
39	Slavonian Grebe	Podiceps auritus	229	46.17	
40	Oystercatcher	Haematopus ostralegus	471	94.96	
41	Grey Plover	Pluvialis squatarola	375	75.60	
42	Golden Plover	Pluvialis apricaria	421	84.88	
43	Ringed Plover	Charadrius hiaticula	443	89.31	
44	Lapwing	Vanellus vanellus	479	96.57	
45	Curlew	Numenius arquata	465	93.75	
46	Bar-tailed Godwit	Limosa lapponica	376	75.81	
47	Black-tailed Godwit	Limosa limosa	444	89.52	
48	Snipe	Gallinago gallinago	446	89.92	
49	Redshank	Tringa totanus	470	94.76	
50	Turnstone	Arenaria interpres	433	87.30	
51	Knot	Calidris canutus	347	69.96	
52	Ruff	Calidris pugnax	390	78.63	
53	Sanderling	Calidris alba	387	78.02	
54	Dunlin	Calidris alpina	452	91.13	
55	Black-headed Gull	Chroicocephalus ridibundus	485	97.78	
56	Common Gull	Larus canus	461	92.94	
57	Caspian Gull	Larus cachinnans	200	40.32	
58	Herring Gull	Larus argentatus	483	97.38	
59	Yellow-legged Gull	Larus michahellis	222	44.76	
60	Great Black-backed Gull	Larus marinus	454	91.53	
61	Lesser Black-backed Gull	Larus fuscus	462	93.15	
62	Red-throated Diver	Gavia stellata	356	71.77	
63	Cormorant	Phalacrocorax carbo	485	97.78	
64	Shag	Gulosus aristotelis	393	79.23	
65	Spoonbill	Platalea leucorodia	348	70.16	
66	Little Egret	Egretta garzetta	473	95.36	
67	Great White Egret	Ardea alba	428	86.29	
68	Grey Heron	Ardea cinerea	484	97.58	
69	Sparrowhawk	Accipiter nisus	469	94.56	
70	Marsh Harrier	Circus aeruginosus	440	88.71	
71	Hen Harrier	Circus cyaneus	319	64.31	
72	Red Kite	Milvus milvus	467	94.15	
73	Buzzard	Buteo buteo	487	98.19	
74	Barn Owl	Tyto alba	413	83.27	
75	Little Owl	Athene noctua	261	52.62	
76	Tawny Owl	Strix aluco	385	77.62	
77	Great Spotted Woodpecker	Dendrocopos major	467	94.15	
78	Kestrel	Falco tinnunculus	486	97.98	
79	Merlin	Falco columbarius	280	56.45	
80	Peregrine	Falco peregrinus	427	86.09	
81	Ring-necked Parakeet	Psittacula krameri	326	65.73	
82	Jay	Garrulus glandarius	470	94.76	
83	Magpie	Pica pica	490	98.79	
84	Jackdaw	Coloeus monedula	488	98.39	
85	Rook	Corvus frugilegus	476	95.97	
86	Carrion Crow	Corvus corone	489	98.59	
87	Raven	Corvus corax	430	86.69	
88	Waxwing	Bombycilla garrulus	299	60.28	
89	Coal Tit	Periparus ater	468	94.35	
90	Marsh Tit	Poecile palustris	335	67.54	
91	Blue Tit	Cyanistes caeruleus	488	98.39	
92	Great Tit	Parus major	487	98.19	
93	Skylark	Alauda arvensis	469	94.56	
94	Cetti's Warbler	Cettia cetti	419	84.48	
95	Long-tailed Tit	Aegithalos caudatus	483	97.38	
96	Blackcap	Sylvia atricapilla	457	92.14	
97	Goldcrest	Regulus regulus	458	92.34	
98	Wren	Troglodytes troglodytes	486	97.98	
99	Nuthatch	Sitta europaea	447	90.12	
100	Treecreeper	Certhia familiaris	438	88.31	
101	Starling	Sturnus vulgaris	487	98.19	
102	Song Thrush	Turdus philomelos	472	95.16	
103	Mistle Thrush	Turdus viscivorus	452	91.13	
104	Redwing	Turdus iliacus	466	93.95	
105	Blackbird	Turdus merula	490	98.79	
106	Fieldfare	Turdus pilaris	452	91.13	
107	Robin	Erithacus rubecula	485	97.78	
108	Black Redstart	Phoenicurus ochruros	245	49.40	
109	Stonechat	Saxicola rubicola	459	92.54	
110	Dipper	Cinclus cinclus	330	66.53	
111	Tree Sparrow	Passer montanus	329	66.33	
112	House Sparrow	Passer domesticus	488	98.39	
113	Dunnock	Prunella modularis	481	96.98	
114	Grey Wagtail	Motacilla cinerea	451	90.93	
115	Pied Wagtail	Motacilla alba	478	96.37	
116	Meadow Pipit	Anthus pratensis	467	94.15	
117	Chaffinch	Fringilla coelebs	484	97.58	
118	Bullfinch	Pyrrhula pyrrhula	435	87.70	
119	Greenfinch	Chloris chloris	471	94.96	
120	Linnet	Linaria cannabina	458	92.34	
121	Lesser Redpoll	Acanthis cabaret	345	69.56	
122	Goldfinch	Carduelis carduelis	486	97.98	
123	Siskin	Spinus spinus	425	85.69	
124	Yellowhammer	Emberiza citrinella	421	84.88	
125	Reed Bunting	Emberiza schoeniclus	463	93.35