David Beckerton: Wales Life List BOU, All records: Top Blockers Record(s) 1 to 102 of 102 total.
Seq.	Species	Scientific Name	Seen By Other Listers	Other Listers (%)	
1	Canada Goose	Branta canadensis	64	94.12	
2	Mute Swan	Cygnus olor	65	95.59	
3	Shelduck	Tadorna tadorna	61	89.71	
4	Shoveler	Spatula clypeata	61	89.71	
5	Gadwall	Mareca strepera	57	83.82	
6	Wigeon	Mareca penelope	60	88.24	
7	Mallard	Anas platyrhynchos	67	98.53	
8	Teal	Anas crecca	59	86.76	
9	Common Scoter	Melanitta nigra	57	83.82	
10	Goosander	Mergus merganser	54	79.41	
11	Red-breasted Merganser	Mergus serrator	53	77.94	
12	Pheasant	Phasianus colchicus	63	92.65	
13	Swift	Apus apus	59	86.76	
14	Rock Dove (Feral Pigeon)	Columba livia	58	85.29	
15	Stock Dove	Columba oenas	51	75.00	
16	Woodpigeon	Columba palumbus	65	95.59	
17	Collared Dove	Streptopelia decaocto	62	91.18	
18	Moorhen	Gallinula chloropus	65	95.59	
19	Coot	Fulica atra	64	94.12	
20	Little Grebe	Tachybaptus ruficollis	61	89.71	
21	Great Crested Grebe	Podiceps cristatus	59	86.76	
22	Oystercatcher	Haematopus ostralegus	65	95.59	
23	Grey Plover	Pluvialis squatarola	52	76.47	
24	Golden Plover	Pluvialis apricaria	51	75.00	
25	Ringed Plover	Charadrius hiaticula	59	86.76	
26	Curlew	Numenius arquata	64	94.12	
27	Snipe	Gallinago gallinago	57	83.82	
28	Common Sandpiper	Actitis hypoleucos	56	82.35	
29	Redshank	Tringa totanus	63	92.65	
30	Turnstone	Arenaria interpres	56	82.35	
31	Dunlin	Calidris alpina	58	85.29	
32	Common Tern	Sterna hirundo	51	75.00	
33	Sandwich Tern	Thalasseus sandvicensis	53	77.94	
34	Black-headed Gull	Chroicocephalus ridibundus	66	97.06	
35	Common Gull	Larus canus	56	82.35	
36	Herring Gull	Larus argentatus	66	97.06	
37	Great Black-backed Gull	Larus marinus	64	94.12	
38	Lesser Black-backed Gull	Larus fuscus	64	94.12	
39	Puffin	Fratercula arctica	54	79.41	
40	Black Guillemot	Cepphus grylle	44	64.71	
41	Common Guillemot	Uria aalge	60	88.24	
42	Fulmar	Fulmarus glacialis	56	82.35	
43	Gannet	Morus bassanus	57	83.82	
44	Cormorant	Phalacrocorax carbo	67	98.53	
45	Shag	Gulosus aristotelis	60	88.24	
46	Little Egret	Egretta garzetta	63	92.65	
47	Grey Heron	Ardea cinerea	66	97.06	
48	Sparrowhawk	Accipiter nisus	59	86.76	
49	Hen Harrier	Circus cyaneus	47	69.12	
50	Red Kite	Milvus milvus	63	92.65	
51	Buzzard	Buteo buteo	65	95.59	
52	Kingfisher	Alcedo atthis	56	82.35	
53	Great Spotted Woodpecker	Dendrocopos major	58	85.29	
54	Green Woodpecker	Picus viridis	50	73.53	
55	Kestrel	Falco tinnunculus	62	91.18	
56	Jay	Garrulus glandarius	59	86.76	
57	Magpie	Pica pica	67	98.53	
58	Chough	Pyrrhocorax pyrrhocorax	61	89.71	
59	Jackdaw	Coloeus monedula	66	97.06	
60	Rook	Corvus frugilegus	63	92.65	
61	Carrion Crow	Corvus corone	66	97.06	
62	Raven	Corvus corax	65	95.59	
63	Coal Tit	Periparus ater	61	89.71	
64	Blue Tit	Cyanistes caeruleus	66	97.06	
65	Great Tit	Parus major	64	94.12	
66	Skylark	Alauda arvensis	60	88.24	
67	Sand Martin	Riparia riparia	53	77.94	
68	Swallow	Hirundo rustica	64	94.12	
69	House Martin	Delichon urbicum	63	92.65	
70	Long-tailed Tit	Aegithalos caudatus	59	86.76	
71	Willow Warbler	Phylloscopus trochilus	58	85.29	
72	Chiffchaff	Phylloscopus collybita	63	92.65	
73	Blackcap	Sylvia atricapilla	56	82.35	
74	Whitethroat	Curruca communis	61	89.71	
75	Goldcrest	Regulus regulus	59	86.76	
76	Wren	Troglodytes troglodytes	66	97.06	
77	Nuthatch	Sitta europaea	60	88.24	
78	Treecreeper	Certhia familiaris	59	86.76	
79	Starling	Sturnus vulgaris	65	95.59	
80	Song Thrush	Turdus philomelos	60	88.24	
81	Mistle Thrush	Turdus viscivorus	57	83.82	
82	Redwing	Turdus iliacus	54	79.41	
83	Blackbird	Turdus merula	67	98.53	
84	Robin	Erithacus rubecula	67	98.53	
85	Stonechat	Saxicola rubicola	64	94.12	
86	Wheatear	Oenanthe oenanthe	61	89.71	
87	Dipper	Cinclus cinclus	59	86.76	
88	House Sparrow	Passer domesticus	67	98.53	
89	Dunnock	Prunella modularis	66	97.06	
90	Grey Wagtail	Motacilla cinerea	60	88.24	
91	Pied Wagtail	Motacilla alba	63	92.65	
92	Meadow Pipit	Anthus pratensis	65	95.59	
93	Rock Pipit	Anthus petrosus	60	88.24	
94	Chaffinch	Fringilla coelebs	66	97.06	
95	Brambling	Fringilla montifringilla	46	67.65	
96	Bullfinch	Pyrrhula pyrrhula	61	89.71	
97	Greenfinch	Chloris chloris	63	92.65	
98	Linnet	Linaria cannabina	62	91.18	
99	Goldfinch	Carduelis carduelis	67	98.53	
100	Siskin	Spinus spinus	59	86.76	
101	Yellowhammer	Emberiza citrinella	54	79.41	
102	Reed Bunting	Emberiza schoeniclus	61	89.71