Roy Scott: World Year List 2021 IOC, All records: Top Blockers Record(s) 1 to 92 of 92 total.
Seq.	Species	Scientific Name	Seen By Other Listers	Other Listers (%)	
1	Canada Goose	Branta canadensis	12	80.00	
2	Greylag Goose	Anser anser	10	66.67	
3	Mute Swan	Cygnus olor	11	73.33	
4	Common Shelduck	Tadorna tadorna	9	60.00	
5	Northern Shoveler	Spatula clypeata	12	80.00	
6	Gadwall	Mareca strepera	11	73.33	
7	Eurasian Wigeon	Mareca penelope	11	73.33	
8	Mallard	Anas platyrhynchos	12	80.00	
9	Northern Pintail	Anas acuta	11	73.33	
10	Eurasian Teal	Anas crecca	11	73.33	
11	Tufted Duck	Aythya fuligula	10	66.67	
12	Common Eider	Somateria mollissima	8	53.33	
13	Common Merganser	Mergus merganser	11	73.33	
14	Common Pheasant	Phasianus colchicus	10	66.67	
15	Red-legged Partridge	Alectoris rufa	8	53.33	
16	Common Swift	Apus apus	9	60.00	
17	Common Cuckoo	Cuculus canorus	7	46.67	
18	Rock Dove	Columba livia	11	73.33	
19	Common Wood Pigeon	Columba palumbus	10	66.67	
20	Eurasian Collared Dove	Streptopelia decaocto	10	66.67	
21	Common Moorhen	Gallinula chloropus	9	60.00	
22	Eurasian Coot	Fulica atra	10	66.67	
23	Little Grebe	Tachybaptus ruficollis	10	66.67	
24	Great Crested Grebe	Podiceps cristatus	10	66.67	
25	Black-necked Grebe	Podiceps nigricollis	9	60.00	
26	Eurasian Oystercatcher	Haematopus ostralegus	10	66.67	
27	Pied Avocet	Recurvirostra avosetta	10	66.67	
28	Grey Plover	Pluvialis squatarola	11	73.33	
29	European Golden Plover	Pluvialis apricaria	8	53.33	
30	Common Ringed Plover	Charadrius hiaticula	10	66.67	
31	Northern Lapwing	Vanellus vanellus	11	73.33	
32	Eurasian Curlew	Numenius arquata	10	66.67	
33	Black-tailed Godwit	Limosa limosa	9	60.00	
34	Common Redshank	Tringa totanus	10	66.67	
35	Lesser Yellowlegs	Tringa flavipes	6	40.00	
36	Ruff	Calidris pugnax	9	60.00	
37	Curlew Sandpiper	Calidris ferruginea	8	53.33	
38	Dunlin	Calidris alpina	12	80.00	
39	Little Stint	Calidris minuta	7	46.67	
40	Black-headed Gull	Chroicocephalus ridibundus	11	73.33	
41	Common Gull	Larus canus	8	53.33	
42	European Herring Gull	Larus argentatus	10	66.67	
43	Lesser Black-backed Gull	Larus fuscus	11	73.33	
44	Great Cormorant	Phalacrocorax carbo	11	73.33	
45	Little Egret	Egretta garzetta	11	73.33	
46	Grey Heron	Ardea cinerea	11	73.33	
47	Eurasian Sparrowhawk	Accipiter nisus	9	60.00	
48	Red Kite	Milvus milvus	10	66.67	
49	Common Buzzard	Buteo buteo	12	80.00	
50	Great Spotted Woodpecker	Dendrocopos major	10	66.67	
51	European Green Woodpecker	Picus viridis	10	66.67	
52	Common Kestrel	Falco tinnunculus	12	80.00	
53	Eurasian Jay	Garrulus glandarius	10	66.67	
54	Eurasian Magpie	Pica pica	12	80.00	
55	Red-billed Chough	Pyrrhocorax pyrrhocorax	4	26.67	
56	Western Jackdaw	Coloeus monedula	9	60.00	
57	Rook	Corvus frugilegus	9	60.00	
58	Carrion Crow	Corvus corone	11	73.33	
59	Hooded Crow	Corvus cornix	6	40.00	
60	Northern Raven	Corvus corax	11	73.33	
61	Coal Tit	Periparus ater	10	66.67	
62	Eurasian Blue Tit	Cyanistes caeruleus	11	73.33	
63	Great Tit	Parus major	11	73.33	
64	Eurasian Skylark	Alauda arvensis	9	60.00	
65	Barn Swallow	Hirundo rustica	12	80.00	
66	Western House Martin	Delichon urbicum	7	46.67	
67	Long-tailed Tit	Aegithalos caudatus	11	73.33	
68	Common Chiffchaff	Phylloscopus collybita	10	66.67	
69	Eurasian Blackcap	Sylvia atricapilla	9	60.00	
70	Eurasian Wren	Troglodytes troglodytes	9	60.00	
71	Eurasian Nuthatch	Sitta europaea	10	66.67	
72	Eurasian Treecreeper	Certhia familiaris	9	60.00	
73	Common Starling	Sturnus vulgaris	12	80.00	
74	Song Thrush	Turdus philomelos	10	66.67	
75	Mistle Thrush	Turdus viscivorus	9	60.00	
76	Redwing	Turdus iliacus	10	66.67	
77	Common Blackbird	Turdus merula	11	73.33	
78	Fieldfare	Turdus pilaris	9	60.00	
79	European Robin	Erithacus rubecula	11	73.33	
80	European Stonechat	Saxicola rubicola	10	66.67	
81	Northern Wheatear	Oenanthe oenanthe	6	40.00	
82	White-throated Dipper	Cinclus cinclus	7	46.67	
83	House Sparrow	Passer domesticus	14	93.33	
84	Dunnock	Prunella modularis	11	73.33	
85	Grey Wagtail	Motacilla cinerea	10	66.67	
86	White Wagtail	Motacilla alba	10	66.67	
87	Meadow Pipit	Anthus pratensis	9	60.00	
88	Eurasian Chaffinch	Fringilla coelebs	6	40.00	
89	European Greenfinch	Chloris chloris	10	66.67	
90	Common Linnet	Linaria cannabina	8	53.33	
91	European Goldfinch	Carduelis carduelis	11	73.33	
92	Common Reed Bunting	Emberiza schoeniclus	9	60.00