Aðalsteinn Örn Snæþórsson: Kelduhverfi Year List 2021 IOC, All records: Top Blockers Record(s) 1 to 84 of 84 total.
Seq.	Species	Scientific Name	Seen By Other Listers	Other Listers (%)	
1	Barnacle Goose	Branta leucopsis	1	100.00	
2	Greylag Goose	Anser anser	1	100.00	
3	Pink-footed Goose	Anser brachyrhynchus	1	100.00	
4	Whooper Swan	Cygnus cygnus	1	100.00	
5	Common Shelduck	Tadorna tadorna	1	100.00	
6	Northern Shoveler	Spatula clypeata	1	100.00	
7	Gadwall	Mareca strepera	1	100.00	
8	Eurasian Wigeon	Mareca penelope	1	100.00	
9	Mallard	Anas platyrhynchos	1	100.00	
10	Northern Pintail	Anas acuta	1	100.00	
11	Eurasian Teal	Anas crecca	1	100.00	
12	Ring-necked Duck	Aythya collaris	1	100.00	
13	Tufted Duck	Aythya fuligula	1	100.00	
14	Greater Scaup	Aythya marila	1	100.00	
15	Common Eider	Somateria mollissima	1	100.00	
16	Harlequin Duck	Histrionicus histrionicus	1	100.00	
17	Common Scoter	Melanitta nigra	1	100.00	
18	Long-tailed Duck	Clangula hyemalis	1	100.00	
19	Common Goldeneye	Bucephala clangula	1	100.00	
20	Barrow's Goldeneye	Bucephala islandica	1	100.00	
21	Smew	Mergellus albellus	1	100.00	
22	Common Merganser	Mergus merganser	1	100.00	
23	Red-breasted Merganser	Mergus serrator	1	100.00	
24	Rock Ptarmigan	Lagopus muta	1	100.00	
25	Common Wood Pigeon	Columba palumbus	1	100.00	
26	Water Rail	Rallus aquaticus	1	100.00	
27	Common Crane	Grus grus	1	100.00	
28	Horned Grebe	Podiceps auritus	1	100.00	
29	Eurasian Oystercatcher	Haematopus ostralegus	1	100.00	
30	European Golden Plover	Pluvialis apricaria	1	100.00	
31	Common Ringed Plover	Charadrius hiaticula	1	100.00	
32	Northern Lapwing	Vanellus vanellus	1	100.00	
33	Eurasian Whimbrel	Numenius phaeopus	1	100.00	
34	Black-tailed Godwit	Limosa limosa	1	100.00	
35	Jack Snipe	Lymnocryptes minimus	1	100.00	
36	Common Snipe	Gallinago gallinago	1	100.00	
37	Red-necked Phalarope	Phalaropus lobatus	1	100.00	
38	Common Redshank	Tringa totanus	1	100.00	
39	Ruddy Turnstone	Arenaria interpres	1	100.00	
40	Red Knot	Calidris canutus	1	100.00	
41	Sanderling	Calidris alba	1	100.00	
42	Dunlin	Calidris alpina	1	100.00	
43	Purple Sandpiper	Calidris maritima	1	100.00	
44	Black Tern	Chlidonias niger	1	100.00	
45	Arctic Tern	Sterna paradisaea	1	100.00	
46	Black-legged Kittiwake	Rissa tridactyla	1	100.00	
47	Black-headed Gull	Chroicocephalus ridibundus	1	100.00	
48	Common Gull	Larus canus	1	100.00	
49	European Herring Gull	Larus argentatus	1	100.00	
50	Great Black-backed Gull	Larus marinus	1	100.00	
51	Glaucous Gull	Larus hyperboreus	1	100.00	
52	Lesser Black-backed Gull	Larus fuscus	1	100.00	
53	Iceland Gull	Larus glaucoides	1	100.00	
54	Arctic Skua	Stercorarius parasiticus	1	100.00	
55	Great Skua	Stercorarius skua	1	100.00	
56	Atlantic Puffin	Fratercula arctica	1	100.00	
57	Black Guillemot	Cepphus grylle	1	100.00	
58	Razorbill	Alca torda	1	100.00	
59	Little Auk	Alle alle	1	100.00	
60	Common Murre	Uria aalge	1	100.00	
61	Red-throated Diver	Gavia stellata	1	100.00	
62	Great Northern Diver	Gavia immer	1	100.00	
63	Northern Fulmar	Fulmarus glacialis	1	100.00	
64	Northern Gannet	Morus bassanus	1	100.00	
65	Great Cormorant	Phalacrocorax carbo	1	100.00	
66	Grey Heron	Ardea cinerea	1	100.00	
67	Short-eared Owl	Asio flammeus	1	100.00	
68	Merlin	Falco columbarius	1	100.00	
69	Gyrfalcon	Falco rusticolus	1	100.00	
70	Northern Raven	Corvus corax	1	100.00	
71	Barn Swallow	Hirundo rustica	1	100.00	
72	Common Chiffchaff	Phylloscopus collybita	1	100.00	
73	Eurasian Blackcap	Sylvia atricapilla	1	100.00	
74	Eurasian Wren	Troglodytes troglodytes	1	100.00	
75	Common Starling	Sturnus vulgaris	1	100.00	
76	Redwing	Turdus iliacus	1	100.00	
77	Common Blackbird	Turdus merula	1	100.00	
78	Fieldfare	Turdus pilaris	1	100.00	
79	Northern Wheatear	Oenanthe oenanthe	1	100.00	
80	White Wagtail	Motacilla alba	1	100.00	
81	Meadow Pipit	Anthus pratensis	1	100.00	
82	Common Redpoll	Acanthis flammea	1	100.00	
83	Arctic Redpoll	Acanthis hornemanni	1	100.00	
84	Snow Bunting	Plectrophenax nivalis	1	100.00