André Weiss: World Year List 2020 IOC, All records: Top Blockers Record(s) 1 to 181 of 181 total.
Seq.	Species	Scientific Name	Seen By Other Listers	Other Listers (%)	
1	Greylag Goose	Anser anser	7	46.67	
2	Tundra Bean Goose	Anser serrirostris	2	13.33	
3	Greater White-fronted Goose	Anser albifrons	5	33.33	
4	Mute Swan	Cygnus olor	8	53.33	
5	Egyptian Goose	Alopochen aegyptiaca	6	40.00	
6	Common Shelduck	Tadorna tadorna	7	46.67	
7	Ruddy Shelduck	Tadorna ferruginea	2	13.33	
8	Northern Shoveler	Spatula clypeata	8	53.33	
9	Gadwall	Mareca strepera	8	53.33	
10	Eurasian Wigeon	Mareca penelope	7	46.67	
11	Mallard	Anas platyrhynchos	9	60.00	
12	Northern Pintail	Anas acuta	7	46.67	
13	Eurasian Teal	Anas crecca	8	53.33	
14	Red-crested Pochard	Netta rufina	3	20.00	
15	Common Pochard	Aythya ferina	6	40.00	
16	Ferruginous Duck	Aythya nyroca	2	13.33	
17	Tufted Duck	Aythya fuligula	7	46.67	
18	Common Eider	Somateria mollissima	5	33.33	
19	Common Goldeneye	Bucephala clangula	8	53.33	
20	Smew	Mergellus albellus	4	26.67	
21	Common Merganser	Mergus merganser	7	46.67	
22	Red-breasted Merganser	Mergus serrator	6	40.00	
23	Rock Ptarmigan	Lagopus muta	1	6.67	
24	Black Grouse	Lyrurus tetrix	1	6.67	
25	Alpine Swift	Tachymarptis melba	1	6.67	
26	Common Swift	Apus apus	6	40.00	
27	Common Cuckoo	Cuculus canorus	4	26.67	
28	Rock Dove	Columba livia	11	73.33	
29	Stock Dove	Columba oenas	6	40.00	
30	Common Wood Pigeon	Columba palumbus	8	53.33	
31	Oriental Turtle Dove	Streptopelia orientalis	2	13.33	
32	Eurasian Collared Dove	Streptopelia decaocto	7	46.67	
33	Water Rail	Rallus aquaticus	3	20.00	
34	Common Moorhen	Gallinula chloropus	8	53.33	
35	Eurasian Coot	Fulica atra	9	60.00	
36	Western Swamphen	Porphyrio porphyrio	1	6.67	
37	Baillon's Crake	Zapornia pusilla	1	6.67	
38	Little Grebe	Tachybaptus ruficollis	9	60.00	
39	Great Crested Grebe	Podiceps cristatus	8	53.33	
40	Black-necked Grebe	Podiceps nigricollis	5	33.33	
41	Pied Avocet	Recurvirostra avosetta	6	40.00	
42	Little Ringed Plover	Charadrius dubius	3	20.00	
43	Northern Lapwing	Vanellus vanellus	7	46.67	
44	Eurasian Curlew	Numenius arquata	7	46.67	
45	Jack Snipe	Lymnocryptes minimus	1	6.67	
46	Common Snipe	Gallinago gallinago	7	46.67	
47	Common Sandpiper	Actitis hypoleucos	7	46.67	
48	Green Sandpiper	Tringa ochropus	7	46.67	
49	Wood Sandpiper	Tringa glareola	5	33.33	
50	Common Redshank	Tringa totanus	7	46.67	
51	Common Greenshank	Tringa nebularia	7	46.67	
52	Ruff	Calidris pugnax	7	46.67	
53	Common Tern	Sterna hirundo	7	46.67	
54	Black-headed Gull	Chroicocephalus ridibundus	8	53.33	
55	Mediterranean Gull	Ichthyaetus melanocephalus	6	40.00	
56	Common Gull	Larus canus	5	33.33	
57	Yellow-legged Gull	Larus michahellis	5	33.33	
58	Lesser Black-backed Gull	Larus fuscus	8	53.33	
59	White Stork	Ciconia ciconia	2	13.33	
60	Pygmy Cormorant	Microcarbo pygmaeus	2	13.33	
61	Great Cormorant	Phalacrocorax carbo	9	60.00	
62	Eurasian Bittern	Botaurus stellaris	3	20.00	
63	Little Bittern	Ixobrychus minutus	2	13.33	
64	Little Egret	Egretta garzetta	10	66.67	
65	Squacco Heron	Ardeola ralloides	4	26.67	
66	Western Cattle Egret	Bubulcus ibis	9	60.00	
67	Great Egret	Ardea alba	10	66.67	
68	Grey Heron	Ardea cinerea	10	66.67	
69	Purple Heron	Ardea purpurea	7	46.67	
70	Osprey	Pandion haliaetus	8	53.33	
71	Black-winged Kite	Elanus caeruleus	4	26.67	
72	Bearded Vulture	Gypaetus barbatus	3	20.00	
73	European Honey Buzzard	Pernis apivorus	3	20.00	
74	Griffon Vulture	Gyps fulvus	2	13.33	
75	Cinereous Vulture	Aegypius monachus	1	6.67	
76	Golden Eagle	Aquila chrysaetos	3	20.00	
77	Eurasian Sparrowhawk	Accipiter nisus	7	46.67	
78	Eurasian Goshawk	Accipiter gentilis	4	26.67	
79	Western Marsh Harrier	Circus aeruginosus	8	53.33	
80	Hen Harrier	Circus cyaneus	3	20.00	
81	Red Kite	Milvus milvus	8	53.33	
82	Black Kite	Milvus migrans	5	33.33	
83	Common Buzzard	Buteo buteo	8	53.33	
84	Western Barn Owl	Tyto alba	4	26.67	
85	Long-eared Owl	Asio otus	2	13.33	
86	Tawny Owl	Strix aluco	4	26.67	
87	Common Kingfisher	Alcedo atthis	6	40.00	
88	Middle Spotted Woodpecker	Dendrocoptes medius	2	13.33	
89	Lesser Spotted Woodpecker	Dryobates minor	3	20.00	
90	Great Spotted Woodpecker	Dendrocopos major	7	46.67	
91	Black Woodpecker	Dryocopus martius	2	13.33	
92	European Green Woodpecker	Picus viridis	7	46.67	
93	Common Kestrel	Falco tinnunculus	9	60.00	
94	Merlin	Falco columbarius	5	33.33	
95	Eurasian Hobby	Falco subbuteo	6	40.00	
96	Peregrine Falcon	Falco peregrinus	9	60.00	
97	Great Grey Shrike	Lanius excubitor	4	26.67	
98	Red-backed Shrike	Lanius collurio	4	26.67	
99	Eurasian Jay	Garrulus glandarius	8	53.33	
100	Eurasian Magpie	Pica pica	8	53.33	
101	Spotted Nutcracker	Nucifraga caryocatactes	2	13.33	
102	Alpine Chough	Pyrrhocorax graculus	2	13.33	
103	Western Jackdaw	Coloeus monedula	7	46.67	
104	Rook	Corvus frugilegus	7	46.67	
105	Carrion Crow	Corvus corone	8	53.33	
106	Hooded Crow	Corvus cornix	2	13.33	
107	Northern Raven	Corvus corax	9	60.00	
108	Coal Tit	Periparus ater	7	46.67	
109	Crested Tit	Lophophanes cristatus	2	13.33	
110	Marsh Tit	Poecile palustris	5	33.33	
111	Willow Tit	Poecile montanus	2	13.33	
112	Eurasian Blue Tit	Cyanistes caeruleus	9	60.00	
113	Great Tit	Parus major	8	53.33	
114	Bearded Reedling	Panurus biarmicus	6	40.00	
115	Woodlark	Lullula arborea	3	20.00	
116	Eurasian Skylark	Alauda arvensis	7	46.67	
117	Sand Martin	Riparia riparia	8	53.33	
118	Eurasian Crag Martin	Ptyonoprogne rupestris	2	13.33	
119	Barn Swallow	Hirundo rustica	11	73.33	
120	Western House Martin	Delichon urbicum	6	40.00	
121	Cetti's Warbler	Cettia cetti	7	46.67	
122	Long-tailed Tit	Aegithalos caudatus	7	46.67	
123	Western Bonelli's Warbler	Phylloscopus bonelli	2	13.33	
124	Willow Warbler	Phylloscopus trochilus	6	40.00	
125	Common Chiffchaff	Phylloscopus collybita	7	46.67	
126	Great Reed Warbler	Acrocephalus arundinaceus	1	6.67	
127	Common Reed Warbler	Acrocephalus scirpaceus	5	33.33	
128	Savi's Warbler	Locustella luscinioides	2	13.33	
129	Eurasian Blackcap	Sylvia atricapilla	7	46.67	
130	Garden Warbler	Sylvia borin	4	26.67	
131	Common Whitethroat	Curruca communis	5	33.33	
132	Common Firecrest	Regulus ignicapilla	5	33.33	
133	Goldcrest	Regulus regulus	6	40.00	
134	Eurasian Wren	Troglodytes troglodytes	7	46.67	
135	Eurasian Nuthatch	Sitta europaea	7	46.67	
136	Short-toed Treecreeper	Certhia brachydactyla	2	13.33	
137	Rosy Starling	Pastor roseus	2	13.33	
138	Common Starling	Sturnus vulgaris	9	60.00	
139	Song Thrush	Turdus philomelos	8	53.33	
140	Mistle Thrush	Turdus viscivorus	7	46.67	
141	Redwing	Turdus iliacus	7	46.67	
142	Common Blackbird	Turdus merula	9	60.00	
143	Fieldfare	Turdus pilaris	6	40.00	
144	Ring Ouzel	Turdus torquatus	2	13.33	
145	Spotted Flycatcher	Muscicapa striata	4	26.67	
146	European Robin	Erithacus rubecula	8	53.33	
147	Common Nightingale	Luscinia megarhynchos	1	6.67	
148	Bluethroat	Luscinia svecica	2	13.33	
149	European Pied Flycatcher	Ficedula hypoleuca	4	26.67	
150	Black Redstart	Phoenicurus ochruros	5	33.33	
151	Whinchat	Saxicola rubetra	5	33.33	
152	European Stonechat	Saxicola rubicola	7	46.67	
153	Northern Wheatear	Oenanthe oenanthe	6	40.00	
154	White-throated Dipper	Cinclus cinclus	4	26.67	
155	White-winged Snowfinch	Montifringilla nivalis	1	6.67	
156	Eurasian Tree Sparrow	Passer montanus	4	26.67	
157	Italian Sparrow	Passer italiae	1	6.67	
158	House Sparrow	Passer domesticus	12	80.00	
159	Alpine Accentor	Prunella collaris	1	6.67	
160	Dunnock	Prunella modularis	7	46.67	
161	Western Yellow Wagtail	Motacilla flava	5	33.33	
162	Grey Wagtail	Motacilla cinerea	7	46.67	
163	White Wagtail	Motacilla alba	9	60.00	
164	Meadow Pipit	Anthus pratensis	6	40.00	
165	Tree Pipit	Anthus trivialis	5	33.33	
166	Water Pipit	Anthus spinoletta	3	20.00	
167	Eurasian Chaffinch	Fringilla coelebs	5	33.33	
168	Brambling	Fringilla montifringilla	5	33.33	
169	Hawfinch	Coccothraustes coccothraustes	4	26.67	
170	Eurasian Bullfinch	Pyrrhula pyrrhula	7	46.67	
171	European Greenfinch	Chloris chloris	7	46.67	
172	Common Linnet	Linaria cannabina	6	40.00	
173	Lesser Redpoll	Acanthis cabaret	4	26.67	
174	Red Crossbill	Loxia curvirostra	4	26.67	
175	European Goldfinch	Carduelis carduelis	8	53.33	
176	European Serin	Serinus serinus	2	13.33	
177	Eurasian Siskin	Spinus spinus	6	40.00	
178	Yellowhammer	Emberiza citrinella	5	33.33	
179	Rock Bunting	Emberiza cia	1	6.67	
180	Cirl Bunting	Emberiza cirlus	2	13.33	
181	Common Reed Bunting	Emberiza schoeniclus	7	46.67