Best photos of the month, May 2021.

Ruff | Olga Nemezhikova | 28

Hen Harrier | Nina Shteinbrenner | 23

Rufous-tailed Rock Thrush | Grigory Khasanov | 23

White's Thrush | Vladimir Maer | 22

Black-tailed Godwit | Olga Nemezhikova | 20

Spotted Redshank | Olga Nemezhikova | 20

Siberian Thrush | Grigory Khasanov | 19

Pallas's Sandgrouse | Denis Zhbir | 17

European Bee-eater | Vladimir Maer | 15

Siberian Jay | Grigory Khasanov | 15

Common Teal | Olga Nemezhikova | 15

Short-eared Owl | Dmitry Dubikovskiy | 14

Spotted Crake | Aleksey Bolshakov | 14

Willow Ptarmigan | Igor Dvurekov | 14

Baillon's Crake | Grigory Khasanov | 14

Oriental Cuckoo | Denis Voronov | 14

Grey Wagtail | Olga Nemezhikova | 14

Common Greenshank | Olga Nemezhikova | 14

Bluethroat | Vladimir Maer | 13

Common Crane | Vladimir Maer | 13

European Golden Oriole | Dmitry Dubikovskiy | 13

Pied Avocet | Denis Zhbir | 13

Mandarin Duck | Grigory Khasanov | 13

Azure Tit | Olga Nemezhikova | 13

Garganey | Olga Nemezhikova | 13

Lesser Kestrel | Vladimir Maer | 12

Thrush Nightingale | Dmitry Dubikovskiy | 12

Pied Wheatear | Denis Zhbir | 12

Rufous-tailed Rock Thrush | Denis Zhbir | 12

White-winged Snowfinch | Denis Zhbir | 12

Bluethroat | Denis Kazakov | 12

Common Kingfisher | Grigory Khasanov | 12

Eurasian Penduline Tit | Olga Nemezhikova | 12

Temminck's Stint | Olga Nemezhikova | 12

Tree Pipit | Olga Nemezhikova | 12

Guldenstadt's Redstart | Vladimir Maer | 11

Northern Black Grouse | Vladimir Maer | 11

Great Reed Warbler | Vladimir Maer | 11

Bearded Tit | Vladimir Maer | 11

Bar-headed Goose | Marina Borovskaya | 11

Rufous-tailed Rock Thrush | Denis Zhbir | 11

Willow Ptarmigan | Denis Zhbir | 11

Eurasian Whimbrel | Grigory Khasanov | 11

Citrine Wagtail | Olga Nemezhikova | 11

Green Sandpiper | Olga Nemezhikova | 11

Northern Pintail | Olga Nemezhikova | 11

Horned Lark | Vladimir Maer | 10

Steppe Eagle | Vladimir Maer | 10

Black Redstart | Vladimir Maer | 10

European Golden Oriole | Vladimir Maer | 10

Eurasian Roller | Vladimir Maer | 10

Slavonian Grebe | Dmitry Dubikovskiy | 10

Bluethroat | Yuriy Guzenko | 10

Ortolan Bunting | Denis Zhbir | 10

Bar-headed Goose | Denis Zhbir | 10

Rosy Starling | Denis Zhbir | 10

Brown Accentor | Denis Zhbir | 10

Bluethroat | Denis Kazakov | 10

Siberian Thrush | Grigory Khasanov | 10

Common Starling | Olga Nemezhikova | 10

Black-tailed Godwit | Olga Nemezhikova | 10

Water Pipit | Vladimir Maer | 9

Black Kite | Vladimir Maer | 9

Common Cuckoo | Vladimir Maer | 9

Northern Lapwing | Vladimir Maer | 9

Western Marsh-harrier | Vladimir Maer | 9

Greater Spotted Eagle | Vladimir Maer | 9

Ruff | Nina Shteinbrenner | 9

Western Grasshopper Warbler | Nina Shteinbrenner | 9

Merlin | Denis Zhbir | 9

Siberian Crane | Ivan Aianitov | 9

Eyebrowed Thrush | Grigory Khasanov | 9

Common Cuckoo | Denis Voronov | 9

Goosander | Olga Nemezhikova | 9

Marsh Sandpiper | Olga Nemezhikova | 9

Bluethroat | Olga Nemezhikova | 9

Curlew Sandpiper | Olga Nemezhikova | 9

Fieldfare | Olga Nemezhikova | 9

Great Grey Owl | Svetlana Vasilkova | 9

Ruff | Olga Nemezhikova | 9