Best photos of the month, May 2021.

Eurasian Roller | Dmitriy Shevtsov | 20

Rufous-tailed Rock Thrush | Vladimir Maer | 19

Booted Eagle | Anna Golubeva | 18

Common Kestrel | Elena Shvydun | 17

Hen Harrier | Nina Shteinbrenner | 16

European Bee-eater | Khasan Zhurtov | 15

Common Sandpiper | Elena Shvydun | 15

Glossy Ibis | Svetlana Medvedeva | 14

Thrush Nightingale | Elena Shvydun | 14

Common Oystercatcher | Dmitriy Shevtsov | 13

Savi's Warbler | Andrei Kiselev | 13

Western Marsh-Harrier | Khasan Zhurtov | 13

Smew | Dmitry Pozharsky | 13

Savi's Warbler | Andrei Kiselev | 12

Eurasian Wryneck | Andrei Kiselev | 12

Garganey | Andrei Kiselev | 12

Common Oystercatcher | Andrei Kiselev | 12

Little Ringed Plover | Khasan Zhurtov | 12

Purple Heron | Svetlana Medvedeva | 12

Grey Wagtail | Olga Nemezhikova | 12

Black-winged Stilt | Andrey Vyalkov | 11

Common Tern | Andrei Kiselev | 11

Little Stint | Khasan Zhurtov | 11

Sharp-tailed Sandpiper | Alexander Rogal' | 11

Eurasian Wryneck | Andrey Semenov | 11

Lesser Whitethroat | Elena Shvydun | 11

Pied Wheatear | Denis Zhbir | 11

Pied Avocet | Denis Zhbir | 11

Bluethroat | Denis Kazakov | 11

Eurasian Wryneck | Andrey Semenov | 11

Pacific Golden Plover | Andrey Vyalkov | 10

Bluethroat | Andrei Kiselev | 10

Japanese Reed Bunting | Alexander Rogal' | 10

Black-crowned Night Heron | Svetlana Medvedeva | 10

Common Whitethroat | Svetlana Medvedeva | 10

Northern Parrotbill | Andrey Vyalkov | 9

Little Ringed Plover | Andrei Kiselev | 9

Great Crested Grebe | Khasan Zhurtov | 9

Booted Eagle | Khasan Zhurtov | 9

Black Stork | Khasan Zhurtov | 9

Far Eastern Curlew | Alexander Rogal' | 9

Yellow Wagtail | Dmitry Pozharsky | 9

Grey-Headed Woodpecker | Andrey Semenov | 9

Squacco Heron | Svetlana Medvedeva | 9

Little Bittern | Aleksandr Breykin | 9

Hawfinch | Dmitry Osipov | 9

Bluethroat | Denis Kazakov | 9