Tomasz Zawadzki/ BIA / Blue-headed Wagtail (Motacilla flava) calling, Poland

Tomasz Zawadzki/ BIA / Great Reed-Warbler (Acrocephalus arundinaceus) calling, Poland

Tomasz Zawadzki/ BIA / Common Redstart (Phoenicurus phoenicurus) male, Poland

Tomasz Zawadzki/ BIA / Common Redstart (Phoenicurus phoenicurus) male, Poland

Tomasz Zawadzki/ BIA / Common Whitethroat (Sylvia communis) male calling, Poland

Tomasz Zawadzki/ BIA / Common Whitethroat (Sylvia communis) male, Poland

Tomasz Zawadzki/ BIA / Grey-headed Woodpecker (Picus canus) male, Poland

Tomasz Zawadzki/ BIA / Wood Nuthatch (Sitta europaea), Poland

Tomasz Zawadzki/ BIA / European Stonechat (Saxicola rubicola) male on Wild Teasel (Dipsacus fullonum), Poland

Tomasz Zawadzki/ BIA / Great Spotted Woodpecker (Dendrocopos major) male, Poland

Tomasz Zawadzki/ BIA / Red-backed Shrike (Lanius collurio), Poland

Tomasz Zawadzki/ BIA / Savi's Warbler (Locustella luscinioides) calling, Poland

Tomasz Zawadzki/ BIA / European Bee-eater (Merops apiaster) with wasp prey, Poland

Tomasz Zawadzki/ BIA / Kentish Plover (Charadrius alexandrinus), Fuerteventura, Spain

Tomasz Zawadzki/ BIA / Barbary Ground Squirrel (Atlantoxerus getulus) on alert, Fuerteventura, Spain

Tomasz Zawadzki/ BIA / Middle Spotted Woodpecker (Dendrocopos medius), Poland

Tomasz Zawadzki/ BIA / Common Greenshank (Tringa nebularia), Poland

Tomasz Zawadzki/ BIA / Common Redstart (Phoenicurus phoenicurus) male, Poland

Tomasz Zawadzki/ BIA / Common Redstart (Phoenicurus phoenicurus) male, Poland

Tomasz Zawadzki/ BIA / Blue-headed Wagtail (Motacilla flava) calling, Poland

Tomasz Zawadzki/ BIA / Great Reed-Warbler (Acrocephalus arundinaceus) calling, Poland

Tomasz Zawadzki/ BIA / European Stonechat (Saxicola rubicola) male on Wild Teasel (Dipsacus fullonum), Poland

Tomasz Zawadzki/ BIA / European Stonechat (Saxicola rubicola) male, Poland

Tomasz Zawadzki/ BIA / Wood Sandpiper (Tringa glareola) wading, Poland

Tomasz Zawadzki/ BIA / Common Snipe (Gallinago gallinago), Poland

Tomasz Zawadzki/ BIA / Ruff (Philomachus pugnax) female wading, Poland

Tomasz Zawadzki/ BIA / Western Marsh-Harrier (Circus aeruginosus), Poland

Tomasz Zawadzki/ BIA / Common Greenshank (Tringa nebularia) wading, Poland

Tomasz Zawadzki/ BIA / Wood Sandpiper (Tringa glareola), Poland

Tomasz Zawadzki/ BIA / Common Redstart (Phoenicurus phoenicurus) male, Poland

Tomasz Zawadzki/ BIA / Dunlin (Calidris alpina), Poland

Tomasz Zawadzki/ BIA / Reed Bunting (Emberiza schoeniclus) male calling, Poland

Tomasz Zawadzki/ BIA / Sand Martin (Riparia riparia), Poland

Tomasz Zawadzki/ BIA / Great Reed-Warbler (Acrocephalus arundinaceus) male calling, Poland

Tomasz Zawadzki/ BIA / Great Reed-Warbler (Acrocephalus arundinaceus) male calling, Poland

Tomasz Zawadzki/ BIA / Great Reed-Warbler (Acrocephalus arundinaceus) male calling, Poland

Tomasz Zawadzki/ BIA / Black-bellied Plover (Pluvialis squatarola), Poland

Tomasz Zawadzki/ BIA / Black-bellied Plover (Pluvialis squatarola), Poland

Tomasz Zawadzki/ BIA / Common Goldeneye (Bucephala clangula) female flapping wings, Poland

Tomasz Zawadzki/ BIA / Marsh Warbler (Acrocephalus palustris) male calling, Poland

Tomasz Zawadzki/ BIA / Crested Tit (Lophophanes cristatus), Poland

Tomasz Zawadzki/ BIA / Bar-tailed Godwit (Limosa lapponica) pair fighting, Poland

Tomasz Zawadzki/ BIA / Black Redstart (Phoenicurus ochruros) male, Poland

Tomasz Zawadzki/ BIA / Common Whitethroat (Sylvia communis) male calling, Poland

Tomasz Zawadzki/ BIA / Common Whitethroat (Sylvia communis) male calling, Poland

Tomasz Zawadzki/ BIA / Common Buzzard (Buteo buteo) during snowfall, Poland

Tomasz Zawadzki/ BIA / Grey-headed Woodpecker (Picus canus) male, Poland

Tomasz Zawadzki/ BIA / Wood Nuthatch (Sitta europaea), Poland