Markus Varesvuo / Black grouse (lyrurus tetrix) female and chick at nest, Vaala, Finland, June.

Markus Varesvuo / Spotted Redshank (Tringa erythopus) foraging, with head submerged in water, Summer plumage Loviisa, Finland

Markus Varesvuo / Brunnich´s guillemot (Uria lomvia) in flight, summer plumage, Norway July 2004

Markus Varesvuo / Temminck's Stint (Calidris temminckii), adult with summer plumage in flight. Norway. June.

Steve Knell / Bearded tit (Panurus biarmicus) male in summer plumage. Hungary, May

Fergus Gill / 2020VISION / Sanderling (Calidris alba) in breeding plumage, standing on shoreline, Outer Hebrides, Scotland, UK, June.

Fergus Gill / 2020VISION / Ptarmigan (Lagopus mutus) hen in summer plumage behind rocks. Cairngorms National Park, Scotland, July.

Mark Hamblin / 2020VISION / Adult male Dunlin (Calidris alpina) in summer plumage calling on moorland, Scotland, UK, June

Chris Gomersall / 2020VISION / Portrait of adult Atlantic puffin (Fratercula arctica) in summer plumage, Isle of Lunga, Inner Hebrides, Scotland, UK, July 2011

David Tipling / Wood sandpiper {Tringa glareola} perched, summer plumage, Greece

Andrew Parkinson / Great Skua (Stercorarius skua) territorial adult displaying to other Skuas passing overhead by stretching out its wings and calling. Shetland Islands, Scotland, UK, June. (non-ex)

Steve Knell / Long-tailed duck (Clangula hyemalis) male in summer plumage, taking off from river, Iceland, May