Fabio Pupin / Meadow viper, (Vipera ursinii), basking in alpine meadow, Apennines, Italy, September . Non-ex.

Sven Zacek / Meandering Loobu River with surrounding meadows and woodlands, aerial view. Lahemaa National Park in Northern Estonia in Laane-Virumaa, Estonia. May 2017.

Guy Edwardes / Hawes, Wensleydale, Yorkshire Dales National Park, North Yorkshire, England, UK. June.

Clay Bolt / Central bumble bee (Bombus centralis) pollinating wildflowers in the Bridger Range, Bozeman, Montana. August.

Alex Hyde / Fragrant Orchid (Gymnadenia conopsea) and Yellow Rattle (Rhinanthus sp.) flowering in ancient alpine hay meadow. Nordtirol, Austrian Alps. June.

Andres M. Dominguez / Orchid (Orchis langei) in sunset light, Sierra de Grazalema Natural Park, southern Spain, May.

Andres M. Dominguez / Heart shaped lip dactylorhiza orchid (Orchis cordigera) in flower, Sierra de Grazalema Natural Park, southern Spain, May.

Dave Watts / Dark green fritillary (Argynnis aglaja) on pink clover, south west France.

Richard Du Toit / Longtailed widowbird (Eupletes progne) male perched in flowers, Rietvlei Nature Reserve, South Africa.

Michael Hutchinson / Dandelion (Taraxacum) seed head in grass meadow, Ashton Court, North Somerset, UK, May.

Kirkendall-Spring / Hiker crossing Newton Creek, Elk Meadows Trail, Mount Hood Wilderness. Oregon, USA, July 2014. Model released.

Ann & Steve Toon / Cornfield annual summer wildflowers growing on one of the plant charity Landlife's National Wildflower Farms, St Helens, Merseyside, UK, June.