Rod Williams / Green tree frog {Hyla cinerea} captive, from USA

Rod Williams / Green tree frog {Hyla cinerea} captive, from USA

David Woodfall / Mountain avens (Dryas octopetala), The Burren, County Clare, Republic of Ireland, May.

Paul Harcourt Davies / Mountain avens (Dryas octopetala) wide angle view, Mt Terminillo, Lazio, Italy, July.

Paul Harcourt Davies / Mountain avens (Dryas octopetala) Mount Terminillo, Lazio, Italy, July.

Paul Harcourt Davies / Mountain avens (Dryas octopetala) Mount Terminillo, Lazio, Italy, July.

Martin Gabriel / White Dryas / Mountain Avens / White Dryad (Dryas octopetala), flower portrait, Austria

Jussi Murtosaari / Mountain avens (Dryas octopetala) in flower, Kilpisjarvi, Enontekio, Lappi / Lapland, Finland. July

Pascal Tordeux / White Dryas / Mountain Avens / White Dryad (Dryas octopetala). French Alps, July.

Konrad Wothe / Mountain avens (Dryas octopetala) flowering on mountainside with the three peaks of Tre Cime in background, Dolomites, South Tyrol, Italy. July.

Konrad Wothe / Eightpetal mountain-avens (Dryas octopetala) flowering, Karwendel Mountains, Alps, Austria, Europe. July.