Geoff Scott-Simpson / Northern marsh orchid {Dactylorhiza purpurella} Derbyshire, UK Peak District NP

David Woodfall / Northern marsh orchid (Dactylorhiza purpurella ) amongst Machair flowers North Uist, Outer Hebrides, Scotland, UK, July.

David Woodfall / Northern Marsh Orchid (Dactylorhiza purpurella ) amongst Machair flowers, The Borve, North Uist, Scotland, UK, July.

Robert Thompson / Northern marsh orchid (Dactylorhiza purpurella) amongst Lady's bedstraw (Galium verum). In dunes between Carrigart and Downings, County Donegal, Republic of Ireland. July.

Ernie Janes / Northern marsh orchids (Dactylorchis purpurella) in flower among buttercups, Machair, North Uist, Scotland, UK. June.

Ernie Janes / Northern marsh orchids (Dactylorchis purpurella) in flower among buttercups, Machair, North Uist, Scotland, UK. June.

Chris Mattison / Northern marsh orchid (Dactylorhiza purpurella) flower, Shetlands, Scotland, UK, June.

Ole Jorgen Liodden / Common spotted-orchid (Dactylorhiza fuchsii) close up of flower, Norway.

Ole Jorgen Liodden / Marsh helleborine (Epipactis palustris) with Arctiid caterpillar (Arctidae) Hole, Norway, July.

Ole Jorgen Liodden / Marsh helleborine (Epipactis palustris) with Arctiid caterpillar (Arctidae) Hole, Norway, July.

Ole Jorgen Liodden / Marsh helleborine (Epipactis palustris) close up of flower, Hole, Norway, July.

Ole Jorgen Liodden / Marsh helleborine (Epipactis palustris) with Arctiid caterpillar (Arctidae) Hole, Norway, July.