Willi Rolfes/ BIA / Pink Lady Slipper Orchid (Cypripedium calceolus) flowers, Lower Saxony, Germany

Ross Hoddinott / Early-purple orchids (Orchis mascula), Broxwater, Cornwall, UK. April 2017.

Ross Hoddinott / Common spotted orchids (Dactylorhiza fuchsii), backlit, Volehouse nature reserve, Devon, UK, June 2017.

Lorraine Bennery / Knapweed fritillary butterflies (Melitaea phoebe) on Green winged orchid (Anacamptis morio), Grands Causses Regional Natural Park, France, May.

Neil Aldridge / Two Lady's slipper orchids (Cypripedium calceolus) in flower in spring in woodland near Kuressaare, Saaremaa, Estonia.

Andres M. Dominguez / Mirror orchid (Ophrys speculum) in the Sierra de Grazalema Natural Park, El Bosque, southern Spain, April.

Andres M. Dominguez / Orchid (Ophrys atlantica) Sierra de Grazalema Natural Park, Benaocaz, southern Spain, May.

Andres M. Dominguez / Dark-red helleborine (Epipactis atrorubens) Linares, Cantabria, Spain, August.

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.

MYN / Corne van der Linden / Variety of orchids from the Banksia Woodland, Swan Coastal Plain. Including Pansy orchid (Diuris magnifica), Slender sun orchid (Thelymitra vulgaris), Cowslip orchid (Caladenia flava), Plain sun orchi...

Staffan Widstrand / Wild Wonders of China / Low's cymbidium (Cymbidium lowianum) endemic tree orchid, Gaoligongshan NP, Yunnan province, China