Stephen Dalton / Orange tip butterfly (Anthocharis cardamines) male in flight amongst Lady's smock or Cuckooflower (Cardamine pratensis),England.

Edwin Giesbers / Orange tip butterfly (Anthocharis cardamines), two females on Cuckooflower (Cardamine pratensis) in marshy grassland, egg visible on stem. April 2009.

Edwin Giesbers / Orange tip butterfly (Anthocharis cardamines) two females on Cuckooflower (Cardamine pratensis). The Netherlands. March.

Edwin Giesbers / RF - Green-veined white butterfly (Pieris napi) on Cuckooflower (Cardamine pratensis), in meadow amongst Buttercup (Ranunculus sp) flowers. The Netherlands. March. (This image may be licensed either a...

Alex Hyde / Orange tip butterfly egg (Anthocharis cardamines) on Cuckoo flower / Lady's smock (Cardamine pratensis). Peak DIstrict National Park, Derbyshire, UK. May.

Nick Upton / Cuckoo flower / Lady's smock (Cardamine pratensis) clump flowering on a marshy water meadow, Wiltshire, UK, April.

Nick Upton / Cuckoo flower / Lady's smock (Cardamine pratensis) clump flowering on a marshy water meadow, Wiltshire, UK, April.

Edwin Giesbers / Green-veined white butterfly (Pieris napi) on Cuckooflower (Cardamine pratensis) in evening light. The Netherlands. March.

Ross Hoddinott / Cuckooflower / Lady's smock (Cardamine pratensis) flower, Combe Valley, Cornwall, UK. May .

Steve Nicholls / Cuckoo flower or Lady's smock (Cardamine pratensis) on Hawkesbury Common, Gloucestershire, England, UK. April.

Steve Nicholls / Cuckoo flower or Lady's smock (Cardamine pratensis) on Hawkesbury Common, Gloucestershire, UK. April.

Andy Sands / Orange tip butterfly (Anthocaris cardamines) on Cuckoo flower / Lady's smock (Cardamine pratensis), Hertfordshire, England, UK, April - Focus Stacked

Andy Sands / RF - Orange Tip Butterfly (Anthocaris cardamines) on Cuckoo flower / Lady's smock (Cardamine pratensis), Hertfordshire, England, UK, April - Focus Stacked (This image may be licensed either as rig...

Robert Thompson / Orange-tip butterfly (Anthocharis cardamines), male on Cuckooflower (Cardamine pratensis). Brackagh Moss National Nature Reserve, Portadown, County Armagh, Republic of Ireland. May.

Robert Thompson / Orange-tip butterfly (Anthocharis cardamines), male on Cuckooflower (Cardamine pratensis). Brackagh Moss National Nature Reserve, Portadown, County Armagh, Republic of Ireland. May.

Sue Daly / Lady's smock (Cardamine pratensis), Sark, British Channel Islands, April.

Lorraine Bennery / Orange tip butterfly (Anthocharis cardamines) female resting on Cuckooflower (Cardamine pratensis), Essonne, France, May.

Klein & Hubert / Cuckooflower (Cardamine pratensis) flowers in spring, France

Ross Hoddinott / RF - Green-veined white butterfly (Pieris napi) on Ladies smock (Cardamine pratensis), in-camera double exposure to create soft focus effect, Cornwall, UK. May. (This image may be licensed either as r...

MYN / Marc Pihet / Cuckoo flower (Cardamine pratensis), Maine-et-Loire, France, April, meetyourneighbours.net project

MYN / Marc Pihet / Cuckoo flower (Cardamine pratensis), Maine-et-Loire, France, April, meetyourneighbours.net project

Mike Read / Water avens (Geum rivale) Cuckoo flower (Cardamine pratensis) and Marsh marigold (Caltha palustris) flowering in water meadow, Ringwood, Hampshire, UK April

Mike Read / Cuckoo flower (Cardamine pratensis) and Ribwort plaintain (Plantago lanceolata) flowering in water meadows, Ringwood, Hampshire, UK April

Mike Read / Cuckoo flower (Cardamine pratensis) and Ribwort plaintain (Plantago lanceolata) flowering in water meadows, Ringwood, Hampshire, UK April

Alex Hyde / Orange tip butterfly caterpillar (Anthocharis cardamines) feeding on Cuckoo flower / Lady's smock (Cardamine pratensis), Peak District National Park, Derbyshire, UK. June.

Chris Mattison / Orange-tip butterfly caterpillar (Anthocharis cardamines) on Lady's smock / Cuckooflower (Cardamine pratensis) Gower Peninsula, Wales, UK, June.

Bernard Castelein / Grizzled skipper butterfly (Pyrgus malvae) on Cuckoo flower (Cardamine pratensis) , Klein Schietveld, Brasschaat, Belgium

Bernard Castelein / Orange tip (Anthocharis cardamines) male on Cuckoo flower (Cardamine pratensis) Klein Schietveld, Brasschaat, Belgium, May.

Chris Mattison / Orange-tip butterfly (Anthocharis cardamines) eggs on Cuckoo flower (Cardamine pratensis) Nottingham, England, UK, May. Focus stacked image.

Chris Mattison / Orange-tip butterfly (Anthocharis cardamines) eggs on Cuckoo flower (Cardamine pratensis) Nottingham, England, UK, May. Focus stacked image.

Alex Hyde / Cuckooflower / Lady's smock (Cardamine pratensis) flower, Peak District National Park, Derbyshire, UK. May.

Alex Hyde / Orange tip butterfly egg (Anthocharis cardamines) on Cuckoo flower / Lady's smock (Cardamine pratensis). Peak DIstrict National Park, Derbyshire, UK. May.

Alex Hyde / Orange tip butterfly egg (Anthocharis cardamines) on Cuckoo flower / Lady's smock (Cardamine pratensis). Peak DIstrict National Park, Derbyshire, UK. May.

Alex Hyde / Orange tip butterfly egg (Anthocharis cardamines) on Cuckoo flower / Lady's smock (Cardamine pratensis). Peak DIstrict National Park, Derbyshire, UK. May.

Andy Sands / Orange tip butterfly (Anthocharis cardamines) resting, covered in dew on Cuckooflower / Lady's smock (Cardamine pratensis) Hertfordshire, England, UK, April

Stephen Dalton / Lady's smock flower (Cardamine pratensis) Sussex, England, UK. April.

David Tipling / Orange-tip butterfly (Anthocharis cardamines) on Cuckoo flower (Cardamine pratensis) North Norfolk, UK, May.

Kim Taylor / Orange-tip butterfly (Anthocharis cardamines) male feeding from Cuckoo flower (Cardamine pratensis). Wales, UK, June.

Rod Williams / Cuckooflowers or Lady's Smock (Cardamine pratensis) Brockley cemetery, Lewisham, South East London, England, UK, April

Fabrice Cahez / Cuckoo flower / Lady's smock (Cardamine pratensis), Vosges, France, April.

Fabrice Cahez / Cuckoo flower / Lady's smock (Cardamine pratensis), Vosges, France, April.

Fabrice Cahez / Cuckoo flower / Lady's smock (Cardamine pratensis), Vosges, France, April.

Nick Upton / Low angle view of a clump of Cuckoo flower / Lady's smock (Cardamine pratensis) flowering in a damp meadow, Wiltshire, UK, May.

Nick Upton / Low angle view of a clump of Cuckoo flower / Lady's smock (Cardamine pratensis) flowering in a damp meadow, Wiltshire, UK, May.

Kim Taylor / Green-veined White Butterfly (Pieris napi) male feeding from Cuckoo Flower. Wales, June

Colin Varndell / Lady's smock flowers (Cardamine pratensis) in bloom. Dorset, UK May

Ross Hoddinott / 2020VISION / RF- Orange Tip butterfly (Anthocharis cardamines) female resting on Cuckooflower (Cardamine pratensis). North Devon, UK. April. (This image may be licensed either as rights managed or royalty free.)