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

Sandra Bartocha / Cowslip (Primula veris) and Cuckoo Flower (Cardamine pratensis) in flower with light effects, Brandenburger Vorstadt, Potsdam, Germany, April

Ross Hoddinott / 2020VISION / Orange Tip butterfly {Anthocharis cardamines} male resting on Cuckooflower {Cardamine pratensis}, blue background, north Devon, UK, April. Did you know? Sadly butterflies are not as common as they onc...

Ross Hoddinott / 2020VISION / Orange Tip butterfly {Anthocharis cardamines} female resting on Cuckooflower {Cardamine pratensis}, north Devon, UK. April

Guy Edwardes / 2020VISION / Cuckoo flower / Lady's Smock (Cardamine pratensis), Catcott Lows SWT reserve, Somerset Levels, England, UK, April

Bernard Castelein / Orange Tip Butterfly (Anthocharis cardamines) at rest on Cuckoo-flower (Cardamine pratensis) Wuustwezel, Belgium, April

Bernard Castelein / Orange Tip (Anthocharis cardamines) at rest on Cuckoo-flower (Cardamine pratensis) Wuustwezel, Belgium, April

Bernard Castelein / Cuckoo-flower (Cardamine pratensis) Brasschaat, Belgium, April

Ross Hoddinott / Green veined white butterfly {Pieris napi} on Ladies smock {Cardamine pratensis} UK Cornwal

Bjorn Forsberg / Cuckoo flower {Cardamine pratensis} Sweden

Cyril Ruoso / Black slug (Arion ater) eating Cuckooflower (Cardamine pratensis), close up. Yonne, Bourgogne-Franche-Comte, France. April.

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