Ernie Janes / Cowslips (Primula veris) in flower, Norfolk, England, UK, April.

Sandra Bartocha / Cowslip (Primula veris) flowers, Brandenburger Vorstadt, Potsdam, Germany, April

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

Stephen Dalton / Buff-tailed Bumblebee (Bombus terrestris) worker bee flying to Cowslip (Primula veris) flowers. UK, April.

Ross Hoddinott / Cowslips (Primula veris) backlit in evening light, Durlston Country Park, near Swanage, Dorset, UK, April.

Guy Edwardes / 2020VISION / Cowslip flowers (Primula veris), Catcott SWT reserve, Somerset Levels, England, UK, April. Photographer quote: 'Finding a perfect group of cowslips takes time, as does washing all your clothes when yo...

Colin Varndell / Cowslip (Primula veris) flowering in meadow, Cogden, Dorset, England UK. May

Russell Cooper / Cowslip (Primula veris) in flower, North Downs, Surrey, England, UK

Colin Varndell / Cowslip (Primula veris) in bloom, Dorset, UK, May

Sandra Bartocha / Red-flowered Cowslip (Primula veris), Potsdam, Brandenburg, Germany

Peter Lewis / Cowslip (Primula farinosa) Martin Down, Hampshire England

Peter Lewis / Cowslip (Primula veris) Martin Down, Hampshire England, April