Pal Hermansen / Common brimstone (Gonepteryx rhamni) flying in summer meadow amongst Knapweed (Centaurea sp). Hvaler, Ostfold, Norway. July.

Stephen Dalton / Brimstone butterfly (Gonepteryx sp) in flight over Buddleia flowers, England, UK

Adrian Davies / Male Brimstone butterfly {Gonepteryx rhamni) on March thistle UK, Europe

David Kjaer / Brimstone butterfly on Pussy willow catkins, UK

David Tipling / Common brimstone butterfly (Gonepteryx rhamni) male North Norfolk, England, UK. February

Kerstin Hinze / Painted lady (Vanessa cardui) nectaring, with a Common brimstone (Gonepteryx rhamni) flying past, Bavarian Forest National Park, Germany, June.

Konrad Wothe / Slow motion clip of a male Brimstone butterfly (Gonepteryx rhamni) landing and feeding on Purple betony (Stachys officinalis), Bavaria, Germany, July.

Konrad Wothe / Slow motion clip of a male Brimstone butterfly (Gonepteryx rhamni) nectaring on Purple betony (Betonica officinalis) before taking off, Bavaria, Germany, July.

Konrad Wothe / Slow motion clip of a male Brimstone (Gonepteryx rhamni) nectaring on Purple betony (Betonica officinalis), before taking off, Bavaria, Germany, July.

Konrad Wothe / Slow motion clip of a male Brimstone (Gonepteryx rhamni) nectaring on Purple betony (Betonica officinalis), before taking off, Bavaria, Germany, July.

Dave Bevan / Common brimstone (Gonepteryx rhamni) nectaring on Common comfrey flowers (Symphytum officinale) before being displaced by a Bumblebee (Bombus), Norfolk, England, UK, June.

Rod Williams / Brimstone butterfly (Gonepteryx rhamni) male feeding on Everlasting sweet pea (Lathyrus latifolius) Brockley Cemetery, Lewisham, London, England, UK. July.