Nick Garbutt,Nick Garbutt / Tourist watching masses of butterflies drinking from temporary pools. Various species including Large Orange Sulphur (Phoebis agarithe), Cloudless Sulphur (Phoebis sennae), White-angled Sulphur (Anteo...

Nick Hawkins / Orange-barred sulphur butterfly (Phoebis philea) pe. Costa Rica

Nick Hawkins / Cloudless sulphur butterfly (Phoebis sennae) photographed on white. Costa Rica, March.

Rolf Nussbaumer / Sleepy Orange (Eurema nicippe), newly hatched caterpillar eating egg case, Texas, USA. June

Michel Poinsignon / Berger's Clouded Yellow Butterfly (Colias alfacariensis) pair mating, Ottange, Lorraine, France, October.

Stephen Dalton / Barred sulphur butterfly (Phoebis philea) Florida, USA, February.

Stephen Dalton / Orange barred sulphur (Phoebis philea) in flight, controlled conditions, from the Caribbean

MYN / David Hunter / Orange Sulphur Butterfly (Colias eurytheme) San Joaquin River Gorge, Auberry California, May. meetyourneighbours.net project

MYN / David Hunter / Orange Sulphur Butterfly (Colias eurytheme). San Joaquin River Gorge, Auberry California, May. meetyourneighbours.net project

John Abbott / Orange sulphur butterfly (Colias eurytheme) on flower, Sam Houston National Forest, Texas, USA, April

Konrad Wothe / Orange-barred Sulphur (Phoebis philea) feeding on flower nectar, native to South America

Rolf Nussbaumer / Orange Sulphur butterfly (Colias eurytheme) dew covered male at rest on Rattlesnake flower (Brazoria truncata) Fennessey Ranch, Refugio, Coastal Bend, Texas Coast, USA