Ingo Arndt / Painted lady butterfly (Vanessa cardui) in flight, Germany

Ingo Arndt / Close-up of Owl butterfly (Caligo memnon) face, Central America (Captive)

Ingo Arndt / Pupa of Common sargeant butterfly (Athyma perius)

Ingo Arndt / Monarch butterfly (Danaus plexippus) hanging from a blade of grass, silhouetted against the full moon, East coast USA.

Ingo Arndt / Monarch butterflies (Danaus plexippus) flying in warmth of midday sun, overwintering colony in Michoacan, Mexico

Ingo Arndt / Monarch butterflies (Danaus plexippus) drinking from pool of water, overwintering colony, Michoacan, Mexico

Ingo Arndt / Male Monarch butterfly (Danaus plexippus) feeding on nectar of Goldenrod flowers, East coast, USA

Ingo Arndt / Brush footed butterfly caterpillar mimics snake {Archaeoprepona demophoon} Guanacaste, Costa Rica

Lorraine Bennery / Knapweed fritillary butterflies (Melitaea phoebe) on Green winged orchid (Anacamptis morio), Grands Causses Regional Natural Park, France, May.

Floris van Breugel / Monarch butterflies (Danaus plexippus) over winter on Eucalyptus and Monterey Cypress trees near Pismo Beach, San Luis, California, USA December.. When temperatures warm up enough, they will embark on...

Alex Hyde / Painted lady butterfly (Vanessa cardui) on flower, Peak District National Park, Derbyshire, UK. September.

Jussi Murtosaari / Peacock butterfly (Inachis io) newly emerged on asters, Jyvaskyla, Finland, August.