Adult (male), Borbona (Rieti), Italy, July 5, 2003
(Photo by Paolo Mazzei)

Adult (female), Vivaro (Roma), Italy, May 1, 2003
(Photo by Paolo Mazzei)

Adult (male), Pavia, Italy
(Photo by Patrizio Ventura, Forum APB)

Adult (female), Pavia, Italy
(Photo by Patrizio Ventura, Forum APB)

Adult (male), Gran Sasso (L'Aquila), Italy, July 26, 2000
(Photo by Diego Reggianti)

Adult (female), Caldara di Manziana (Roma), Italy, March 2002
(Photo by Ilaria Pimpinelli)

Adult (female), El Cedro, La Gomera, Canary Islands, April 3, 2004
(Photo by Paolo Mazzei)

Adult, Manziana (Roma), Italy, June 1993
(Photo by Paolo Mazzei)

Adult, Roma, Italy, July 1990
(Photo by Paolo Mazzei)

Adult, Amsterdamse Waterleiding Duinen, Netherlands, July 6, 2003
(Photo by Peter Groenendijk, Anything but common)

Adult (female) ssp. polaris (Courvoisier, 1911), Nord Trøndelag Sildhopen-Elokroken, Norway, June 29, 2003
(Photo by Bernard Fransen, Photography of European Butterflies and Moths)

Adult (female) ssp. polaris (Courvoisier, 1911), Nord Trøndelag Sildhopen-Elokroken, Norway, June 28, 2003
(Photo by Bernard Fransen, Photography of European Butterflies and Moths)

Adult (male), Almaceda, Castelo Branco, Portugal, July 26, 2003
(Photo by Paulo Henrique Lopes Rodrigues)

Adult (male), Almaceda, Castelo Branco, Portugal, July 21, 2003
(Photo by Paulo Henrique Lopes Rodrigues)

Adult (male), Peizerwold, Holland, May 28, 2004
(Photo by Henk Dikkema, Vlinders)

Adult (female), Samos, Greece, June 2006
(Photo by Jaroslav Smrz)

Larva, Rohoznik, Slovakia, June 2001
(Photo by Paolo Mazzei)

Egg, Rohoznik, Slovakia, May 2001
(Photo by Paolo Mazzei)