After having chased several of these butterflies fruitlessly, this one posed for me staying still on the ground for about one minute. The food plant is Aristolochia baetica (Dutchman's Pipe) which grows not far away.

Hillside near Cortijo Valverde, Andalucia, Spain 2nd April 2008

Added on 25th June & November 6th 2008, updated 8th June 2010