A large yellow butterfly with four black stripes on the forewing, and a medium length tail on the hindwing. The antennae club is straight and white tipped. Male and female are usually very similar but males may be more intensely coloured than females, as well as being considereably smaller than females. The wing shape is quite distinctive, though could be confused with I. podalirius, which is somewhat paler in colour, with a long, white-tipped tail, and six black stripes on the forewing. It also resembles P. machaon, which has a scalloped submarginal black band, and the antennae are black and hooked.
Generalised wing venation diagram
A generalised diagram of butterfly wing venation, with anatomical labels - by Gillian Elsom.
Papilionidae wing venation diagram
The wing venation of a Swallowtail butterfly Papilio machaon an example of a butterfly from the family Papilionidae - by Gillian Elsom.
Hilly country, with hot dry slopes and therefore mostly restricted to the northern uplands of Corfu.