Family - PAPILIONIDAE
Tribe - TROIDINI
Cressida cressida Wollongong,
New South Wales, Australia
© David Fischer
The genus Cressida
comprises of a single species which is endemic to the Australian
region. It has several unusual characteristics. The antennae for
example are straight, not recurved as they are in all other
Papilioninae. Less obvious is the fact that the female has an
abdominal pouch ( sphragis ) which projects after fertilization and
prevents further her from mating with other males. This feature is
only found elsewhere only in the primitive neotropical genus
Euryades, and in the Parnassiinae.
Cressida cressida is
found in eastern Australia, Papua New Guinea and the Torres Strait
species inhabits open lightly wooded areas at elevations between sea
level and about 500m.
egg is deep yellow, dome shaped and adorned with numerous raised
orange tubercles. It is laid singly on
Aristolochia ( Aristolochiaceae ). When fully grown the
caterpillar is maroon with creamy markings and short lateral and
dorsal tubercles, some of which are cream while some are maroon.
When ready to pupate they leave the foodplant and walk with a jerky
movement, covering quite long distances in a series of short rapid
establish territories and patrol regularly back and forth across them
in search of females.