A carpet of tall scurf-pea Cullen australasicum, foodplant of the Chequered Swallowtail growing along the floodplain of the inland Palmer River after rain and flooding.

Fertile egg of the Chequered Swallowtail. Newly laid eggs are pale yellow.

Final fifth instar larvae feeding on a tall scurf-pea. The orange larva has just moulted from the fourth instar. The orange colour will gradually change to green as the larva completes the final instar stage, and the green larva illustrated is the stage immediately before pupation.

Final fifth instar larva from Alice Springs feeding on Citrus.

Osmeterium on a third instar larva.