Plate from Adalbert Seitz's The Macrolepidoptera of the World showing both Papilio erostratus and Papilio rogeri pharnaces
It is very similar to Papilio pharnaces but in the male the spots on the upper surface of the hindwing are yellowish white. In the female the spots are red also above, larger than in the female of P. pharnaces the marginal spots of both wings also somewhat larger than in the foregoing species. Tail long and narrow. Sympatric with P. pharnaces in western Mexico.[3]
Habitat
It is most common in hilly country at a height of about 1500 m (approximately 5,000 ft).
Subspecies
Papilio erostratus erostratus – (Guatemala, Costa Rica, Belize)
