Battus philenor and Vanessa cardui

Question

What is the major difference between the insects Battus philenor and Vanessa cardui?

Answer 1

Battus philenor will collect nector from plant species called Catharanthus roseus and Vanessa cardui collects from Aster Species.

Battus philenor differ from Vanessa cardui in a number of anatomical traits:

1. Their caterpillars possess a unique organ at the back their heads, called the osmeterium.

2. The second anal on the adult forewing extends to the wing margin and does not converge with the first anal.

3. The cervical sclerites join beneath the neck.