The Lime Butterfly caterpillar passes through 5 different instars before pupation. The first few instars of the caterpillar look like bird droppings and this is nature's way of protecting them from predators. In the 5th (last) instar, the caterpillar becomes pale green with a yellow sub-spiracular band having brown and bluish marking and a pair of false eyes. An additional yellow band is developed on the 4th and 5th segments with bluish spots on it.
Lime Butterfly Caterpillar (1st instar) eating egg shell

Lime Butterfly Caterpillar (2nd instar)

Lime Butterfly Caterpillar (3rd instar)

Lime Butterfly Caterpillar (4th instar)

Lime Butterfly Caterpillar (5th instar)

Lime Butterfly Caterpillar (pre-pupa)