Butterfly populations are a very good indicator of the health of an area's ecosystem !!

The adult flies slowly with weak seemingly unsteady wing beats. It is one of the boldest butterflies, protected as it is from predators by a nauseous chemical. 
   When attacked it plays dead and exudes an obnoxious yellowish fluid from glands in the joints of the legs. (Like all butterflies protected in this manner, the Coster has a tough exoskeleton which enables the adult to survive a few pecks of a bird or even the bites of a lizard.)

   Once left alone the adult immediately takes off and resumes its uncaring flight.

Costers.png
Avg. Body Length: 53–64 mm / (2.1–2.5 in)
Avg. Wingspan: 53 - 64 mm / 2.1 - 2.5 "
Diet: caterpillars feed on the leaves, young shoots, tendrils and the outer surfaces of young shoots of Passiflora edulis plant.

Kingdom: Animalia, Phylum: Arthropoda

Class: Insecta, Order: Lepidoptera

The single biggest threat to butterfly survival is habitat destruction!!