White Commodore Butterfly Caterpillar with Parasitic Wasp Cocoons
Parasarpa dudu
22.7733, 100.971
Field Notes
Description:
I would have much preferred to find this astonishing tentacled pompom-wielding caterpillar without its heavy burden of parasitoid wasp cocoons, but nature is a twisted malicious wonder. Most likely without it's terminal affliction, this caterpillar would not have been so easily spottable so we could bear witness to its splendour and its grisly demise.
Firstly, this is the larva of the White Commodore (Parasarpa dudu, Nymphalidae). See the butterfly here.....
http://www.flickr.com/photos/itchydogimages/8463976414/
This individual is bearing braconid wasp (Braconidae) cocoons on its back which means the parasitic phase of the relationship is over but the caterpillar's future is limited.
The course of events is as follows: braconid wasp eggs are laid on the host's skin. Larvae burrow inside the caterpillar, which at first continues to develop almost normally as the wasp larvae selectively devour non-essential tissue (after all it is essential that the host survives long enough for the wasp life cycle to be completed). They eventually stop feeding and cut holes in the host's skin in order to reach the outside. They pupate inside white cocoons spun on the host's skin. The caterpillar often dies before adult wasps emerge from cocoons.
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