That was the question a student had this morning.

The caterpillar was wiggling a bit, but didn’t look so good. Upon closer inspection, it appeared it had burst open, and something was actually… inside of it.

Without further ado, here is what happened next:

I have yet to identify the parasitoid, it appears to be a fly maggot of some sort. I will be back with an update if we put a name on it.

Yes, it had eaten all of the caterpillar’s insides.

No, the caterpillar is no longer alive.

[UPDATE] The maggot is in the family Tachinidae.