Caterpillar Tracks?

I don't think the caterpillar was too pleased about dying like this. I think I know what is going on, but I have never seen it before in real life death.

just imagine if humans could have the same thing happen!

sonny davis wrote:just imagine if humans could have the same thing happen!

Welcome to Permies Don't we suffer from all sorts of parasites? We usually don't have them eat the whole of us out from underneath us, however.

Prof  Hans Smid's website. Vimeo page with same video on. Scroll down to third video. As R Ranson suggests, only suitable for people with a strong stomach. After the emergence of the wasp grubs, the video runs faster than in real life.
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The wasps have fledged and flown the nest. The photo was taken on Wednesday. I believe the little critters are called Cotesia glomerata.

Also posted on CodeRanch

[edit]Spelling corrections and corrected link for the Vimeo site.