frass expulsion

[Rudy Benavides]

Liz asked:
>Do most caterpillars shoot their frass out like this?

A 1st instar monarch caterpillar (< 2 mm)that I have in a petri dish is 
doing just that.  It raises the tip of its abdomen (scorpion-like) and fires 
the frass away from itself.

Rudy/MD

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