Lifecycle of a Butterfly Part 2

Did you ever know that when a caterpillar gets frightened, it raises two red antennae-like thing on its head? Well, we definitely didn't know until Eugene went to touch one of the caterpillars. We took this photograph just yesterday, after Maria stroked it with a stick.

Look at the orangey-red antennae when it gets frightened

We did a search on this and apparently it is common, just that it is something we didn't know before. For the record, it is called Osmeterium.