Thanks Ivan for your comment.
As for your question, the answer is no, the "bubble" on the top of the caterpillar is just a raindrop. The osmeterium is retracted and can't be seen in this photo. It only appears whenever the caterpillar feels threatened. Its location in this photo would be on the leftmost "corner" of the larva, right above its "face".
Seasons Greetings,
Stavros |
Greece
Papilio machaon larva (16)
markop
![Silver Star Critiquer/Silver Note Writer [C: 17 W: 0 N: 27]](http://i1.treknature.com/misc/s-n-s.gif) (111) |
