@ jprat001 and @EarlyStages, thanks for suggestions.
I researched a bit after you guys showed me a direction, and EarlyStages is right papilio machaon is common in Romania, and after I saw the pictures I remembered seeing it many times...
Thank you both.
Yes, all caterpillars of the butterfly family Papilionidae – which includes about 550 species of Swallowtails, Birdwings, Mormons and Helens, Jays, Festoons, Apollos, etc. – possess an osmeterium (from the Greek word for "smell").
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