“Can you please help identify this worm?” asks this reader in their submission regarding the white and yellow-striped worm-like critter pictured below. “Thank you. I really appreciate it.” Well first off, we want to say thank you to our reader for sending in this great photo! To us, this looks like a caterpillar of some kind, though we are not entirely sure what species of caterpillar it is. It could also be a sawfly larva, which are often mistaken for caterpillars. What we will say is that we recommend that our reader avoid direct physical contact with the creatures, since we do not know what they are. Allergic reactions can occur with unknown species. We do not think it is highly likely with this caterpillar, as typically poisonous caterpillars possess bristles, but that is not always a given.