“I found this guy in Lloydminster, Saskatchewan, Canada. What can I feed him?” writes this reader about the stick-like worm pictured below. At first, we did not see what our reader was referring to. We thought it was just one long branch. But then we noticed that the twig-like object on the right did not exactly match the rest of the branch, and does look like a separate entity. We think this is a stick caterpillar, which is a larva of the peppered moth. They are not the same things as stick insects, which are not worms or larvae of any kind, but a completely different species.