By some bizarre quirk of fate, this little guy has three entire swan plants all to himself.
Let’s call him Nigel (no mates). When Nigel catches up with his butterfly buddies in a few weeks, and they’re talking about the rough and tumble of trying to get enough food to eat, head butting competitors to certain death below, that sort of thing, he’s going to be like “what are you talking about?!?”
On the other hand, there currently aren’t even any eggs on any of the other plants, so he’s probably going to pupate without ever having even met another caterpillar. This is like being an extreme only child. I know his brain is the size of a pin, but wouldn’t that be lonely? I’m really not sure if he’s in an enviable position or not.