….yet another in the series of weird-ass bugs of Costa Rica. I’m guessing these are some sort of caterpillar. However, I’ve never seen this rather bizarre/interesting behavior in a caterpillar before. They are sensing the one in front of them in order to maintain their ability to follow each other in single file, perhaps to look larger or to lessen (slightly) the chance of being picked off by a bird. Although their bright yellow coloration doesn’t seem to be all that helpful in that regard. Any ideas on what these might be the larval state of? Pura Vida

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