Don't Eat Me: Caterpillar That Looks Like Snake's Head

May 29, 2014


This is a series of photographs from University of Pennsylvania biology professor Daniel Janzen of a species of caterpillar in Costa Rica (and other Central American countries) that has a realistic looking snake's head on its underside. Plus it will actually try to strike like a snake if you get too close. I don't know about you, but that would trick me if I were a predator. I'm going to eat you! Oh shit, no I'm not! Sorry Mr. Snake, I was just, uh, I was just reaching for these berries. Yeah, I was just going to eat these berries. "Those are poisonous." *swallowing handful* Finally.

Keep going for a couple more shots of the please do not back that ass up.




Thanks to Dio, who once bit the head off a viper because it was either him or the snake.

  • Closet Nerd

    I would put that

  • Closet Nerd

    in my butt

  • zin

    I hate to admit it but you have your moments.

  • Closet Nerd

    that is an impostor

  • zin

    You both sound the same.

  • MustacheHam

    Presenting: The world's scariest butt!

  • Altior

    How can you explain that, Evolutionists? (I know I'm getting myself into the sluice of trouble, but please, reply) :)

  • zin

    ...I'm only giving you a response because you specifically asked for one.

    These aren't the first creatures to have asses (or other body areas) that look like they have another face. This creature is definitely more interesting in that it mimics a predator to ward off other predators, but there are lots of other critters that have spots mimicking an extra pair of eyes (fish, butterflies, etc). Wiki Eyespots for more information.

    Point being, this defense mechanism has been long in the making, & if anything, the fact that this cute caterpillar has developed something a little more advanced (though not as advanced as the Mimic Octopus) is proof of evolution doing its work.

  • Altior

    So snakes evolved first? But how can you be sure they did?

    This certain caterpillar just loved looking at snaked and decided to grown into one? How does that work.....?

  • zin

    Are you still around? What is your opinion to the responses you've received? Contemplative? Scared?

    The important thing is that you use your own (in your case, God-given) brain to work out what you yourself believe, & not just swallow what you heard people preaching since your first memories. This of course includes both evolutionist & creationist preachings.

  • ben

    another question would be, what is your alternative solution, God?
    why would a God do this? to stop it getting eaten? if so why does this creature get special dispensation whilst others are left to be preyed upon?

  • Guest

    butt faces are funny yo

  • The Magnificent Newtboy

    And why does god presumably want the predator to starve? It raises a few questions lol

  • Butterblast
  • Diogeneticist

    It's pretty simple. A long while ago a few of these caterpillars had a random mutation which caused their behinds to be bumpy in a way which looked a little like a snake's face.

    More timid predators or predators with poor eyesight would tend to avoid these slightly snake-like caterpillars and in general the caterpillars which looked more like snakes than other caterpillars would be much more likely to mature and lay eggs.

    All of the bumpy caterpillars which reached maturity would then have children which were similarly bumpy. These bumpy caterpillars would then have an advantage over the non-bumpy caterpillars: they would be a little less likely to be eaten.

    Now these bumpy caterpillars don't have exactly the same markings, and some of the caterpillars are better camouflaged and more similar to snakes. Of all the bumpy caterpillars, the ones with the markings most similar to snake-heads would be the most likely to procreate, and conversely, the ones with markings least similar to snake-heads would be the least likely to procreate.

    This means with every generation the caterpillars become ever so slightly more snake-like.

    If you carry on this process for many, many generations, what started as a vague similarity becomes a very, very fine facsimile.

  • The Magnificent Newtboy

    Very nicely put.

  • Matty Spinny

    oh mother nature. you so crazy

  • dauntless

    if that's not an example of extreme evolution i don't know what is

  • Mainarynox

    Said the exact thing in my head and then I saw you already commented this. Thief.

  • brodyc

    He's evolved into a telepath.

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