What's That Bug? does not endorse extermination

Group locomotion
Hi,
I saw this on the western andean slopes in Ecuador – fascinating! But what is it?
Thanks,
Hugh

Hi Hugh,
Caterpillars that move in this manner are generally referred to as Army Worms. They travel in a mass to the next source of food.

Update:  March 26, 2016
We just received a comment indicating these look more like Sawfly larvae.  Looking closely at this nine year old posting, and considering what we have learned since then, we are in agreement.

What's That Bug? does not endorse extermination
Location: Ecuador

2 Responses to Army Worms in Ecuador probably Sawflies

  1. Bill Gerth says:

    Hi folks,

    Those actually look a bit like sawfly larvae rather than caterpillars. It’s hard to tell with the photo resolution, but there are some social sawflies that move in groups like this…
    Cheers,
    Bill

    • bugman says:

      Thanks for providing a correction on this nine year old posting. Looking closely, we believe you are correct. We have updated the posting.

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