Unknown Black Killer Bug
We have found several of these bugs in our yard. No one knows what they are, and we can’t find them on the internet. We have witnessed one of these bugs bite a earthworm in half. We see them chase the earthworms out of the ground, and attack them. They are pretty fast. We live in Spokane, WA. We hope you can tell us what it is. Thank you very much for your time.

Hi Daniel,
This is a larva of a Ground Beetle in the family Carabidae. We suspect it is a Caterpillar Hunter, Calosoma scrutator.

One Response to Caterpillar Hunter Larva

  1. BJCook says:

    I saw this bug while visiting Spokane and have wondered what it was as well. Vicious killers, I believe hunter is a good word for it. I saw two attacking a worm and threw the worm across the yard and the two bugs started hunting for it immediately. I’m usually not repelled by any type of bug but those bugs are quite disturbing.

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