Hi Marc,

That is a cool find!! I believe that is one of our native earthworms from the family Megascolecidae. Some of the more common species in our region are in the genera Toutellus, Driloleirus (including the potentially endangered Oregon giant earthworm), and Agrilophilus, but to tell which one you may have found would require dissection.

Our native megascolecid worms are usually observed much less often than the introduced worms from the family Lumbricidae. Comparing megascolecid and lumbricid worms, megascolecids are typically longer and paler. Below is a link where you can see a good photo of an introduced nightcrawler worm (Lumbricus terrestris), which is the largest lumbricid worm in our area, for comparison. https://www.epicgardening.com/composting-worms-types/

Color and size are pretty good clues to help you ID the different families of worms, but to be certain, you would want to look for the position of the external reproductive structures (the clitellum and the male and female reproductive pores). These are further forward on the body in megascolecid worms than they are in lumbricid worms.

Incidentally, there is also an introduced megascolecid worm from Asia called the Asian jumping worm (Amynthas agrestis) that is not common here but is quite common in other parts of North America. Here is a link about those. Individuals in that species are smaller than our native megascolecid worms though. https://en.wikipedia.org/wiki/Amynthas_agrestis

Hope that helps!
Yours,

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