University of Idaho graduate student Yaniria Sanchez-de Leon samples a Palouse Prairie remnant south of Moscow for earthworms. She found the rare giant Palouse earthworm at a different site north of Pullman, Wash.

The large, white worm at the top is the giant Palouse earthworm, Driloleirus americanus. Below is the southern worm or Aporrectodea trapezoides, which is considered an introduced species.

The bottom photo shows the anterior, ventral view of the giant Palouse earthworm specimen collected by Yaniria Sanchez-de Leon.

Please credit the photos to: Yaniria Sanchez-de Leon/University of Idaho ?? 2005