• An ant infected with larvae of the trematode, Dicrocoelium, clinging to a flower in Cypress Hills Park. (photo by A. Hurly)

  • Cross-section of the head of an ant infected with the trematode Dicrocoelium dendriticum.

  • Leopard frog with an extra hindlimb caused by infection with the trematode Ribeiroia sp.

  • The brains of these fathead minnows are infected with larvae of a trematode, Ornithodiplostomum ptychocheilus.

  • Western tiger salamanders in southern Alberta are periodically exposed to an emerging virus, known as ATV.

  • Terrestrial snails, Oreohelix spp., in Cypress Hills Park in southeastern Alberta.

  • The University of Lethbridge sits on the edge of the Oldman River Valley (photo by Stew Rood).