Dicrocoelium dendriticum
The trematode Dicrocoelium dendriticum occurs in cattle, sheep and other ungulates in many parts of the world, including western Canada.
Fasciola hepatica
The trematode Fasciola hepatica (the common liver fluke of ruminants) infects cattle and sheep, and less commonly a range of domestic and wildlife species, around the world.
Fascioloides magna
The trematode Fascioloides magna (the large liver fluke of ungulates) occurs in several areas of the world, including parts of Canada.