'''Intermediate hosts''': Land snails, mainly ''Zebrina detrita'' within Europe. Brown ants of the genus ''Formica'' are also required for completion of the life cycle.
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'''Definitive hosts''': ''D. dendriticum'' is most commonly seen in sheep, cattle, deer, and goats, but is occasionally seen in horses and pigs.
*This is a small fluke (<1.5cm) found in the bile ducts of ruminants and some other herbivores
*This is a small fluke (<1.5cm) found in the bile ducts of ruminants and some other herbivores