Notocotylus

Adults live in the cecum of aquatic birds and mammals. Eggs pass in the feces, undergo a period of development, and a miracidium emerges. The miracidium infects aquatic snails, and passes through the mother sporocyst, mother redia, and daughter redia stages. Cercariae emerge from the daughter redia and leave the snail. They encyst as metacercariae on aquatic vegetation or even on the shells of other molluscs. When eaten by another bird or mammal, they excyst in its intestine and mature in its cecum.