Once a bird feeds on the snail that is infected, the parasite completes its cycle by moving into the bird's digestive system. It grows and matures in the bird, producing eggs that are excreted ...

Brood parasitic birds lay their eggs in the nests of others, sparing themselves the expense of rearing their own young. The resulting coevolutionary arms race includes sophisticated defenses by ...

A type of infectious parasite has been spotted inside invasive snail species brought to Georgia, according to the Department of Natural Resources.