0 any bird that spends much of its life on or around a river or lake, especially one that is shot for food or sport -- 水鸟，水禽
The cycle is completed when the metacercariae are consumed by waterfowl.
In other waterfowl surveyed, very few echinostomes were found, with juveniles predominating.
This shows that herbivorous waterfowl (mainly geese) and mammals do check the growth of wetland vegetation.
Various species of wild birds, especially waterfowl such as mallards, constitute an important reservoir of avian influenza viruses.
A variety of organisms inhabit these niches, and it is especially favoured as waterfowl habitat.
The livestock also included numerous rabbits, waterfowl and other birds of various breeds.
Shoreline residents were informed that they should not feed waterfowl, and a clean-up of the snail population was done at the start of the following summer.
Other waterfowl were investigated as available.
