What is "water mouse"

Water mouse \Wa"ter mouse`\ (Zo["o]l.) Any one of several species of mice belonging to the genus Hydromys, native of Australia and Tasmania. Their hind legs are strong and their toes partially webbed. They live on the borders of streams, and swim well. They are remarkable as being the only rodents found in Australia.

n. (context zoology English) Any of several species of Australian mouse of the genus ''Hydromys'', native to Australia, with strong hind legs and partially webbed toes.

Water mouse can refer to several unrelated rodents:

• Chibchanomys, two species from western South America;
• Nilopegamys, one species from Ethiopia;
• Rheomys, four species from Central America