Forages under water, and spends much time under water. Dense, mature riparian habitats with logs or litter are preferred for foraging and nesting. Adjoining dense, mature, wet forests for winter dispersal also may be important. Appears to be primarily crepuscular and nocturnal, but occasionally is trapped during the day. No data found.
Information is scarce.
One litter was found in March. Litter size probably 3-4, with 4 most frequent. Predators are likely to be owls, feral cats, Pacific giant salamanders, and large fish. Whitaker et al. This species is poorly studied.