Salt marsh
The mice depend heavily on vegetation cover, particularly pickleweed and tules ("Schoenoplectus" spp.). Pickleweed ("Salicornia virginica") is their primary and preferred habitat, as well their main food source, but "R. raviventris" is found in a variety of marsh habitats, including diked and tidal wetlands. Salt marsh harvest mice are not an aggressive species; many mice live in close quarters, withstanding short durations of high population density due to seasonal flooding that restricts individuals to small patches of dry ground. They can also survive tidal or seasonal flooding due to their superior ability to swim, float and climb.