Human-made structures such as buildings and culverts are also used. Dens in sites described above for cover requirements. Drinking water required. May concentrate around water sources during periods of drought. The opossum prefers moist, brushy areas near streams, marshes and other water sources.
Ecotonal situations are preferred.
Active from dusk to dawn, the opossum often has an activity peak near midnight. During periods of extreme cold, there may be some diurnal activity. Activity is lower in winter, and the opossum may remain inactive in its burrow for several days. Fat is accumulated in the fall and used as an energy reserve for periods when food is limited. Home ranges vary in size.