Mice are found in a wide variety of ecosystems, but they are most commonly associated with terrestrial ecosystems, particularly those that are human-modified. Here's a breakdown:

* Terrestrial ecosystems:

* Forests: Mice are found in many types of forests, from deciduous to coniferous, providing them with shelter and food sources.

* Grasslands: Grasslands offer open spaces for foraging and nesting, making them suitable habitats for mice.

* Agricultural areas: Fields and farms provide abundant food sources for mice, making them a common pest in these environments.

* Urban and suburban areas: Mice thrive in human-modified landscapes, finding shelter in buildings, gardens, and parks.

* Aquatic ecosystems: While mice are primarily terrestrial, some species, like the rice rat, are semi-aquatic and live near water bodies.

It's important to note that mice are generalist feeders and can adapt to various food sources, making them successful in many different environments.