The house mouse, Mus musculus domestica, is a small rodent with a pointed snout, small rounded ears, and a long, almost hairless tail. Found worldwide, it thrives in human habitats, showcasing adaptability and social behavior. Known for its rapid reproduction, it plays a crucial role in scientific research.

The house mouse (Mus musculus domestica) is originally native to the Palearctic region, specifically in the regions of Southern Asia. However, due to its close association with human habitats, it has been introduced worldwide and is now found on every continent except Antarctica.

Mus musculus domestica typically thrives in environments closely associated with human settlements. These include urban and suburban areas where they can find shelter and food. They are highly adaptable and can live in a wide range of climatic conditions, from temperate to tropical regions.

The house mouse occupies a commensal niche in human-dominated environments. It often inhabits buildings, agricultural areas, and other places where food and shelter are readily available. They are opportunistic feeders, consuming a variety of food items from grains and seeds to human food scraps. Their ecological role includes seed dispersal and acting as prey for a variety of predators.