Mus musculus, commonly known as the house mouse, is a small rodent belonging to the family Muridae. It typically has a slender body, large ears, and a long tail. House mice are found in a variety of habitats, including urban areas, fields, and forests, and they are known for their adaptability and reproductive capabilities. These mice are primarily nocturnal and have a diet that consists of seeds, grains, and fruits. Mus musculus plays a significant role in scientific research, particularly in genetics and medicine, due to its genetic similarity to humans and its short reproductive cycle.