Which of the following is a characteristic of house mice?

House mice, scientifically known as Mus musculus, are indeed typically around 3 to 4 inches in length, excluding their tail. This size is a distinguishing characteristic that helps differentiate them from other rodent species. Their small size enables them to adapt easily to various environments, including human dwellings, where they can squeeze through tiny openings.

While the other options may describe certain animal traits, they are not characteristic of house mice. For example, house mice generally weigh much less than 5 ounces, their tails are usually about the same length as their bodies (rather than over 8 inches), and they are not aquatic animals, so they do not live in water. This specific size attribute is crucial for anyone studying pests or considering pest control measures, as it aids in identification and understanding of their habits.