Mainly nocturnal and rarely seen, the Cinereus Shrew is nonetheless common and widespread below the timberline in northern deciduous and coniferous forests, in both wet and dry habitats. It is also known as the Masked Shrew and the Common Shrew. Learn more about the Sorex cinereus, more commonly known as a Cinereus Shrew, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.