few weeks of life, beginning to develop fur by two weeks, opening their eyes by three weeks, and being weaned between sixteen and twenty five days after birth. The average life expectancy of a vagrant shrew has been estimated at a little over six months. However, they can live much longer; although few survive for more than seventeen months, a few survive their second winter and reach two years of age. References Sorex Animals that use echolocation Mammals described in 1857 Taxa named by Spencer Fullerton Baird