Shrews are small mammals, very similar in size to mice. In terms of build, they are almost a combination of a mouse and a mole. Like moles, they do not have a well-defined head and have a small pointed snout. The rest of their body is mouse-like in appearance. They are usually charcoal or black in color but can have a brownish hue. Also like moles, their eyes are small and ineffective, but they have a strong sense of hearing and smell.
The biggest difference between shrews and mice are their teeth. Unlike mice, whose teeth grow throughout their life, a shrew’s teeth do not grow after birth and, as a result, get worn down over time. They lack the gnawing front teeth of mice and instead have small, spike-like teeth. These spike-like teeth are used to munch on seeds, nuts, and insects. Shrews have a large appetite, caused in part by the fact that they have a surprisingly fast metabolism. They can eat 90% of their body weight in food in one day!