Moles are small ovular mammals that tunnel and dwell underground in a series of runways and burrows. They are typically eyeless, although some may have small, almost useless eyes. Moles are typically 5 to 9 inches in length, and have velvety brown to gray hair. They are particularly adaptable to suburban lawns, as it is usually soft and moist (easy to dig through), and has an abundance of food sources. Their diet ranges from small invertebrates found in the soil to different nuts that fall from trees. In some cases, a mole may be beneficial to lawns because it consumes worms and insects in the soil and in turn fertilizes the area it resides in. In other cases, a mole can produce sickly looking lawns full of gaps, trails, and entry holes.