the american pygmy shrew is the smallest mammal native to north america. its is about 5 cm (2 in) long. it weighs about 2.0 to 4.5 g (0.07 to 0.16 oz). its fur is reddish or grayish brown during the summer. it is white-gray during the winter. it molts about two times a year. it has a narrow head with a pointed nose, and whiskers. the eyes are small.