There are approximately 10 extant genera and around 20 extant species of armadillo, some of which are distinguished by the number of bands on their armor. Their average length is about 75 centimeters (30 in), including tail; the Giant Armadillo reaches roughly 90 cm (3 ft), while the Pink Fairy Armadillos are diminutive species with an overall length of 12–15 cm (4–5 in). All species are native to the Americas, where they inhabit a variety of environments. In the United States, the sole resident armadillo is the Nine-banded Armadillo (Dasypus novemcinctus), which is most common in the central southernmost states, particularly Texas.