Armadillo is a mammal of the family Armadillidae in the order Heterodontoides. The armadillo is named after the nine layered ribbon on its body. Armadillos are distributed in the southern tip of South America, along the Caribbean coast, and on the Central American continent. Armadillos are burrowing animals that live underground, hiding during the day and coming out at night. They have poor vision but excellent sense of smell and can accurately locate ant nests. Scientists have extracted leprosy bacteriocins from it to produce leprosy vaccines, which has played a great role in promoting human control of leprosy. Moreover, armadillos are easy to domesticate and are one of the precious animals in modern medical experiments.