Tuco-tuco
 The tuco-tuco is a neotropical rodent in the family Ctenomyidae. The tuco-tucos belong to the only living genus of the Ctenomyidae family Ctenomys but they include approximately 60 different species. The common name tuco-tuco comes from the tuc-tuc sound they make while they dig their burrows.The relationships among the species are debated by taxonomists.