The Peruvian tuco-tuco (Ctenomys peruanus) is a species of rodent in the family Ctenomyidae. It is endemic to Peru and Bolivia. This species is classified as critically endangered by the IUCN, due to a very small extant population (< 50 mature individuals as of 2026) and habitat destruction from livestock overgrazing. It is also hunted as both an agricultural pest and for use in traditional medicine.
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