A small, burrowing rodent native to the sandy coastal plains and grasslands of Argentina, particularly along the Buenos Aires Province. Belonging to the genus Ctenomys—a diverse group of South American rodents collectively known as tuco-tucos—this species is famous for its underground lifestyle, powerful digging abilities, and the distinctive “tuc-tuc” drumming sound it makes beneath the soil, which gives the entire genus its name. Though it spends nearly all its life hidden from view, the southern tuco-tuco is an essential part of the ecosystems it inhabits, shaping the very land it lives beneath.

Physically, the southern tuco-tuco is a robust, cylindrical rodent with a body that is covered in soft, velvety fur, usually a golden or reddish-brown color, blending perfectly with the sandy soils of its habitat. Its head is broad and flat, with small eyes and ears—adaptations for a subterranean life—and its forelimbs are short but immensely strong, ending in long, curved claws for digging. Its incisors are large and protruding, and unlike most rodents, it often digs with its teeth as well as its claws, allowing it to carve tunnels through compact soil. The shape of its skull and powerful jaw muscles give it a strong bite, making it one of the most efficient diggers among South American rodents.

The southern tuco-tuco is a strictly subterranean species, spending almost all its time in complex burrow systems that it excavates and maintains throughout its life. These burrows can be several meters long, with multiple tunnels, chambers for nesting and food storage, and separate entrances for ventilation. The tunnels are often located in coastal dunes and loose sandy soils, where the tuco-tuco’s digging helps prevent erosion and encourages plant growth by aerating and mixing the soil. Each individual usually maintains its own burrow, and tuco-tucos are highly territorial, defending their underground homes through a combination of vocalizations and physical confrontations.

Distribution

Country

Population est.

Status

Year

Comments

Argentina

EN

2016

Buenos Aires