Southern Naked-tailed Armadillo

Fascinating facts about the Southern Naked-tailed Armadillo

• A single armadillo can dig a burrow 25 metres long in one night, using claws so powerful they can tear through tree roots — yet this species is so secretive that scientists didn't figure out what it actually eats until the 1980s. When researchers finally trapped one and examined its stomach, they found it specialises in a single prey: leaf-cutter ants. It can consume 500 ants in a single feeding session by ramming its long sticky tongue into their nests. This hyper-focus on one food source makes it incredibly vulnerable to drought.
• The 'naked tail' isn't actually naked — it's covered in skin so thin you can see blood vessels running through it, making it a living thermometer. Armadillos can't regulate body temperature like other mammals, so they use this tail to shed excess heat in the tropical sun or conserve warmth in cool burrows. When stressed, the tail flushes bright pink as blood rushes to the surface — a panic response that costs them precious energy.
• Their armour plates grow continuously throughout life, shedding and regrowing like an exoskeleton, and they can hold their breath for up to 6 minutes underwater. During floods common in tropical dry forests, they survive by walking along the bottom of rivers rather than swimming, using their armoured shell as ballast. This ability has changed little in 60 million years.
• Unlike the nine-banded armadillo famous for rolling into a ball, this species is built like a tank — squat, heavy, and immovable. When threatened, it braces all four legs and lowers its body to the ground so tightly that a predator cannot flip it. A jaguar or puma can wound it but rarely succeeds in turning it over to access the soft underside.
• They are one of the few armadillo species to be truly solitary, with zero tolerance for other individuals outside breeding season — males and females only meet to mate once yearly. They communicate entirely through smell, leaving chemical messages at burrow entrances and marking territories up to 3 square kilometres in size. In a rainforest crowded with armadillos, these animals have carved out a life of total isolation.

At a glance

About the Southern Naked-tailed Armadillo

In the warm, golden light of a South American evening, the Southern Naked-tailed Armadillo emerges, its armor-plated shell glistening like polished leather as it rooting through the underbrush with an air of quiet determination. With a curious, snout-led gait, it moves through the world, its long, pointed snout twitching as it uncovers hidden insects and sweet, buried treasures. As it digs and snuffles, its naked tail twitches back and forth, a metronomic counterpoint to the rustling of leaves and snapping of twigs that accompany its nocturnal wanderings.

Discover more wildlife