Pangolin Burrow Behaviour in Southern Africa Explained
Burrows are central to pangolin survival. Across Southern Africa, the ground pangolin (Smutsia temminckii) depends on underground refuges for thermoregulation, predator avoidance, and raising young. Understanding how pangolins dig, select, and defend burrows offers critical insight into their ecology and into why habitat loss threatens them so severely.
Why Pangolins Need Burrows
Unlike many armoured animals that rely purely on passive defence, pangolins actively seek shelter. Their scales provide protection once curled, but a pangolin caught in the open is vulnerable to sustained attacks by lions and hyenas. A secure burrow eliminates that exposure. Burrows also solve a thermal challenge: pangolins have very low metabolic rates and struggle to regulate body temperature efficiently. In the Kalahari and Limpopo, where daytime temperatures routinely exceed 38 degrees Celsius, a burrow even one metre underground can remain 10 to 15 degrees cooler than the surface.
Mothers use burrows as nurseries, keeping pups hidden for the first weeks of life. A single pup is born per litter, and the mother leaves it only to forage at night, always returning before dawn. The burrow provides the controlled microenvironment a newborn pangolin requires.
How Ground Pangolins Dig
Ground pangolins are powerful excavators despite their slow appearance. Their front claws, robust, curved, and up to 6 cm long, break compacted soil with ease. The pangolin uses a rocking motion, driving the forelimbs down and back while the muscular tail and hindquarters anchor the body. Loose material is pushed backward with the hindlimbs, building a spoil mound at the entrance.
A pangolin can sink a new burrow of 1.5 to 2 metres in a single night if the soil is sandy loam. In harder clay soils, it more often enlarges or takes over abandoned aardvark or springhare burrows rather than digging from scratch. This dependency on existing excavations in hard-substrate regions means pangolins and aardvarks share a critical ecological relationship: where aardvarks decline, so does suitable pangolin shelter.
Burrow Structure and Depth
Typical ground pangolin burrows follow a relatively simple architecture: a sloping entrance tunnel 20 to 40 cm in diameter, descending at roughly 30 to 45 degrees before levelling into a resting chamber. Depth to the chamber floor ranges from 0.5 metres in loose sand to over 2 metres in firmer ground. Chamber diameter is usually just wide enough for the pangolin to turn around, approximately 40 to 60 cm.
Research finding: Radio-tracking studies in South Africa's North West Province recorded burrow entrance-to-chamber lengths ranging from 1.2 m to 3.8 m, with a mean of approximately 2.1 m. Burrows used repeatedly across seasons tended to be longer and deeper than newly dug sites.
Some burrows have secondary chambers or branching side passages, suggesting modification over multiple visits. Bedding material such as dry grass or leaves is rarely observed. The pangolin relies on its own body heat and the insulating properties of soil rather than nesting substrate.
Home Range and Burrow Rotation
Ground pangolins are solitary and maintain large home ranges. In the bushveld regions of Limpopo, male home ranges can exceed 20 km squared, while females typically occupy 10 to 15 km squared. Within these ranges, individuals use multiple burrows. Some tracking studies have recorded more than 30 distinct burrow sites for a single animal over a monitoring period. This rotation reduces parasite load at any one site and likely confounds predator search patterns.
Burrow reuse varies by season. During winter, when insects are less abundant and cold nights require more thermal shelter, pangolins tend to use burrows more consistently and remain underground for longer periods, sometimes 18 or more hours per day. In summer, when foraging is productive, overnight stays are shorter, and some individuals simply curl beneath dense shrub cover rather than descending underground.
Shared Burrow Use
While pangolins are solitary, burrow sites are sometimes shared sequentially. Camera trap data from private reserves in the Waterberg and Greater Kruger regions shows multiple individuals visiting the same burrow entrance on consecutive nights. This represents resource opportunism rather than social tolerance: a good burrow, once established, is worth revisiting regardless of who dug it.
Mating pairs briefly share burrows during courtship, and a female may allow a male to remain near her burrow for one to three nights around oestrus. After mating, the association dissolves. Males do not participate in pup rearing.
Burrows as Refuge from Predators
A pangolin inside a burrow is exceptionally difficult to extract. The entrance tunnel's narrow diameter prevents most large predators from entering, and the pangolin blocks the passage with its armoured back and tail, creating a plug of overlapping scales. Lions have been observed attempting to excavate pangolin burrows without success, abandoning the effort after 10 to 20 minutes of digging. Only animals capable of substantially widening the tunnel pose a real extraction risk.
The burrow therefore functions as a force multiplier for the pangolin's passive armour. On the surface, a curled pangolin can eventually be rolled to water and drowned by a large predator. Underground, that vulnerability is eliminated entirely.
Threats to Burrowing Habitat
Agricultural expansion, fencing, and overgrazing all reduce burrow availability. Compacted soils on heavily grazed land are harder to excavate and support fewer aardvarks, the primary secondary excavators whose old burrows pangolins rely on. Deep ploughing destroys existing burrow networks. In areas converted to irrigated crops, the soil profile changes fundamentally, eliminating the sandy loam conditions preferred by ground pangolins.
Conservation interventions that protect pangolins must therefore also protect suitable burrowing habitat. Corridor fencing, anti-poaching effort, and translocation programmes all lose effectiveness if the receiving habitat cannot support a sustainable density of usable burrow sites.
Research Methods
Modern burrow behaviour research uses a combination of VHF and GPS radio-collars, camera traps at burrow entrances, and endoscopic cameras lowered into tunnels to observe animals without disturbance. Temperature and humidity loggers placed inside chambers have confirmed the thermoregulatory advantage that burrows provide across seasons. South African programmes coordinated through the Endangered Wildlife Trust's Pangolin Programme have contributed substantially to this dataset over the past decade.
Conclusion
Burrow behaviour is foundational to pangolin ecology. The ground pangolin's ability to dig, locate, and rotate through a network of underground refuges determines its thermal stability, reproductive success, and survival against predation. As land use in Southern Africa intensifies, preserving the soil conditions and ecosystem partnerships that make burrowing possible is as important as any direct anti-poaching measure.