Pangolin Scent Glands: How These Secretive Animals Communicate

Published: 27 June 2026 • AlphaPanga Research Team

Walk the mopane thickets of Limpopo after dark and the ground pangolin foraging nearby will give almost no audible sign of its presence. Temminck's ground pangolin (Smutsia temminckii), South Africa's sole pangolin species, is among the quietest large mammals in the region. It produces no territorial call, no contact grunt, no song. What it does produce, in abundance, is chemistry. Scent glands, urine deposits and carefully placed faecal accumulations form a communication system so effective that it replaces sound almost entirely across this animal's social world. Understanding how that system works illuminates not only pangolin biology but also why these animals are so extraordinarily difficult to study and protect.

Anatomy of Pangolin Scent Glands

The ground pangolin's chemical arsenal is centred on two distinct glandular systems, both positioned toward the rear of the body where deposits can be applied directly to surfaces during normal movement.

Perineal Glands and Anal Sacs

The primary structures are the perineal glands, a complex of secretory tissue clustered near the base of the tail and surrounding the cloaca. Field researchers working across South Africa, Zimbabwe and Botswana consistently describe the resulting secretion as pungent and musky, detectable by human observers at close range even hours after a pangolin has passed. The secretion is thought to contain a mixture of short-chain fatty acids, sulphur-bearing compounds and other volatile organic molecules that encode information about individual identity, sex and reproductive state.

Flanking the primary perineal cluster are paired anal sac structures. These sacs accumulate a concentrated secretion that can be expelled or pressed against a substrate during deliberate marking. A pangolin rubbing the base of its tail along the rough wall of a termite mound transfers a thin but persistent film that adheres to the porous surface, resists rain and retains detectable volatiles far longer than a liquid deposit on open soil.

How the Secretion Compares to Other Mammals

Superficially the anatomy resembles that of mustelids such as honey badgers and polecats, and the glandular products share a family resemblance to skunk secretions in their sulphur chemistry. The key difference is function. Mustelid anal gland secretions are deployed primarily as a predator deterrent, released explosively under threat. Pangolin secretions serve communication between conspecifics as their primary purpose, and deliberate marking is a calm, methodical behaviour conducted throughout each nightly foraging circuit rather than a crisis response.

Territorial Marking in Ground Pangolins

Male ground pangolins in South Africa's northern bushveld maintain large home ranges, sometimes exceeding 100 square kilometres of mixed savanna, acacia woodland and open grassland. These ranges overlap extensively with those of neighbouring males and with the smaller ranges of several females. Managing such an area without direct confrontation requires a reliable messaging infrastructure, and scent marks serve precisely that role.

Preferred Marking Sites

Marking is not random. Ground pangolins select prominent landscape features that any conspecific moving through the area will approach closely:

• Termite mound walls, which offer a porous, stable surface at a resource all pangolins visit
• The buttress roots and lower trunks of large trees at path junctions
• Exposed boulders and rock outcrops used as navigational landmarks
• Burrow entrances, both active shelters and disused holes along travel routes

In areas where firebreaks and gravel roads cut through the bushveld, pangolins have been documented marking the corner features of these clearings repeatedly, converting human-altered structures into signalling posts.

Patrol Behaviour and Re-marking

Males do not simply deposit a mark and move on. Telemetry data from GPS-collared animals in Limpopo show individuals returning to the same marking sites on successive nights, spending several minutes investigating existing deposits before refreshing them with fresh secretion. This re-marking behaviour is intensified during the dry winter months of June through August, which correspond to the peak mating season. The practical effect is a landscape mapped in chemical ink, updated nightly, that allows any passing pangolin to read who has been where and how recently.

Overlap Zones Between Males and Females

In the bushveld of Limpopo and the private reserves bordering the Kruger National Park, male and female home ranges overlap substantially. This overlap is not random but reflects the distribution of productive termite mound clusters. Overlap zones consequently become the most densely marked areas in the landscape, functioning as neutral ground where chemical information accumulates from multiple individuals. A pangolin entering such a zone can gather social intelligence about several neighbours without ever meeting them.

Scent in Mating and Reproduction

Chemical communication reaches its peak intensity during the annual mating period. Unlike many mammals, ground pangolins have no acoustic mating display, no visual signal and no aggregation site. The entire process of mate location depends on scent.

How Females Signal Oestrus

Females approaching reproductive readiness alter both the quantity and chemical composition of their scent deposits. Urine is placed at a significantly higher rate along the home range in the weeks before ovulation, and hormonal metabolites in the urine reflect the female's endocrine state in detail. Perineal gland secretions similarly change in chemical profile as oestrus approaches, providing a temporally specific signal that indicates not just sex but current reproductive status.

Male Detection and Trail Following

Males are capable of detecting these female signals at considerable distance. Observational data and GPS track analysis from South African field studies show males extending their nightly travel significantly when female scent is detected, deviating from established foraging circuits to follow concentration gradients across open ground. A male may cover an additional two to three kilometres on a single night in pursuit of a scent trail, crossing farm boundaries and drainage lines before locating the female.

Mother-Pup Bonding

After birth, scent plays a different but equally critical role. A ground pangolin pup is born with soft scales and limited mobility. The mother identifies her offspring primarily through olfactory cues, and the pup similarly recognises its mother by scent. This chemical bond persists through the extended period of maternal care, which can last three to four months in South Africa, during which the pup rides on the mother's tail during nightly foraging excursions. Disruption of this scent-mediated bond during rehabilitation, when pangolins are handled by multiple people and housed in unfamiliar environments, is one of the significant challenges facing rescue centres in the country.

Urine and Faecal Deposits as Communication

Glandular secretions form the richest channel of chemical communication, but urine and faeces are by no means passive waste products. Both are deposited deliberately and in patterns that make biological sense only as intentional signalling.

Latrine Sites as Information Hubs

Ground pangolins in well-studied areas of Limpopo and the North West province establish persistent latrine sites at or near range boundaries and major foraging areas. These are not casual deposition points but repeatedly used locations visited over weeks or months, creating a concentrated accumulation of chemical information. A latrine at the edge of a territory functions as both a declaration of occupancy and a detailed profile of the depositing animal.

What the Signals Convey

Laboratory analysis of pangolin faecal and urinary compounds, where samples have been obtained from captive or recently handled wild animals, indicates that chemical signals encode a surprising range of information:

• Sex, distinguishable by hormone metabolite ratios
• Age class, reflected in metabolic byproduct profiles
• Reproductive status, particularly the oestrus signals described above
• Individual identity, through unique combinations of volatile compounds
• Diet and recent foraging activity, detectable from insect cuticle breakdown products

A pangolin reading a latrine site is therefore accessing a multi-layered record of recent activity in the area, far more informative than any acoustic signal of comparable duration.

Do Pangolins Vocalise at All?

The short answer is yes, but rarely and in limited circumstances. Ground pangolins are not entirely mute, but the sounds they produce are reactive rather than communicative in the social sense.

Defensive Sounds

When cornered by a predator or handled by a person before it can roll into a defensive ball, an adult pangolin may produce a short, sharp hissing exhalation. Some individuals add a deeper, rhythmic puffing sound as they tuck their head under the tail. These sounds are believed to be incidental to the muscular effort of rolling rather than deliberate signals, but they may function incidentally as a startle response to predators.

Pup Distress Calls

Young pups separated from their mothers produce a thin, high-pitched call that elicits retrieval behaviour. This contact call appears to be the one reliable vocalisation in the species' repertoire used intentionally for social communication, and it disappears as the pup matures and becomes capable of following its mother without auditory cues.

Why Scent Dominates Over Sound

For a solitary nocturnal animal with large home ranges and few encounters between adults, acoustic communication offers poor returns on investment. Sound requires both sender and receiver to be simultaneously active. A call loud enough to carry across several kilometres of open bushveld broadcasts to every predator in the same radius. And a sound leaves no lasting trace: once it fades, so does the message. Scent marks do none of these things. They persist for days without refreshing, carry no predator-attracting broadcast, and can be read by any individual that passes the site at any point during the deposit's active life. For the ground pangolin's ecological niche, chemistry is simply a more efficient medium.

Research Challenges

Despite the centrality of chemical communication to pangolin social life, very little of it has been studied in controlled conditions. The reasons are practical and formidable.

The Difficulty of Studying a Nocturnal, Cryptic Species

Ground pangolins are active between dusk and dawn, move through dense vegetation, actively avoid observers and show rapid behavioural disruption when followed on foot with lights. Direct observation of marking behaviour by field workers is rare, and most published accounts rely on short sequences captured incidentally rather than systematic sampling. The chemical compounds themselves require collection of physical samples from marking sites, which must then be analysed in a laboratory equipped for volatile compound chromatography. Facilities capable of this work are limited in southern Africa.

Camera Traps and GPS Collars

The most productive research tools in South African pangolin studies have been infrared camera traps positioned at known scent stations and GPS collars fitted to wild-caught animals. Camera traps confirm revisitation patterns, document the duration of marking events and occasionally capture interactions between individuals at shared sites. GPS collar data reveal the spatial structure of home ranges and the intensification of movement during the mating season, providing strong indirect evidence of chemical communication even when the chemistry itself cannot be sampled.

Collar-based studies in Limpopo and the North West province have identified individual animals with highly consistent marking circuits spanning dozens of kilometres, suggesting that chemical communication shapes landscape use in ways that persist across seasons and years. Expanding this work to larger sample sizes remains difficult because of the low population density of the species across its South African range and the logistical demands of capturing, collaring and tracking animals in remote bushveld terrain.

The ground pangolin conducts its social life in a language that human senses can barely detect. Across the Limpopo valley, the mopane woodlands and the sandy plains of the North West province, an invisible chemical conversation unfolds each night on termite mound walls and tree trunks, carrying information about territory, reproduction and identity through a medium that has served this lineage for tens of millions of years. Decoding that conversation more fully is not merely an academic exercise. It is a prerequisite for understanding how pangolin populations are structured, how individuals move across fragmented landscapes and what disruptions, from poaching to habitat loss, mean for the chemical web that holds pangolin society together. For related reading, see our articles on pangolin mating and reproduction and pangolin rehabilitation in South Africa.