Pangolin Communication: Vocalisation and Sound Guide

Published: 29 June 2026 • AlphaPanga Research Team

In the animal kingdom, communication tends to be loud, visible and persistent. Birds call at dawn. Lions roar across kilometres of open savanna. Frogs fill warm evenings with overlapping choruses. The pangolin does none of this. Walk within arm's reach of a foraging Temminck's ground pangolin in the South African bushveld and you may hear nothing at all: no alarm call, no territorial advertisement, no contact note to a nearby individual. What the animal is doing instead, and how it manages an entire social and territorial existence on that basis, is the subject of this guide.

Why Pangolins Are Among the Quietest Mammals on Earth

To understand pangolin communication, it helps to start with the question of what communication is for. In a social species, vocal signals coordinate group movement, warn companions of danger, establish dominance hierarchies and maintain pair bonds. A herd of impala that cannot communicate alarm is a herd that cannot respond to a predator as a unit. A troop of baboons that cannot vocalise cannot negotiate status. For social animals, sound is not optional.

Pangolins, by contrast, are thoroughly solitary. Outside of the mating encounter and the mother-pup bond, a wild pangolin in South Africa lives without sustained social contact. Adjacent home ranges may overlap, but the animals that share those ranges generally avoid simultaneous use of the same ground. Where social contact is rare and brief, the evolutionary pressure to develop a complex vocal system is weak, and pangolins have invested that developmental budget elsewhere: in the olfactory system, in chemical glands, and in physical defences that need no acoustic component.

The laryngeal anatomy of pangolins reflects this history. Unlike the large, muscular larynx of a cat or primate that can modulate pitch and duration across a wide acoustic range, the pangolin's larynx is structurally simplified. It can move air across the glottis to produce sound under high respiratory pressure, but the fine motor control required for complex vocalisation is absent. The result is an animal that, across a normal foraging night of four to six hours, produces no acoustic output detectable above ambient noise.

The Sounds Pangolins Do Make

Hissing Under Threat

The hiss is the most consistently documented pangolin vocalisation. It occurs when the animal is cornered, handled, or approached so closely that it cannot flee but has not yet committed to the full defensive ball. The sound is generated by forcing a controlled flow of air through the partially constricted glottis, producing a sustained, sibilant exhalation that can last several seconds. Field rangers and wildlife veterinarians working with Temminck's ground pangolin in South Africa's Limpopo and North West provinces describe the hiss as clearly audible at distances of one to two metres but difficult to detect beyond that range, particularly against a background of wind or insect noise.

The hiss is accompanied by postural signals: the body arches, the scales at the flanks lift slightly, and the snout tracks the threat. Together these elements form a warning display that signals the animal's awareness and readiness to escalate to full ball defence. Whether the hiss functions primarily to deter the threatening individual, to express physiological arousal, or both, has not been established experimentally.

Puffing and Snorting

Shorter, more percussive exhalation sounds have been recorded from pangolins subjected to direct physical contact, particularly during veterinary handling and rehabilitation assessments at South African centres. These sounds, variously described as puffs, snorts or grunts, appear linked to tactile rather than visual or olfactory threat. An individual may hiss when approached and then shift to repetitive puffing once contact is made. The acoustic profile of these sounds, their duration, frequency range and intensity, has not been formally characterised in the published literature, a gap that reflects the broader challenge of conducting controlled acoustic experiments with a species that is rare in captivity and nocturnal in the field.

Juvenile Chirps and the Mother-Pup Bond

Pangolin pups are born singly after a gestation period of approximately 140 days. In the first weeks of life they are mobile but highly dependent and must maintain close contact with the mother to nurse, thermoregulate and travel. In this context, sound does what scent cannot: provide a real-time location signal that works in the dark over short distances without requiring the receiver to be moving toward a gradient.

Pups produce soft, high-pitched chirps and squeaks that function as contact calls. The calls intensify when the pup is separated from the mother and cease quickly on reunion. Carers at South African pangolin rehabilitation facilities have documented this pattern in detail, noting that pups vocalise persistently when isolated in an enclosure and fall silent within seconds of physical contact with a carer or surrogate. The mother, in turn, produces low, murmuring vocalisations during nursing and grooming, a softness of sound that is almost entirely absent from adult behaviour outside this one context.

This juvenile vocal window is significant. It is the only life stage at which a pangolin's acoustic output is rich enough to be recorded reliably in a rehabilitation setting, and it offers researchers their best opportunity to characterise the species' vocal anatomy and the acoustic structure of pangolin sounds. The calls diminish progressively as the pup ages, and by the time it begins independent foraging at six to twelve months, it has adopted the near-silence of the adult.

Chemical Communication: Scent Glands and Territorial Signalling

What pangolins do not say with sound, they say with chemistry, and at a level of sophistication that arguably exceeds the acoustic communication of many more vocal species. The chemical channel operates across time rather than in real time: a scent mark deposited on a tree root at midnight is still legible to the next animal that passes twelve hours later, carrying information about the depositor's identity, reproductive state and territorial claim without requiring any simultaneous presence.

Anal Gland Secretions

The anal glands are the primary instrument of territorial advertisement. They produce a musk of notable intensity, detectable to trained field rangers without instruments, that is deposited by pressing the cloaca against a substrate. Ground pangolins in South Africa show strong site fidelity in their scent-marking behaviour, returning to the same prominent landmarks on successive foraging nights. Termite mound walls, exposed rock surfaces, and the bases of large trees at path junctions are favoured marking sites. The selection of these locations is not random: they are points that any individual moving through the territory is likely to encounter, maximising the signal's reach within the home range.

Where the territories of two individuals overlap, GPS collar data from South African study populations show that fresh marks are deposited over existing ones, a behaviour consistent with the territorial over-marking seen in other solitary carnivores and insectivores. The chemical complexity of these secretions, which includes mixtures of short-chain fatty acids, sulphur compounds and other volatiles, provides enough information for a receiving animal to assess the depositor's identity, approximate age and potentially its reproductive readiness.

Urine Deposition as Reproductive Signalling

Urine is deposited at specific sites along foraging routes rather than voided continuously, a pattern consistent with intentional signal placement. In females approaching oestrus, the volatile compound profile of urine changes in ways that males can apparently detect at distances large enough to explain the extended range movements that male ground pangolins make during the mating season in southern Africa. This chemical advertisement removes the need for any acoustic broadcast and allows a solitary female to signal her reproductive state to potentially distant males without the vulnerability that loud calling would entail.

Scratch Marks and Physical Territorial Signals

Pangolins leave a third category of territorial signal that occupies a middle ground between chemical and visual communication: physical scratch marks and digging traces. A ground pangolin excavating a termite mound leaves behind a distinctive pattern of claw marks on the mound surface that is recognisable to experienced field researchers as pangolin-specific. These marks persist long after the animal has moved on and can serve as a record of use that communicates the territory's occupancy to subsequent visitors.

More deliberate scratch marks on soft bark or at burrow entrances have been observed in several South African populations. Whether these serve primarily as visual signals to conspecifics, as olfactory anchors where gland secretions from the feet are deposited, or simply as incidental digging residue is not fully resolved. What is clear is that the physical landscape of an occupied ground pangolin territory carries a record of the occupant's activity that supplements the chemical record and potentially provides redundant signals to any animal capable of reading both channels.

Visual Signals: The Defensive Ball and Posture

The pangolin's most famous behaviour, the curl into a ball of overlapping keratin scales, is commonly described as a purely mechanical defence. It is also a communicative act. When a pangolin curls fully, it is transmitting a clear and unambiguous signal: maximum threat has been assessed, all flight options have been abandoned, and the animal has committed entirely to passive armoured resistance. The strong tail muscles that clamp the ball shut add a further signal of commitment, making it clear to any investigator that the ball will not be passively unrolled.

Predators in South African reserves, including leopard and spotted hyena, have been observed testing balled pangolins for periods of several minutes before disengaging. The disengagement appears to be a response to the unchanging nature of the signal rather than to any active escalation by the pangolin. A balled animal that does not hiss, scratch, bite or change shape provides no new information and ultimately fails to reward continued investigation. This communicative stability, sending the same unwavering signal regardless of the predator's behaviour, is the ball's most powerful property.

Comparison with Other Solitary Nocturnal Mammals

Placed alongside other solitary nocturnal mammals, the pangolin's communication profile is recognisable but extreme. The aardvark (Orycteropus afer), which shares much of the same South African habitat and fills a broadly similar ecological niche, is similarly non-vocal in its foraging but produces grunting and snuffling sounds during social encounters and can grunt when alarmed. The African civet (Civettictis civetta) relies heavily on scent marking through a large perineal gland, as pangolins do, but supplements this with a repertoire of calls including a distinctive cough-spit alarm that carries across several hundred metres.

The pangolin's near-total acoustic silence is unusual even in this peer group. The closest parallel in terms of communication strategy is perhaps the giant anteater of South America, another solitary myrmecophage, which is similarly sparse in its vocal output and relies heavily on chemical and visual signals. This convergence between two unrelated species that share a diet of social insects and a solitary lifestyle suggests that the communication strategy may be driven not by shared ancestry but by shared ecology: when an animal is solitary, nocturnal and unlikely to benefit from broadcasting its location, silence is a viable and efficient choice.

What Acoustic Monitoring Has Taught Researchers

The deployment of autonomous recording units in wildlife monitoring has transformed conservation biology over the past decade, enabling researchers to survey for species through their vocal signatures without any direct animal contact. For most species this approach is productive: bats, frogs, birds and many large mammals all produce distinctive sounds that a passive recorder can capture and an algorithm can identify. For pangolins, the results have been instructive in a different way.

At South African study sites where ground pangolins are known to be present from GPS collar data and direct observation, autonomous recorders have captured almost no pangolin-attributable acoustic events during hundreds of recording-nights. This negative result is itself scientifically meaningful: it confirms that passive acoustic monitoring is not a viable primary survey method for this species and that the near-silence documented in captivity and during direct observation reflects the animal's genuine acoustic output in free-ranging conditions rather than a behavioural artefact of human presence.

The practical implication for conservation is significant. Survey programmes designed to establish pangolin presence or abundance in an area cannot rely on the acoustic tools that work well for other nocturnal mammals. Camera traps, scent station surveys, tracking by experienced rangers and GPS telemetry remain the methods of choice. The development of detection dogs trained to locate pangolin scent marks has also shown promise in South Africa, exploiting the animal's chemical richness where its acoustic profile offers nothing to detect.

The most important finding from acoustic pangolin research to date may be the confirmation that there is almost nothing to find: a species this silent demands surveillance tools built around what it does produce, not what it does not.

Future research directions include high-sensitivity microphone arrays that might capture sub-threshold low-frequency sounds during close encounters, and the chemical characterisation of scent mark profiles to determine whether individuals can be identified and tracked through their chemical signatures alone. Both approaches build on what acoustic monitoring has established: that communication in pangolins runs on a channel that most monitoring infrastructure is not yet calibrated to read.