Pangolins are creatures built almost entirely around a single sense. Where most mammals rely on a combination of sight, hearing and smell to interpret their surroundings, pangolins have evolved to depend on olfaction above all else. Their eyes are small and offer limited resolution. Their ears detect some sound but are frequently sealed shut during feeding. What drives their behaviour, their foraging routes, their territorial awareness and their return journeys home is an extraordinarily refined sense of smell.
Understanding pangolin olfaction helps explain behaviours that might otherwise seem puzzling: why they pause frequently during a nightly foray, why they approach certain patches of ground before digging, and why they follow routes that appear erratic to human observers but are in fact precisely structured around chemical information invisible to us.
The pangolin skull contains a proportionally large olfactory bulb relative to total brain mass. This structure, which processes incoming odour signals, is considerably more developed in pangolins than in many other mammals of comparable body size. The elongated snout that characterises all eight pangolin species houses a dense array of olfactory receptor cells lining the nasal mucosa, giving the animal an exceptional capacity to sample and distinguish between complex chemical mixtures.
Unlike predators that use smell to track fast-moving prey, pangolins are searching for stationary, underground targets. Their olfactory system has evolved for detection accuracy over distance and depth rather than for pursuit tracking. This means pangolins are particularly sensitive to low concentrations of chemical signals that diffuse slowly upward through soil.
Termite colonies and ant nests are not chemically silent. They produce significant quantities of carbon dioxide through metabolic respiration, as well as a complex array of pheromones used for communication within the colony. These compounds diffuse through soil and accumulate in small concentrations at the surface above an active nest. Pangolins appear to detect these gradients and use them to locate nest positions with considerable accuracy.
Field observations of Temminck's ground pangolin (Smutsia temminckii) in southern Africa, including South Africa's Limpopo and North West provinces, show that foraging pangolins frequently slow, lower their snout to the ground and oscillate their head laterally before committing to an excavation site. This scanning behaviour is consistent with an animal using differential odour concentration across space to triangulate a source.
Key fact: Pangolins have been recorded detecting termite colonies buried 20 to 40 centimetres below the surface, through compacted, dry African savanna soil where surface odour concentrations are extremely low.
A pangolin's nightly foray can cover anywhere from one to several kilometres depending on species, season and prey density. During this route, the animal does not simply wander. It moves through its home range following a pattern informed by remembered foraging success and real-time olfactory sampling. When a pangolin pauses and samples the ground, it is running a rapid chemical assessment: is there an active colony below? Is it a termite species worth excavating, or an ant colony that requires a different approach?
Not all ant and termite species are equally palatable or energetically worthwhile. Pangolins learn over time which chemical signatures correlate with productive prey and appear to pass over colonies that are unproductive, too deep, or of less preferred species. This selectivity requires fine-grained olfactory discrimination, not simply gross detection.
Pangolins revisit productive foraging sites across weeks and months. In the Tswalu Kalahari Reserve in the Northern Cape, researchers tracking Temminck's pangolins with GPS units observed that individuals returned to specific nest sites in overlapping nightly circuits, suggesting spatial memory layered over olfactory cues. The combination of remembered location and renewed olfactory confirmation at the site allows a pangolin to efficiently manage its foraging area without exhausting any single termite colony.
This management strategy has direct conservation relevance. Pangolins that are displaced from their home ranges, whether through habitat loss, poaching removals or translocation, lose access to the olfactory landscape they have mapped over months or years. Reintegration into unfamiliar terrain requires reconstructing this map from scratch, a process that imposes significant energy costs during the adjustment period.
Pangolins possess paired anal scent glands that produce a strong-smelling secretion. These glands serve multiple purposes. In defensive contexts, the secretion is deployed to deter predators, functioning similarly to the spray of a skunk. But in everyday life, the same secretion is used to mark territory, signal reproductive status and, crucially, to lay navigational trails.
A pangolin returning to its burrow after a multi-kilometre foray uses a combination of memory and scent trail detection to navigate. Scent posts along familiar paths act as chemical waypoints. This is particularly important in dense bush or uniform grassland where visual landmarks are sparse and unreliable.
Scent marking also facilitates indirect communication between pangolins that share overlapping home ranges. Because pangolins are largely solitary and nocturnal, direct encounters are infrequent. Chemical signals left at marking posts convey information about an individual's presence, sex and reproductive condition without requiring face-to-face interaction. This system allows spacing behaviour to be maintained across a population without constant territorial confrontation.
African context: In South Africa's bushveld and Kalahari environments, where Temminck's pangolin is most commonly found, sparse vegetation and variable soil composition create complex odour landscapes. Pangolins in these environments rely even more heavily on olfactory mapping than those in denser forest habitats.
One of the most remarkable anatomical features of the pangolin is its ability to seal its nostrils and ear canals completely shut. This adaptation becomes essential during feeding. When a pangolin tears open a termite mound with its powerful claws and inserts its long, sticky tongue, it enters an environment full of agitated, biting insects, airborne debris and fine soil particles. Sealing the nasal passages protects the delicate olfactory tissue from physical damage.
The seal is not permanent. As soon as the pangolin withdraws its snout from the excavation to process what it has collected, normal olfactory function resumes. This rapid cycling between sealed and open states means the animal can continue to monitor its immediate environment between feeding bouts, detecting any approaching threat such as a leopard or lion, which are among the pangolin's primary predators in sub-Saharan Africa.
The centrality of olfaction to pangolin survival has important implications for conservation practice. Pangolins rescued from trafficking operations or found injured in the wild cannot simply be released anywhere suitable. Their olfactory-based knowledge of termite colony locations, water sources and safe den sites is site-specific. Successful rehabilitation protocols developed by organisations including the African Pangolin Working Group emphasise soft-release methods, where rehabilitated animals are allowed to gradually explore and build an olfactory map of the release site before full independence.
Understanding how pangolins gather and use olfactory information also informs habitat management. Maintaining the structural complexity of soil communities, specifically the diversity and density of termite and ant colonies, is fundamental to supporting viable pangolin populations. A landscape rich in chemical signals from active insect colonies is a landscape a pangolin can navigate and survive in.
The pangolin's sense of smell is not merely one tool among many. It is the primary interface through which the animal interprets its world. From detecting a termite colony forty centimetres underground, to navigating kilometres of dark savanna back to a burrow entrance, to communicating reproductive status to a distant individual without ever meeting, olfaction underpins every significant aspect of pangolin life. Protecting pangolins means protecting the complex, chemical-rich environments that make their extraordinary sensory abilities meaningful.