Pangolins as Ecosystem Engineers: Nature's Termite and Ant Controllers
When most people think of ecosystem engineers, they picture elephants knocking down trees or beavers building dams. Pangolins rarely enter the conversation — yet these small, scaly mammals perform ecological services that are quietly essential to the health of forests, savannas, and grasslands across Africa and Asia.
A single pangolin can consume up to 70 million ants and termites each year. At that scale, pangolins are not merely consumers. They are regulators — keeping insect colonies in check, turning over soil, and shaping the conditions that allow other species to thrive.
What Is an Ecosystem Engineer?
Ecologists define ecosystem engineers as species that physically modify their environment in ways that create, maintain, or destroy habitat for other organisms. There are two types: autogenic engineers, which alter the environment through their own physical structure (think corals or oysters), and allogenic engineers, which change the environment through their behaviour.
Pangolins are allogenic ecosystem engineers. Their foraging behaviour — digging into termite mounds, excavating ant nests, burrowing into soil — alters the physical landscape in ways that benefit dozens of other species. Their impact is subtle but measurable, and growing evidence suggests that removing pangolins from an ecosystem causes cascading consequences.
Termite and Ant Control: The Numbers Matter
Termites and ants are among the most abundant insects on Earth. They play vital roles in decomposition and nutrient cycling, but unchecked populations can destabilise ecosystems. In agricultural areas, termites damage crops, destroy timber, and undermine building foundations. Ants can displace native species and — in some cases — reduce plant regeneration.
Pangolins feed almost exclusively on ants and termites, using their powerful foreclaws to break open mounds and their long, sticky tongues to extract insects at extraordinary speed. Research on Temminck's ground pangolin (Smutsia temminckii) in South Africa suggests that an adult individual can consume between 150,000 and 200,000 insects in a single night's foraging.
Extrapolated across a year, one pangolin removes roughly 70 million insects from the environment. In areas where pangolin populations are dense, this predation pressure keeps ant and termite colonies from reaching ecologically disruptive densities. Where pangolins have been removed — through poaching or habitat loss — insect populations have expanded, sometimes with negative consequences for agricultural land adjacent to natural areas.
Soil Aeration and Nutrient Cycling
The ecological contribution of pangolins extends beneath the surface. When a pangolin digs into a termite mound or excavates a burrow, it turns over soil and exposes new material to air and water. This process, sometimes called bioturbation, improves soil porosity and supports microbial communities that underpin plant growth.
Termite mounds themselves are extraordinarily nutrient-rich structures. The mounds contain elevated levels of nitrogen, phosphorus, and potassium — nutrients that plants require. When pangolins break open these mounds and the colony disperses, these nutrients become more broadly available in the surrounding soil. Research conducted in Kruger National Park found that vegetation near frequently disturbed termite mounds was measurably more productive than vegetation in areas where mounds remained intact for extended periods.
Pangolin burrows also provide secondary habitat. After a pangolin abandons a burrow, it is quickly colonised by other species — including warthogs, porcupines, mongooses, monitor lizards, and various bird species. In some landscapes, pangolin burrows are among the most commonly used secondary burrow sites available to medium-sized mammals. This makes pangolins what ecologists call a keystone species in the truest sense: remove them, and the structure of the community begins to shift.
The White-Bellied Pangolin in Forest Ecosystems
The white-bellied pangolin (Phataginus tricuspis), the most arboreal of Africa's four pangolin species, performs a slightly different but equally important ecological role. Foraging in the canopy and understory of Central and West African forests, it targets tree-dwelling ant and termite colonies that ground-foragers cannot reach.
These tree-living insects are major consumers of leaf litter and decaying wood — processes critical to the forest carbon cycle. By controlling these populations, the white-bellied pangolin helps regulate the rate of decomposition and nutrient release in forest soils. Some researchers have proposed that the extirpation of tree pangolins from large sections of the Congo Basin — driven by bushmeat hunting and the live trade — may be a contributing factor in subtle shifts in forest floor composition observed over recent decades.
The Asian Species: Overlapping Roles
Asia's four pangolin species — Sunda (Manis javanica), Chinese (Manis pentadactyla), Indian (Manis crassicaudata), and Philippine (Manis culionensis) — fulfil comparable roles in their respective ecosystems. Studies in Malaysia and India have documented the relationship between pangolin activity and reduced structural pest damage in mixed-use landscapes bordering agricultural zones.
Farmers in parts of Assam and Manipur, India, have long recognised that areas where pangolins forage tend to experience less termite damage to crops and storage structures. This traditional ecological knowledge is now finding support in formal research, with studies documenting inverse correlations between pangolin activity and termite colony density in buffer zones between forests and farmland.
Quantifying the Economic Value
Conservation economists have begun to attach monetary values to the pest control services pangolins provide. One framework, published in a 2023 review of insectivore ecosystem services, estimated that the pest suppression value of a single Temminck's ground pangolin over its 10-to-20-year lifespan could exceed USD 50,000 — a figure that dwarfs the black-market value of the animal's scales and meat.
This economic framing has become an important advocacy tool. Presenting pangolins purely as conservation icons generates sympathy but rarely changes policy. Demonstrating that a live pangolin patrolling a farmer's boundary is worth more than a dead one in a poacher's bag makes the economic logic of protection far more concrete.
The Cascading Effect of Pangolin Loss
The Zoological Society of London's EDGE programme has documented what happens in areas where pangolin populations collapse. Termite mounds increase in size and density. Ants expand their territory. Secondary burrowing species lose habitat. Soil compaction increases as bioturbation declines. Plant communities shift toward species more tolerant of dense ant disturbance.
None of these changes is catastrophic in isolation. Together, they represent a measurable degradation of ecosystem function — the kind of slow-motion unravelling that is difficult to reverse once it has reached a tipping point.
Protecting Ecosystem Engineers
The most effective way to preserve the ecological services pangolins provide is to protect the pangolins themselves. This means stronger anti-poaching enforcement, habitat protection, community-based conservation programmes that give local people a financial stake in live pangolins, and continued reductions in demand for pangolin products in consumer markets.
Research also points to the value of landscape connectivity. Pangolins are wide-ranging foragers; a single individual may patrol a home range of several square kilometres. Fragmented habitats restrict this movement, reducing the geographic footprint of their ecological impact. Maintaining and restoring corridors between protected areas is essential to allowing pangolins to fulfil their role as ecosystem engineers at meaningful scales.
Frequently Asked Questions
Q: How many termites does a pangolin eat per year?
A single adult pangolin can consume approximately 70 million ants and termites per year, depending on species and habitat.
Q: Why are pangolins called ecosystem engineers?
Pangolins modify their environment through foraging — breaking open termite mounds, aerating soil, and creating burrows that dozens of other species use as secondary habitat.
Q: What happens to an ecosystem when pangolins disappear?
Termite and ant populations increase, soil bioturbation declines, secondary burrowing species lose habitat, and plant community composition can shift over time.
Understanding pangolins as ecosystem engineers rather than simply as victims of the wildlife trade reframes the urgency of their protection. Their loss would not just be a tragedy for a remarkable species — it would mean the loss of ecological services that billions of insects, hundreds of plant species, and dozens of mammal and reptile species depend upon. The savanna, the forest, and the farm boundary all function a little better when a pangolin is foraging through them at night.