The Giant Ground Pangolin: Africa’s Largest and Most Elusive Scaled Mammal

The giant ground pangolin (Smutsia gigantea) holds two uncomfortable records. It is the largest pangolin species on Earth — adults stretch up to 1.8 metres and weigh up to 33 kg — and it is one of the least understood large mammals in Africa. Strictly nocturnal, solitary, and sparsely distributed across Central and West African forests, it has evaded systematic scientific study for centuries. What little we know comes from a handful of camera trap surveys, a pioneering project in Uganda, and a couple of lucky rediscoveries.

Anatomy of a Giant

The giant ground pangolin is unmistakable among its relatives. While the other seven pangolin species range from small (the long-tailed pangolin at under 3 kg) to medium (Temminck’s ground pangolin at up to 18 kg), S. gigantea dwarfs them all. Its body is covered in large, dark brown keratin scales arranged in overlapping rows, and like all pangolins, it curls into a defensive ball when threatened.

The three central claws on each forefoot are massively enlarged and curved outward, designed for excavating termite mounds and digging sleeping burrows. The first and fifth digits are reduced, creating a specialised digging apparatus unmatched among pangolins.

Its tongue can extend up to 40 cm, with a diameter of approximately 0.5 cm. Unlike most mammals, the tongue anchors near the pelvis, not the mouth, allowing for extraordinary extension. Viscous saliva secreted from glands in the abdomen coats the tongue before it darts into termite chambers, trapping insects by the thousands. The sensitive tip serves as a tactile sensor, allowing the animal to navigate tunnels and detect prey through touch.

Range and Habitat

The giant ground pangolin inhabits tropical forests and forest-savanna mosaics across Central and West Africa. Its confirmed range includes Cameroon, the Democratic Republic of Congo, Republic of Congo, Gabon, Central African Republic, Uganda, Equatorial Guinea, and parts of Nigeria. The species favours dense lowland forests with access to termite and ant colonies, typically spending the day in large self-excavated burrows or resting under piles of vegetation and fallen tree roots.

Until recently, the eastern limit of the species’ range was thought to extend only to central Uganda and western Tanzania. That assumption was overturned when three spatially separate camera trap records confirmed the giant ground pangolin in Kenya, representing a significant range extension. The records, published in Oryx, demonstrated that the species persists in areas where it had been considered absent.

Rediscovery in Senegal

At the north-western edge of its range, the giant ground pangolin had not been recorded in Senegal for 24 years. In March 2023, a field team from Panthera and the Senegalese national parks directorate systematically surveyed Niokolo-Koba National Park with camera traps. They photographed a giant ground pangolin — the first confirmed record in the country since the late 1990s.

Alongside the pangolin, the survey identified 44 additional wildlife species, including rare West African lions. The rediscovery underscored a critical conservation lesson: absence of records does not mean absence of the species. Systematic biodiversity surveys in protected areas can reveal populations of elusive species that persist undetected for decades.

Research Breakthroughs

The Chester Zoo Giant Pangolin Project

Launched in 2018 in collaboration with the Uganda Wildlife Authority, the Giant Pangolin Project led by Chester Zoo was the first conservation research programme in the world to focus specifically on the giant ground pangolin. The team achieved a world first by fitting a radio tracking device to a wild giant pangolin, enabling the first systematic data on the species’ movements, home range, and habitat preferences.

Researchers learned to identify individual pangolins by their unique scale patterns — analogous to fingerprints in humans. Combined with camera traps, this technique has revealed information about activity patterns and site fidelity that was previously unknown.

AI-Powered Monitoring

Chester Zoo’s collaboration with Liverpool John Moores University has deployed Conservation AI, a machine learning platform with nearly 99 percent accuracy, to process camera trap data in real time. On the first night of deployment in Uganda, the system captured video of a giant pangolin and sent an email alert to researchers within four minutes of detection.

This technology transforms the economics of pangolin research. Instead of manually reviewing thousands of hours of footage — a process that can take months — AI systems identify species, flag individual animals, and could eventually detect signs of injury such as snare wounds or even the presence of poachers near camera locations.

Camera Traps in Cameroon

A 2018 study by Bruce and colleagues in the Dja Biosphere Reserve, Cameroon, tested the efficacy of targeting known burrow sites for camera trap surveys. Using knowledge from local Ba’Aka guides, the team deployed nine cameras on potential giant ground pangolin burrows. One camera photographed an adult male using a burrow within two days of deployment, and the animal returned to the same burrow over a 25-day period. Possible scent-marking behaviour was also recorded.

Conservation Status and Threats

The IUCN upgraded the giant ground pangolin from Vulnerable to Endangered based on declines in area of occupancy, habitat quality, and inferred population losses from exploitation. The three-generation assessment period spans 45 years.

Three threats drive the decline:

• Forest loss — identified as the most severe threat. Logging, agricultural expansion, and infrastructure development fragment the continuous forest habitat that giant pangolins require.
• Local exploitation — the species is hunted for bushmeat and its scales are used in local traditional medicine across its range.
• Intercontinental trafficking — scales are harvested in Central and West Africa and shipped to Asia. Between 2015 and 2019, the equivalent of more than 400,000 African pangolins were trafficked, with the giant ground pangolin among the species targeted.

All eight pangolin species were transferred to CITES Appendix I in 2016 (effective January 2017), banning all commercial international trade. Despite this protection, enforcement remains challenging across the giant ground pangolin’s vast, often poorly policed range.

What Remains Unknown

The list of unknowns about the giant ground pangolin is longer than the list of knowns. No reliable population estimate exists for any part of its range. Reproduction in the wild is virtually undocumented — gestation period, inter-birth intervals, and pup survival rates are inferred from other pangolin species rather than observed directly. The full extent of its geographic range is still being mapped, as the Kenya and Senegal discoveries demonstrate.

The 2024–2025 IUCN Pangolin Specialist Group report emphasised that a lack of data and reporting gaps hamper global conservation efforts. For the giant ground pangolin, every new data point — every camera trap image, every GPS fix, every burrow survey — fills gaps that have persisted for decades. The species is a reminder that some of Africa’s most remarkable animals are still waiting to be properly understood.