Pangolins in Zoos: Challenges of Captive Care Worldwide
Pangolins hold the unwelcome distinction of being the most heavily trafficked mammals on Earth. As wild populations decline under relentless poaching pressure, zoos have attempted to maintain pangolins in captivity for research, breeding and public education. The results have been mixed. This article examines the troubled history of pangolins in zoos, recent advances at pioneering institutions, and the ethical questions that continue to surround captive pangolin programmes.
A Troubled History: Early Failures and High Mortality
Pangolins first appeared in zoo records in the 1950s. The results were dismal. Most captive pangolins died within weeks or months, succumbing to malnutrition, stress-related illness and secondary infections. An analysis of 296 pangolins held in zoos from 1954 onward found that early captive lifespans were extremely short. Indian pangolins (Manis crassicaudata) fared particularly badly, with studies documenting mortality rates as high as 67% within the first year.
It was only from the late 1990s onward that advances in enclosure design, thermal management and diet formulation gradually pushed captive survival times upward, though success remained confined to a few dedicated facilities.
Dietary Challenges: Replicating a Specialised Diet
In the wild, pangolins are obligate myrmecophages, feeding almost exclusively on ants and termites. A single pangolin may consume tens of thousands of insects per night. Zoos cannot feasibly supply this volume of live prey, so facilities have experimented with substitute formulas incorporating minced meat, eggs, insectivore pellets, bee larvae, silkworm pupae, psyllium husk and vitamin supplements. Early formulas were often nutritionally incomplete and poorly accepted.
A key difficulty lies in palatability. Pangolins locate food through scent and are highly selective. Many captive individuals refuse artificial diets outright, particularly in the stressful early weeks after arrival. Even when animals accept a substitute, gastrointestinal problems are common, as their muscular, gizzard-like stomachs are adapted to grinding whole insects rather than processed food.
Research led by Taipei Zoo and Brookfield Zoo Chicago has significantly improved captive nutrition. Brookfield developed a specialised diet incorporating chitin-rich insect components alongside balanced supplements, contributing directly to improved survival and breeding success. Taipei Zoo's decades of formula refinement for Formosan pangolins produced husbandry guidelines now referenced worldwide.
Stress and Behavioural Issues in Captivity
Pangolins are solitary, nocturnal animals with large home ranges and a strong aversion to disturbance, making them exceptionally poor candidates for traditional zoo exhibition. Stress is a primary driver of captive mortality, precipitating immune suppression, appetite loss and fatal secondary infections. Common stressors include human proximity, artificial lighting during rest periods, unfamiliar substrates and the absence of natural foraging opportunities. Pangolins do not habituate easily to handling, and even routine veterinary checks can trigger prolonged food refusal.
Stressed pangolins exhibit repetitive pacing, prolonged defensive curling, self-directed scale rubbing and refusal to uncurl for feeding. Successful facilities have responded with low-disturbance enclosures featuring natural substrates, dim lighting on reverse day-night cycles, and enrichment such as artificial termite mounds that allow species-typical foraging behaviour.
Breeding Challenges in Captivity
Even where pangolins survive long-term, breeding remains exceptionally difficult. Pangolins reproduce slowly, typically producing a single offspring per year, and captive conditions introduce additional barriers. Research has documented low mating willingness among captive males, though the causes remain poorly understood. Female reproductive biology is also insufficiently studied: oestrus cycles are poorly characterised, gestation periods were historically misestimated, and age of sexual maturity is not definitively established for most species.
Brookfield Zoo's programme revealed that white-bellied tree pangolin gestation is closer to 200 days, substantially longer than the 140 to 150 days previously estimated. Neonatal pangolins are fragile, and hand-rearing is difficult when mothers reject young under captive conditions. Despite these obstacles, Brookfield has achieved over ten births in the past decade, including a second-generation birth in 2022. Assisted reproductive technologies, including sperm collection and analysis, are being explored as a potential tool to improve breeding rates.
Successful Zoo Programmes Around the World
While the overall record is sobering, a small number of institutions have achieved genuine progress.
Taipei Zoo, Taiwan
Taipei Zoo is the global leader in captive pangolin husbandry. Its rescue programme began in 1997, achieving the first successful captive breeding of Formosan pangolins that same year. Taipei remains the only institution to have bred pangolins to the third filial generation, a milestone documented in a 2021 Communications Biology paper. The zoo has established cooperative agreements with Prague Zoo (offspring born 2023 and 2024) and Leipzig Zoo, which has housed Chinese pangolins from Taipei since 2007.
Brookfield Zoo Chicago, United States
A founding member of the North American Pangolin Consortium, Brookfield is one of the few accredited US facilities to have bred white-bellied tree pangolins (Phataginus tricuspis). It maintains over a dozen pangolins and shares its dietary and husbandry research with conservation partners in Africa.
San Diego Zoo and Leipzig Zoo
San Diego Zoo has contributed through rescue, advocacy and research, hosting a landmark global pangolin conservation conference in 2014 and providing emergency veterinary care for confiscated animals. Leipzig Zoo is one of the few European institutions to maintain Chinese pangolins (Manis pentadactyla), participating in over 80 species breeding programmes.
Zoos as Conservation Education Platforms
Beyond direct animal care, zoos raise public awareness about pangolin trafficking. Many people will never encounter a pangolin in the wild, and zoo-based education programmes communicate the severity of the poaching threat to broad audiences. World Pangolin Day events, held annually in February, generate media coverage and fundraising for field conservation. Research conducted under controlled captive conditions also provides data on pangolin physiology and disease that would be difficult to obtain from wild populations.
However, the educational value must be weighed against welfare costs. A nocturnal pangolin curled into a ball at the back of an enclosure communicates very little to daytime visitors. Several institutions have moved toward digital displays, documentary screenings and interactive models as alternatives to live exhibition.
The Ethical Debate: Captive Programmes vs Wild Conservation
Whether pangolins belong in zoos at all remains contentious. The debate centres on a tension between potential benefits of captive research and breeding, and the welfare and opportunity costs involved.
Supporters argue that captive populations provide a genetic safety net, that controlled settings generate research data impossible to collect in the field, and that exhibits raise awareness and funding for field conservation. Knowledge from captive husbandry also supports rehabilitation of confiscated pangolins destined for release.
Critics counter that the high financial cost of zoo maintenance could fund substantial anti-poaching operations or demand reduction campaigns. Captive pangolins experience chronic welfare compromise, acquiring animals even legally risks stimulating demand, and captive-bred pangolins have never been reintroduced to the wild at meaningful scale.
Most conservation biologists now agree that captive programmes should complement, not substitute for, protection of wild populations. The International Fund for Animal Welfare has argued the priority should be rescuing trafficked pangolins and returning them to the wild rather than building permanent collections.
The South African Approach: Rescue, Rehabilitate, Release
South Africa has charted a distinctive path, prioritising rehabilitation and release over permanent zoo display.
Johannesburg Wildlife Veterinary Hospital
The Johannesburg Wildlife Veterinary Hospital (JWVH) is the primary intake facility for Temminck's ground pangolins (Smutsia temminckii) confiscated from the illegal trade. The hospital has treated over 200 pangolins, providing intensive care to animals typically arriving dehydrated, malnourished and severely stressed. After stabilisation, pangolins are reintroduced to natural foraging through supervised daily walks with dedicated handlers.
African Pangolin Working Group and Phinda
The African Pangolin Working Group (APWG) coordinates rescue, rehabilitation and release across southern Africa, focusing on soft release into protected areas with GPS satellite and VHF radio tracking. The celebrated reintroduction programme at andBeyond Phinda Private Game Reserve in KwaZulu-Natal, launched in 2019 with JWVH and Humane Society International-Africa, returned pangolins to an area of local extinction. Of seven released, five survived and established home ranges, with wild-born pups confirming natural breeding.
Looking Ahead
More than 70 years after pangolins first entered zoo collections, they remain among the most challenging mammals to maintain. Yet real progress has been made. Breakthroughs at Taipei Zoo, Brookfield Zoo and other institutions have moved captive care from near-certain failure to cautious optimism for select species. South Africa's rescue-to-release model offers a compelling alternative that prioritises wild population recovery.
The path forward will likely blend approaches: targeted captive research where it generates clear conservation returns, robust rehabilitation-and-release pipelines for confiscated animals, and far greater investment in the anti-poaching enforcement and habitat protection that pangolins ultimately need to survive in the wild.
Frequently Asked Questions
Why are pangolins so difficult to keep in zoos?
Pangolins are extremely difficult to keep in zoos because of their highly specialised diet of ants and termites, their acute sensitivity to stress, their solitary and nocturnal nature, and their susceptibility to gastrointestinal and respiratory disease in captivity. Historically, mortality rates exceeded 60% within the first year for many captive populations, though advances in husbandry have improved outcomes at specialist facilities.
Which zoos have successfully bred pangolins in captivity?
Taipei Zoo in Taiwan has the longest record of successful pangolin breeding, having first bred Formosan pangolins in 1997 and achieving third-generation captive births. Brookfield Zoo Chicago has bred white-bellied tree pangolins multiple times, with over ten births in the past decade. Leipzig Zoo in Germany and Prague Zoo have also maintained pangolins received through conservation cooperation agreements with Taipei Zoo.
What do pangolins eat in zoos if they cannot access wild ants and termites?
Zoos feed pangolins specially formulated substitute diets that typically include a mixture of commercially available insectivore pellets, chitin-rich supplements, bee larvae, silkworm pupae, egg, and small quantities of nutritional additives. Developing an accepted and nutritionally complete artificial diet remains one of the greatest challenges of captive pangolin care, as many individuals refuse unfamiliar food items.
Does South Africa keep pangolins in zoos?
South Africa generally favours rescue-to-release programmes over permanent zoo exhibits. Organisations such as the African Pangolin Working Group and the Johannesburg Wildlife Veterinary Hospital rehabilitate pangolins confiscated from the illegal wildlife trade and release them into protected areas. The Phinda Private Game Reserve reintroduction programme in KwaZulu-Natal has successfully reversed local extinction, with wild-born pups documented after release.
Are captive breeding programmes necessary for pangolin conservation?
Opinions are divided. Supporters argue that captive breeding provides a genetic safety net, generates critical research data on pangolin biology, and raises public awareness. Critics counter that resources would be better spent on anti-poaching enforcement, habitat protection, and demand reduction in consumer countries. Most conservationists agree that captive programmes should complement, not replace, robust wild population protection efforts.