Electric Fences: A Silent Killer of South African Pangolins

Published: 27 June 2026 • AlphaPanga Research Team

When most people think about threats facing South Africa's ground pangolin (Smutsia temminckii), they think of poaching. Pangolins are the world's most trafficked wild mammal, and the criminal networks supplying illegal markets in Asia have decimated populations across the continent. Yet on the farms, game reserves and smallholdings of Limpopo, North West and Gauteng's peri-urban fringe, a less discussed killer claims pangolins night after night: the electric fence.

Studies suggest that electric fence electrocution is among the leading non-poaching causes of pangolin mortality in South Africa. Because deaths occur in darkness, on private land, and are rarely reported to conservation authorities, the true toll is likely far greater than existing records reflect. Understanding why pangolins die on electric fences, where the problem is most severe and what can be done about it is essential for anyone managing land within pangolin range.

Why Pangolins Are Uniquely Vulnerable

No other large mammal in the South African bushveld is as poorly equipped to survive an encounter with an electric fence as the ground pangolin. Three interconnected biological traits explain the extraordinary lethality of these structures for this species.

The Defensive Curl Reflex

The pangolin's primary defence against predators is to curl instantly into a tight, armoured ball, drawing its head beneath its tail and presenting a surface of overlapping keratin scales. This response has proven effective against lions, leopards and hyenas for millions of years. Against an electric fence, it is fatal.

When a foraging pangolin brushes a low-strung live wire in the dark, the resulting shock does not cause the animal to flinch away. It triggers the curl reflex. The pangolin wraps its body around the conductor. Where a cow or a dog breaks contact within a fraction of a second and bolts, the curled pangolin maintains continuous contact with the live wire for seconds, minutes, or until it dies. Repeated high-voltage pulses from a standard livestock energiser cause cardiac arrhythmia, respiratory failure and severe internal tissue damage. Without intervention, the outcome is almost always death.

Nocturnal Movement Patterns

Ground pangolins are entirely nocturnal, emerging after dark to forage for the ants and termites that make up their entire diet. A male pangolin may walk four or five kilometres through the night, crossing numerous fence lines as it traces a route through its home range. Researchers monitoring individual animals with GPS telemetry have documented home ranges exceeding 100 square kilometres in some areas of Limpopo. An animal covering that ground nightly will encounter electric fence boundaries repeatedly throughout its life.

Nocturnal movement also means that encounters occur when no one is watching. A landowner who rises at dawn will not witness the event that killed a pangolin against the fence line of the back paddock at two in the morning.

No Instinctive Avoidance of Electric Fences

Cattle, goats and even elephants learn to associate the visual cues of an electric fence, the wire, the insulators, the posts, with the memory of previous shocks, and develop behavioural avoidance. Pangolins have no such capacity in this context. They do not see well and navigate primarily by smell and hearing. They cannot detect an electric fence before contact, and there is no evidence that pangolins that survive fence encounters modify their behaviour to avoid future contact. Each night brings the same risk as the night before.

The Scale of the Problem in South Africa

South Africa is one of the most densely fenced countries in the world. Private farmland, game reserves, communal conservancies and peri-urban smallholdings are enclosed by hundreds of thousands of kilometres of electric fencing. The core range of the ground pangolin in South Africa, concentrated in Limpopo, North West and northern Gauteng, overlaps almost exactly with the regions of highest electric fence density.

Researchers estimate that fence-related deaths represent a significant proportion of total pangolin mortality in South Africa, potentially rivalling road-kill in many heavily fenced agricultural landscapes. The Pangolin Project, which operates across Limpopo and North West, records fence fatalities as a routine part of its field work. The Tikki Hywood Trust and the African Pangolin Working Group document similar incidents across their monitoring networks. All three organisations caution that their records represent a fraction of actual deaths, since most incidents occur on unmonitored private land and carcasses are rarely found or reported.

Geographic hotspots align with both high pangolin density and high fence density. The Waterberg region of Limpopo, the Thabazimbi and Mokopane districts, game farm clusters in North West, and the peri-urban smallholding belt south and west of Pretoria in Gauteng are consistently cited by field researchers as areas of elevated concern. As residential development continues to push into former agricultural land around Johannesburg and Pretoria, security fences with higher-output energisers are being installed in areas that pangolins have occupied for generations.

How Electric Fences Kill Pangolins

The mechanism of death varies depending on fence design, energiser output and the duration of contact, but follows a consistent biological pattern.

The Curl Reflex as a Death Trap

A walking pangolin contacts a low strand of electrified wire, most commonly one set at 15 to 20 centimetres above ground level, which is standard practice for predator exclusion and small stock fencing across South Africa. The pulse of current triggers the curl reflex within a fraction of a second. The animal's body wraps around the wire, and subsequent pulses from the energiser are delivered directly to the core of the curled animal with no possibility of escape. Internal organs, the heart in particular, are subjected to repeated electrical insult.

Sustained Electrocution Versus Brief Shock

Standard agricultural electric fences are designed to deliver a brief, memorable shock that conditions livestock to avoid the boundary. The shock is painful but not inherently fatal to an animal that makes contact and immediately withdraws. The problem for pangolins is duration. Studies on cardiac vulnerability to electric current show that sustained exposure at the voltages used in livestock fencing is likely to induce ventricular fibrillation in small to medium mammals. A pangolin weighing four to eighteen kilograms is well within the range where sustained fence-level current is lethal.

Secondary Mortality

Not every fence encounter kills instantly. Pangolins that survive initial electrocution may be left incapacitated, unable to uncurl, beside the fence for hours. In this state they are vulnerable to dehydration in the heat of a South African morning, to predation by jackals, caracals and domestic dogs, and to secondary electrocution when subsequent pulses reach the still-curled animal. Field teams from pangolin conservation organisations have found animals alive but severely compromised in this condition. Without rapid rescue, the prognosis for incapacitated pangolins found beside fence lines is poor.

Mitigation Strategies for Landowners

The good news is that several practical, low-cost interventions can substantially reduce the risk that existing electric fences pose to pangolins. Landowners in pangolin range areas are encouraged to adopt the following measures.

Raise the Bottom Wire

The single most impactful modification is raising the lowest electrified strand to at least 30 centimetres above ground level. At this height, an adult ground pangolin can walk beneath the live wire without contact. The adjustment does not require replacing fencing infrastructure and carries no significant cost beyond the labour of repositioning insulators and wire. It also does not meaningfully compromise fence effectiveness against livestock or most predators. Landowners managing for predator exclusion can retain a non-electrified kick board or plain wire strand at ground level to prevent livestock from pushing beneath the fence.

Wildlife-Friendly Fence Designs

New fence installations in pangolin habitat should incorporate wildlife-sensitive design from the outset. This means: electrified strands beginning no lower than 30 centimetres above ground; pulsed rather than continuous-current energisers; and energiser output calibrated to the minimum joule rating required for the intended livestock management purpose. High-output security fence energisers should not be used in areas with confirmed pangolin activity. Where drainage lines, dry riverbeds and open grassland vleis cross fence lines, a short non-electrified ground-level passage allows small mammals to transit without risk.

Switch Off the Bottom Strand at Night

On farms where fencing infrastructure prevents immediate structural modification, switching off the lowest electrified strand between dusk and dawn removes the primary point of lethal contact during the hours when pangolins are active. This is not a perfect solution, as pangolins may still contact higher strands, but it significantly reduces the risk profile of existing fences at zero cost. Solar-powered timer units suitable for this purpose are available from agricultural suppliers across South Africa.

Reporting Found Pangolins

Every documented fence fatality contributes to the data record used by conservation organisations to identify mortality hotspots, advocate for policy change and prioritise landowner engagement. Landowners who find a pangolin dead or incapacitated beside a fence line should photograph the scene, note the GPS coordinates, and report the incident to the Pangolin Project, the NSPCA wildlife unit or their provincial nature conservation authority. If the animal is alive, switching off the energiser and contacting a registered wildlife rehabilitator immediately gives the pangolin its best chance of survival. Further guidance on what to do when you encounter a pangolin in distress is available in other articles on the AlphaPanga blog.

Conservation Partnerships Making a Difference

Addressing electric fence mortality at a landscape scale requires coordinated effort between conservation organisations, landowners and provincial authorities. Several South African organisations are actively working on this problem.

The Pangolin Project runs a landowner engagement programme across Limpopo and North West that includes on-farm fence assessments, modification recommendations and, in some cases, financial or material support for implementing changes. Field staff conduct ranger training workshops to ensure that farm employees can identify a pangolin, recognise fence entanglement and respond correctly before calling for professional assistance.

The African Pangolin Working Group maintains a sightings and mortality database, and its researchers have used GPS telemetry data from rehabilitated animals to generate spatial pressure maps identifying fence sections where modification should be prioritised. The NSPCA's wildlife unit responds to rescue calls involving pangolins across Gauteng and the surrounding provinces and works with landowners following rescue incidents to prevent recurrence.

The Tikki Hywood Trust, operating primarily in Zimbabwe but with documented involvement in cross-border conservation cases affecting South African populations, contributes to the broader body of knowledge on pangolin fence mortality and rehabilitation outcomes. Collectively, these organisations are building the evidence base needed to support stronger national guidelines on electric fence design in wildlife-sensitive areas. For an overview of pangolin rehabilitation work in the region, see our coverage of rehabilitation and release programmes on the AlphaPanga blog.