Something is moving through the Louisiana swamps at night that wildlife cameras have been struggling to capture and that thermal imaging drones finally did.

The super pigs of Louisiana, hybrid feral hogs that can weigh over 500 lb, reproduce faster than any conventional control program can reduce them, and cause billions of dollars in agricultural and ecological damage annually.

Have been disappearing from specific areas of the state at rates that no human eradication effort has come close to achieving.

Wildlife biologists noticed the pattern.

They sent up the drones.

And what the thermal imaging footage showed them moving through the cyprress and the dark water was not what anyone managing this problem had expected to find.

What super pigs actually are.

The term feral hog is technically accurate, but misleading in the way that calling a hurricane a rainstorm is technically accurate and misleading.

The animals that wildlife managers and agricultural interests across the American South have been fighting for decades are not simply domestic pigs that escaped and went wild.

Though that is where the problem began.

[clears throat] They are the product of a biological process that humans set in motion and then characteristically failed to appreciate the implications of until the implications were several hundred pounds and standing in a corn field.

The super pig problem in Louisiana specifically traces to the intersection of multiple historical decisions.

European settlers brought domestic pigs to North America centuries ago and escapees from those early herds established feral populations that persisted and gradually adapted to the landscape.

In the 20th century, Eurasian wild boar were intentionally released in parts of the American South for sport hunting on the theory that a more challenging quarry than the existing feral hog would improve the hunting experience.

The theory was not wrong about the challenge.

It was comprehensively wrong about everything else.

Because Eurasian wild boar hybridized with the existing feral hog populations and produced offspring that combined the worst characteristics of both parent types into something new.

The hybrids, the animals that the wildlife management literature increasingly refers to as super pigs, are larger than either parent species, more intelligent, more behaviorally flexible, more reproductively prolific, and significantly more resistant to the environmental conditions that limit population growth in pure feral hog or pure wild boar populations.

They can exceed 500 lb in body weight.

They are capable of surviving in swamp conditions, in upland forest, in agricultural fields, and in the margins of suburban development with an adaptability that reflects a generalist intelligence that pure wild boar, adapted to more specific habitat conditions, does not fully possess.

They reproduce at rates that would be impressive in a species without their ecological impact.

Sows can produce two litters per year of 4 to 12 piglets each and the young reach reproductive maturity at approximately 6 to 8 months.

A population of super pigs left uncontrolled does not simply persist.

It expands and it expands faster than the conventional management arithmetic can keep up with.

The scale of the problem.

Louisiana is not the only state with a super pig problem.

The animals have established populations across the southern United States and are spreading northward in ways that concern wildlife managers in states that did not previously have significant feral pig populations.

But Louisiana’s specific combination of geography, climate, and existing agricultural land use has made it one of the states where the problem is most severe and most thoroughly documented.

The economic losses attributable to super pig activity in Louisiana are measured in the hundreds of millions of dollars annually.

Crop destruction is the most immediately quantifiable loss.

Super pigs uproot agricultural fields, consume standing crops, damage irrigation infrastructure, and contaminate water sources in ways that produce direct financial losses calculable per acre per incident.

The damage to wetland and swamp ecosystems is less immediately quantifiable but ecologically more significant.

Super pigs root up the shallow soils of wetland margins.

Consume the root systems of the wetland vegetation that maintains bank stability and water quality.

Reduce the structural complexity of habitat that supports dozens of species of birds, reptiles, and small mammals.

And destabilize the edges of water bodies in ways that accelerate erosion and turbidity in water systems whose clarity already faces multiple anthropogenic stresses.

The eradication efforts mounted against super pig populations in Louisiana across the past several decades represent a sustained and resourceful attempt to solve a problem that has consistently proven more resistant to solution than the effort invested in solving it would predict.

Trapping programs have removed significant numbers of animals from local areas, but the population’s reproductive rate replaces trapped animals faster than the trapping can maintain population reduction.

Aerial hunting programs using helicopters have produced large 1-day removal numbers, but cannot be sustained at the frequency required to affect the breeding population meaningfully.

Poison programs have been proposed and debated, but not implemented at scale because of concerns about non-target species impacts in the ecologically complex Louisiana landscape.

The super pigs, in short, were winning.

The humans trying to manage them had not found an approach that worked at the scale of the problem.

And then the populations in certain areas started dropping without any corresponding increase in management pressure.

When they started disappearing, the first people to notice that something was changing in the super pig populations of specific Louisiana swamp areas were not wildlife biologists.

They were hunters and trappers who had been working these landscapes for years and who had developed the kind of ground level knowledge of local wildlife populations that formal monitoring programs cannot fully replicate.

These individuals began reporting in conversations at feed stores and hunting camps and online forums that the pig numbers in certain areas were not what they had been.

Spots where pigs had been reliably found were producing fewer animals.

Sign.

The rooting damage, the wallow sites, the track patterns that indicate pig presence was diminishing in areas where it had been persistent.

The wildlife biologists who eventually became aware of these reports initially interpreted them with appropriate caution.

Feral pig population numbers fluctuate naturally in response to food availability, drought, disease, and the cumulative effects of ongoing management pressure.

Hunters and trappers noticing fewer pigs in specific locations in a specific season is not by itself evidence of a significant population change.

What elevated the reports from anecdote to data worthy of systematic attention was their spatial consistency.

The areas where pig numbers were reported as declining were not scattered randomly across the landscape, but were concentrated in specific zones of the swamp and wetland complex.

And those zones were geographically coherent in a way that suggested something systematic was happening in them rather than the random variation of normal population fluctuation.

The wildlife biologists who began systematic monitoring of the reported decline areas set up camera traps across the zones where pig activity had reportedly decreased.

The camera trap data confirmed what the hunters and trappers had reported.

Pig activity in these areas had genuinely decreased and the decrease was ongoing rather than representing a temporary fluctuation.

But the camera traps positioned to capture what was moving through the landscape at ground level during daylight and nighttime hours were not capturing a clear picture of what was driving the reduction.

The resolution and coverage of ground level cameras in dense swamp vegetation is limited.

The animals potentially responsible for the reduction were not reliably appearing in front of cameras positioned for pig monitoring purposes.

The decision to deploy thermal imaging drones over the areas of declining pig activity was motivated by the specific limitations of ground level monitoring in this landscape.

Thermal imaging drones flying over the swamp canopy at night see the heat signatures of large mammals moving through the vegetation below.

Regardless of whether those mammals are in camera trap range or visible from ground level observation positions, they produce a view of the landscape’s animal activity that groundbased monitoring cannot achieve.

And the footage they returned from the Louisiana swamps was not what the biologists had expected.

Though in retrospect, some of them said later, the evidence had been building toward this finding for longer than they had realized.

What the drone found, the thermal imaging footage from the drone surveys over the areas of declining pig activity showed pigs.

That was expected.

It also showed the animals that were hunting the pigs.

That was not the footage captured across multiple nights of drone survey in the target areas showed interactions between super pig groups and predators at a frequency and a scale that the research team found in their own subsequent documentation of the finding genuinely difficult to convey without language that scientific communication tends to avoid as insufficiently precise.

What was happening in the Louisiana swamps at night in the areas where pig populations were declining was predation at a rate and by a predator whose presence in those areas had not been systematically documented and whose population in Louisiana was not understood to be at the density the footage implied.

The thermal imaging showed groups of animals, not a single individual predator, but coordinated multiple animal activity pursuing and taking down super pigs of substantial size.

The footage included events in which pigs considerably larger than the predators involved were successfully killed in sequences that demonstrated a hunting strategy whose sophistication and effectiveness the research team found striking.

The heat signatures in the thermal footage were unambiguous about the identity of the predators.

The species was unmistakable once the footage was reviewed.

What was ambiguous initially was how many of them there were and how long they had been doing this without appearing in the monitoring programs that were supposed to be tracking large carnivore activity in this part of Louisiana.

The answer to that ambiguity emerged from a review of the monitoring data in the context of the drone footage.

The predator had been present in these areas at low but growing population density for a period that the retrospective analysis of monitoring records suggested might extend to several years.

The animals had been avoiding the specific monitoring setups deployed for pig management purposes in ways that reflected the behavioral intelligence and weariness of a species with a long history of persecution by humans in this landscape.

They had been hunting the pigs in areas and at times that the ground level monitoring was not well positioned to detect.

The drone observing from above the canopy at night had found what the ground level systems had been missing.

The predator that came back.

The predator that the thermal imaging drone captured hunting super pigs in the Louisiana swamps is the American black bear.

Specifically the Louisiana black bear, a subspecies that was listed as threatened under the Endangered Species Act in 1992, and that conservation programs have been working to restore to functional population levels in Louisiana’s bottomland hardwood and swamp habitats across the past three decades.

The Louisiana black bears history in the state is a story of humancaused decline followed by conservationdriven partial recovery that represents one of the endangered species acts more significant successes in the American South.

The subspecies was once distributed across the bottomland forest and swamp habitat of Louisiana, Mississippi, and adjacent states.

Habitat that has been reduced to a fraction of its historical extent by agricultural conversion, logging, and development.

Across the past two centuries, the bear population declined along with the habitat, persisting in increasingly fragmented remnant populations that became genetically isolated from each other and from the larger black bear populations of adjacent regions.

The conservation programs initiated in the 1990s and sustained across the following decades involved habitat protection, the restoration of forest corridors connecting fragmented bear subopuls, restrictions on hunting, and the monitoring programs that tracked the subspecies gradual recovery.

The Louisiana black bear was delisted from threatened status in 2016 when the population had recovered sufficiently to meet the delisting criteria.

A biological and conservation success that was widely reported at the time and appropriately celebrated as evidence that the Endangered Species Act, applied consistently, can produce measurable recovery in species populations that have been reduced to critical levels by human activity.

What was not widely appreciated at the time of Dellisting and what the drone footage from the Super Pig monitoring program has now made dramatically visible is the specific ecological role that the recovering Louisiana black bear population was beginning to play in the swamp and bottomland habitats it was reoccupying.

Bears are omnivores with the opportunistic intelligence to exploit available protein sources.

And super pigs, large, numerous, relatively slow relative to a pursuing predator that can reach 35 mph in short bursts and occupying the same swamp and wetland habitats that bears use represent exactly the kind of high calorie prey resource that a recovering predator population would be expected to learn to exploit.

The drone footage showed that they had learned and the efficiency with which they were doing it was transforming the population dynamics of the super pigs in their territory.

How a predator hunts super pigs.

The hunting behavior captured in the drone thermal imaging footage and confirmed through subsequent targeted monitoring of specific bear pig interaction zones provides a picture of predation that the research team has described as more sophisticated and more effective than initial expectations for bear predation on large adult super pigs had suggested.

Super pigs are not easy prey.

Their size, adults regularly exceeding 200 lb with individuals reaching 500 lb in the areas of best food availability and their defensive behavior make them a challenging target for any predator.

Adult super pigs are aggressive when cornered or defending young, equipped with sharp tusks that can inflict serious injuries, and capable of moving quickly through the dense vegetation of swamp margins that might be expected to slow a pursuing predator more than the pig.

The assumption among wildlife managers had been that bear predation on super pigs would be limited primarily to piglets, the vulnerable juvenile cohort that any large predator might take opportunistically without significantly affecting the adult population that drives the breeding dynamics of the herd.

The drone footage challenged this assumption.

The documented predation events captured across multiple nights of survey included successful kills of subad adult and adult pigs whose weight was estimated from the footage at well above the range where piglet predation assumptions would apply.

The hunting sequences captured show bears using the specific topography and vegetation structure of the swamp environment to approach pigs in ways that limit the pig’s detection and escape options.

Pursuing into water where the pig’s movement is compromised relative to the bears.

Using dense vegetation cover to close distance before the pig detects the threat and in several documented events coordinating between multiple bears in ways that complicate the pig’s escape route.

The predation rate implied by the observed events extrapolated across the size of the bear population now estimated to be using these territories and the frequency of interactions documented in the monitoring period is substantially higher than the management models for bare impact on super pig populations had projected.

The bears were not simply taking occasional piglets as an opportunistic supplement to their normal diet.

They were actively and effectively hunting adult and subad adult super pigs as a significant protein source.

And they were doing it at rates that compounded across a recovering and expanding bear population produced the population reduction that the monitoring data had documented in the years before the drone surveys identified its cause.

What this means for ecosystems, the ecological consequences of significant super pig population reduction in specific Louisiana swamp and wetland areas are being documented in the monitoring programs established in the target zones.

And the documentation is showing exactly what the trophic cascade theory of predator prey dynamics would predict.

Changes propagating through the food web from the reduction in the pig population downward and outward in ways that are measurable across multiple biological communities.

The most immediately visible changes are in the wetland vegetation.

Super pigs are destructive rooters.

Their foraging behavior physically disrupts the soil structure and root systems of wetland plants in ways that can transform a stable species-rich wetland margin into a churned destabilized bank that erodess into the water body and loses the vegetation community that provides habitat structure for dozens of dependent species.

In areas where bear predation has reduced pig activity, the wetland margins are recovering vegetation cover at rates consistent with the sessation of rooting disturbance rather than with any active restoration effort.

The plants are not being planted.

They are returning because the force that was preventing them from establishing has been reduced.

The bird communities of these areas are showing responses consistent with improved habitat structure.

Waiting bird species that nest and forage in the shallow water margins.

Herands, egrets, ibises are showing increased activity in areas with reduced pig pressure, consistent with the improvement in the shallow water habitat quality that results from reduced bank destabilization and reduced water turbidity caused by pig rooting in the water margins.

Ground nesting bird species whose nests are vulnerable to pig rooting and direct consumption are showing improved nesting success metrics in the reduced pig areas consistent with reduced nest destruction by rooting pigs.

Amphibian communities whose populations are sensitive indicators of habitat quality in wetland environments are showing early signs of response in the monitoring data from reduced pig areas.

Frog call surveys, a standard methodology for amphibian population assessment, are showing increased species richness and call frequency in areas with documented pig population reduction compared to control areas where pig activity remains at historical levels.

Amphibians are among the most sensitive indicators of wetland ecosystem health available to ecologists and their positive response to pig reduction is a signal that the ecosystem recovery implied by the vegetation and bird data is real and propagating through the biological community at multiple levels.

What wildlife managers say.

The official responses to the drone footage and the documentation of Louisiana black bear predation on super pigs have been varied in ways that reflect the multiple and sometimes conflicting interests of the agencies, stakeholder groups, and individual practitioners who have been working the super pig problem in Louisiana for years.

The wildlife biologists whose monitoring programs documented the population decline and whose drone surveys identified its cause have been in their formal communications about the finding.

Cautiously enthusiastic in the specific way of scientists who have found a result that exceeds their prior expectations and who want to ensure that the result is understood correctly before it generates policy implications that the evidence may not yet fully support.

The finding is real.

The predation is happening.

The population effects are documented.

The ecological consequences are measurable.

What requires caution is the inference from these specific documented facts to the broader claim that bear predation represents a viable large-scale solution to the super pig problem across Louisiana.

And inference the data supports in specific areas under specific conditions, but whose generalizability requires additional investigation.

The hunting and agricultural communities have responded with a complexity that reflects the genuinely conflicting interests the finding engages.

Hunters who have been frustrated by the damage super pigs do to the landscape they hunt and by the ineffectiveness of conventional control methods have generally responded positively to the documentation that a natural predator is producing population effects that hunting pressure has not achieved.

Agricultural interests with concerns about crop and infrastructure damage from super pigs have similarly responded with interest in a control mechanism that does not require the ongoing human labor and expense of active management programs.

But some agricultural producers have also expressed concerns about a recovering bear population sharing the landscape with their operations.

Concerns about bear damage to crops and livestock that the expansion of the bear population raises independently of its effect on the pigs.

The Louisiana Department of Wildlife and Fisheries and the US Fish and Wildlife Service have both indicated interest in incorporating the bear pig interaction dynamics into updated management frameworks for both species.

A process that will require developing a more complete understanding of how the bear population’s expansion is interacting with the super pig population across the full range of habitat types in the state and how the management of each species should be informed by its relationship with the other.

Why this changes everything?

Let me say clearly what a recovering predator hunting invasive super pigs in the Louisiana swamps means for wildlife management practice, for ecological theory, and for the broader question of what human civilization’s relationship with the natural world should look like when the natural world offers solutions that human management has been unable to provide.

The first thing it changes is the management calculus for the super pig problem specifically.

The most expensive, most laborintensive, and least effective large-scale feral pig control efforts that wildlife managers have implemented across the American South have been pursuing the problem with the tools of active human management, trapping, aerial hunting, toxicants in a problem space that human management tools are not well suited to address at the required scale.

The drone footage from Louisiana documents that a natural predator, given the population recovery conditions that conservation programs have been building across 30 years, can produce super pig population effects in specific areas that the active management approaches have not achieved.

This does not mean that active management should be abandoned.

The bear population’s recovery covers specific areas of suitable habitat and will not address the super pig problem across the full range of habitat types where the pigs have established.

But it does mean that the conservation of predator populations capable of suppressing invasive prey is a wildlife management strategy with quantifiable value and that the value should be incorporated into the benefit calculations that justify conservation investment in predator recovery.

The second thing it changes is the understanding of what 30 years of Louisiana black bear conservation has actually produced.

The delisting of the Louisiana black bear from threatened status in 2016 was celebrated as a conservation success measured in population numbers and breeding pairs and habitat connectivity.

The drone footage adds a dimension to that success that the conservation literature had not fully anticipated.

That the recovering bear population is providing an ecosystem service, specifically the suppression of an invasive species whose ecological damage has been documented across hundreds of thousands of acres of Louisiana habitat.

The bears are not simply existing in the landscape.

They are actively repairing it in the specific sense of reducing the population of an ecologically destructive invasive species at a rate that is producing measurable improvements in wetland vegetation, water quality, and the biological communities that depend on both.

The third thing it changes is the argument for predator recovery as an ecological investment.

The economic case for predator conservation has historically been made in terms of the aesthetic, cultural, and existence values that people assign to large carnivore species.

Values that are real but difficult to quantify in the costbenefit frameworks that environmental policy operates within.

The Louisiana black bears demonstrated suppression of super pig populations provides a concrete quantifiable economic benefit that can be placed in those frameworks.

The reduction in agricultural damage, the improvement in wetland ecosystem services, the reduction in the cost of active management programs that the natural predation partially replaces.

These are benefits that the conservation programs that produce the bear recovery did not know they were delivering when they were designed.

They are benefits that the drone footage has made visible and that the ecological monitoring is beginning to quantify.

Something was moving through the Louisiana swamps at night that the ground level cameras were not capturing.

The thermal imaging drone found it.

A predator whose recovery humans had been funding and facilitating for 30 years.

Doing something in the dark that the wildlife management programs aimed at the same landscape had been trying and failing to do for decades.

The bears were hunting the super pigs.

The super pig populations were declining.

The swamps were recovering.

Nature applied a solution that human management had been unable to find.

It did not need permission.

It just needed the predator to come back.

And after 30 years of conservation work, it…