Wolf: Ecological Function and Political Reality

The wolf is not a problem animal, but an ecosystem architect. As an apex predator, it regulates ungulate populations, alters the behavior of its prey, and triggers ecological chain reactions ranging from forest regeneration and riparian vegetation to the biodiversity of entire habitats. These connections are scientifically documented, internationally recognized, and largely irrelevant to Swiss politics. This is because Swiss wolf policy is not based on ecology, but rather on the interests of a hobby hunting lobby that sees the wolf primarily as a competitor.

This dossier brings together ecological research on wolves, from trophic cascades and carcass ecology to forest regeneration, and contrasts it with the political realities in Switzerland. It shows why the wolf's return is beneficial for biodiversity and why hunting policies are based not on science, but on fear-mongering and conflicts of interest. All evidence is presented in a way that allows it to be used in political initiatives, media discussions, and public debates.

What awaits you here

Trophic cascades: How the wolf, as an apex predator, shapes entire ecosystems from top to bottom. Yellowstone as a reference point, European research, and the question of what this means for Switzerland.
Selective predation: Why the wolf strengthens the fitness of prey populations by preferentially hunting sick, old and weak individuals, and how this differs from recreational hunting.
Carcass ecology: How wolf kills create a food source for scavengers, insects, fungi and plants, and expand the food web.
Forest regeneration and browsing reduction: Why the wolf is more relevant for Swiss protective forests than any culling regime and what research on the Landscape of Fear shows.
Self-regulation: Why wolves regulate their population density through territorial behavior, pack structure and food supply, and why politically set "targets" have no ecological basis.
Shyness towards humans: What research says about the behavior of wolves towards humans and why the risk is statistically negligible.
Political reality in Switzerland: How the ecological function of the wolf is systematically ignored in the political debate and what interests lie behind it.
The competing narratives of recreational hunting: Why recreational hunters perceive the wolf as a threat and how this narrative distorts wildlife policy.
What needs to change: 6 demands for a wildlife policy that takes ecological evidence seriously.
Argumentation: Answers to the most common objections to the ecological role of the wolf.
Quick links : All relevant articles, studies and dossiers.

Trophic cascades: The wolf as ecosystem architect

Trophic cascades describe an ecological process in which changes at the top of the food chain affect all levels below it. The wolf is the best-known example of this top-down effect: as an apex predator, it influences not only the population size of its prey but also their behavior, which cascades down to vegetation, soils, watercourses, and other animal species.

The most prominent case study is Yellowstone National Park. After the last wolf was eradicated in 1926, elk populations exploded uncontrollably, leading to massive overgrazing and the destruction of riparian vegetation. Following the reintroduction of 31 wolves in 1995, researchers led by William J. Ripple (Oregon State University) documented a remarkable recovery: willows, aspens, alders, and berry-bearing shrubs regrew, riparian shade increased, aquatic life recovered, erosion decreased, and even the river morphology changed. Ripple's comparative study (Global Ecology and Conservation, 2025) shows that Yellowstone surpasses 82 percent of the world's quantified trophic cascades.

The research is not without its critics: Ecologists like Arthur Middleton (Yale) and Oswald Schmitz point out that not all areas in Yellowstone are showing the same recovery and that factors such as climate change, bear density, and historical soil damage are masking the effects. David Mech, one of the world's leading wolf experts, warns against "canonizing" the wolf as the sole savior of ecosystems. This distinction is important: Trophic cascades are real and documented, but their strength varies depending on the ecosystem, and no single predator can undo decades of human landscape destruction.

For Switzerland, this means that the return of the wolf has the potential to reduce browsing pressure on forests, promote forest regeneration, and strengthen biodiversity in mountain ecosystems. However, this potential will only be realized if the wolf population is not systematically decimated before it can have an ecological impact.

More on this topic: Hunting and biodiversity: Does hunting really protect nature? and Cultural landscape as a myth

Selective predation: Why wolves strengthen prey populations

One of the best-documented characteristics of wolf predation is its selectivity. Wolves "test" their prey by briefly chasing it and observing its reaction. Escape speed, physical condition, and behavior patterns tell the pack whether an individual is healthy or weakened. The result: wolves disproportionately prey on young, old, sick, and weakened animals.

This selective mechanism has far-reaching consequences. In the short term, the average fitness of the prey population increases because the least viable individuals are eliminated. In the long term, natural selection takes effect: animals that escape wolf predation pass on their escape ability, alertness, and physical condition to their offspring.

Recreational hunting works in reverse. Recreational hunters don't choose the weakest individuals, but rather the most visible, largest, and often genetically most valuable: the magnificent stag with its impressive antlers, the chamois perched on a rocky ledge, the roebuck in its prime. Studies such as Darimont et al. (2009, Science) show that human "predation" decimates prey populations on average far more than natural predators, selectively removing the strongest individuals. The result is an evolutionary reversal: instead of promoting fitness, recreational hunting selects for inconspicuousness and small size.

In Switzerland, this difference is particularly relevant: In cantons with high-level hunting and a focus on trophies, the genetically most valuable individuals are systematically shot. The wolf would do the opposite. The fact that the recreational hunting lobby does not recognize precisely this ecological function has a simple reason: A wolf that preys on weaker animals competes directly with recreational hunters who claim the stronger animals.

More on this topic: High-altitude hunting in Switzerland: Traditional ritual, zone of violence and stress test for wild animals and hunting myths: 12 claims you should critically examine

Carcass ecology: How wolf kills expand the food web

Wolves rarely consume their prey completely. The remains—bones, entrails, fur, and meat scraps—become a food source for a multitude of other species. Carcass ecology is a distinct field of research that demonstrates just how profound the impact of a single wolf attack can be on the surrounding ecosystem.

In Yellowstone, researchers documented that wolf kills are regularly used by scavengers such as ravens, bald eagles, magpies, coyotes, and even grizzly bears. Raven populations alone benefited significantly from the reintroduction of wolves. But the cascade continues: insects colonize the carcasses, bacteria and fungi decompose the organic material, and the released nutrients enrich the soil and promote plant growth in the immediate vicinity.

In Switzerland, this function is particularly relevant for alpine ecosystems, where carrion is naturally rare. Since the eradication of predators in the 19th century, alpine scavenger communities—golden eagles, bearded vultures, ravens, and red foxes—have lacked a regular food source other than human waste. The wolf brings this food source back. This is not a side effect, but an ecological function that directly strengthens biodiversity.

For comparison: An animal shot by recreational hunters is transported, gutted, and used. The entire biomass is removed from the ecosystem. An animal killed by a wolf remains in the area and feeds the local food web. The ecological difference between recreational hunting and wolf predation is fundamental at this level as well.

More on this topic: Hunting and wildlife diseases , wildlife corridors and habitat connectivity

Forest regeneration, browsing damage and the landscape of fear

In Switzerland, forest regeneration is a key political issue. Particularly in protective forests, which safeguard settlements, roads, and railway lines from avalanches, rockfalls, and mudslides, excessive browsing by ungulates has been causing serious problems for decades: young trees are eaten before they can grow, and the forest's natural regeneration is hindered. The costs for artificial reforestation and browsing protection amount to millions of francs annually.

Research on the "landscape of fear" shows why wolves can make a crucial contribution to solving this problem. In the presence of wolves, deer, roe deer, and chamois change their spatial behavior: they avoid areas with a high risk of predation (dense vegetation, streams, steep slopes) and spend less time at individual feeding sites. This effect, known as "ecological fear," reduces browsing pressure without a single animal having to be killed.

Studies from Yellowstone, the Polish Carpathians and the Swiss National Park show that this behavioral effect is often stronger than the pure population effect: Even if the total number of deer remains constant, browsing pressure decreases because the animals distribute themselves differently and feed less intensively in individual locations.

For Swiss forest protection policy, this would represent a paradigm shift: Instead of shooting 40,000 red deer and 80,000 roe deer every year and still having browsing problems, the presence of wolf packs in protected forest perimeters could reduce browsing pressure without taxpayer money and without recreational hunting. The fact that this connection is rarely mentioned in political debate is not due to a lack of evidence, but rather a lack of willingness to draw the necessary conclusions: If the wolf protects the forest better than recreational hunting, recreational hunting loses its last remaining ecological legitimacy.

More information: Special hunting in Graubünden and alternatives to recreational hunting

Self-regulation: Why wolves don't need political targets

Wolves regulate their population density through a complex system of territorial behavior, pack structure, and reproductive adaptation. A wolf pack claims a territory of 100 to 300 square kilometers, which it defends against other packs. Within the pack, usually only the alpha pair reproduces; the other members help with raising the young or disperse to establish their own territories.

When available territory and food supplies are exhausted, population growth stagnates: young wolves cannot find unoccupied territories, the reproduction rate drops, and natural mortality (territorial fights, disease, road traffic, food shortages) balances the birth rate. This mechanism has been documented in wolves worldwide and functions without human intervention.

Switzerland has around 300 wolves in approximately 30 packs (as of 2023). The politically set "target size" in Valais (reduction from 11 to 3 packs, Darbellay) has no ecological basis. It does not serve wildlife management, but rather serves to curry favor with the recreational hunting and agricultural lobbies. The wolf regulates itself if left to its own devices. What it cannot regulate are political fears and economic interests, but that's what livestock protection measures are for, not culling.

The 2020 revision of the Hunting Act (JSG) allows for the "proactive regulation" of wolf pups, the so-called basic regulation. Ecologically, this is counterproductive: Removing wolf pups destabilizes the pack structure, leads to the dissolution of family groups, and increases the likelihood that surviving individuals will disperse and cause conflicts in new territories. Sweden has had this experience and halted licensed wolf hunting in 2026 following court rulings.

More on this topic: Wolves in Switzerland: Facts, politics and the limits of hunting and Valais wolf statistics: Figures of a massacre

Shy of people: What research actually shows

In the last 50 years, there has been no fatal wolf attack on a human in Western Europe. The risk of being killed by a dog, a cow, a horse, or lightning is many times higher. Studies on wolves' fear of humans show that wolves have a deeply ingrained avoidance response towards people.

Behavioral studies document that wolves react more strongly to recordings of humans than to dog barking. Telemetry data shows that wolves systematically avoid human settlements and heavily frequented paths, especially during the day. The research wolf "Andrea" in Carinthia (GPS collar, University of Udine, project valued at €250,000, data documented from February 2026) provides further data on spatial use in human-influenced landscapes.

The political narrative of the "problem wolf" that approaches humans and threatens settlements contradicts this data. What is classified as "obvious behavior" is generally the presence of a wolf in an area also used by humans. In a densely populated cultural landscape like Switzerland, sightings are unavoidable, and unavoidable does not mean dangerous.

The 2008 Wolf Management Plan for Switzerland defines damage thresholds (25 attacks per month or 35 attacks over four months) above which culling can be authorized. These thresholds refer to livestock damage, not to dangers to humans. The conflation of livestock protection and human protection in political rhetoric is a deliberate strategy of fear management.

More on this topic: Livestock protection in Switzerland and media and hunting issues

Political reality vs. ecological evidence

Swiss wolf policy is not based on ecology, but on a political compromise between the agricultural lobby, recreational hunting associations, and an administration that prioritizes conflict avoidance over scientific evidence. The ecological function of the wolf—trophic cascades, browsing damage reduction, carcass ecology, and population strengthening—is not mentioned in any Federal Council message, any consultation by JagdSchweiz (the Swiss hunting association), or any cantonal culling order.

In Valais alone, 27 wolves were killed in 2025, the Simplon and Chablais packs were completely eradicated, and 7 young wolves were shot as part of basic population control measures. 13,390 working hours and around one million Swiss francs were invested in these measures. At the same time, not a single franc was invested in researching the ecological impact of wolves on Valais' protective forests. The canton of Graubünden shot 35 wolves in 2025. Nationwide, according to CHWOLF, 92 wolves were killed during the second population control period.

The Bern Convention explicitly stated in October 2024 that preventative culling without concrete evidence of damage is illegal. The Council of Europe unanimously opened an investigation against Switzerland in December 2024. The EU's downgrading of wolf protection in 2025 was criticized by over 700 scientists as "premature and flawed," and the Large Carnivore Initiative for Europe (LCIE) described the measure as scientifically unjustified.

Political reality reveals a clear pattern: ecological evidence is systematically ignored when it contradicts the narrative of culling wolves. The question is not whether the wolf is ecologically valuable; research has answered that question. The question is whether Swiss politics is prepared to prioritize evidence over lobby interests.

More on this topic: How hunting associations influence politics and the public , and the hunter lobby in Switzerland: How influence works

The competitive narratives of recreational hunting

Why is the recreational hunting lobby reacting so vehemently to the wolf's return? The ecological answer is simple: the wolf is a natural competitor of the recreational hunter. Both claim the same prey animals—deer, roe deer, chamois, wild boar—but with opposing selection patterns and opposing ecological effects.

Hobby hunters shoot the strongest and most visible animals, while wolves prey on the weakest. Hobby hunters remove biomass from the ecosystem, while wolves leave it in place. Hobby hunters hunt seasonally and within specific territories, while wolves hunt year-round and territorially. In areas where wolf packs establish themselves, experience shows that the hunting success of hobby hunters decreases because the ungulates become more cautious, retreat to more inaccessible areas, and shift their activity patterns.

For recreational hunters, whose self-image hinges on kill quotas, trophies, and the narrative of the "necessary regulator," this poses an existential threat. If the wolf assumes this regulatory role, the core legitimacy of recreational hunting disappears. Therefore, in the communications of JagdSchweiz (the Swiss hunting association), the wolf is framed not as an ecosystem actor, but as a "damage-causer" and "problem animal," and this is why the lobby invests more in the political campaign against the wolf than in the ecological research of its function.

The cantonal initiative “Wolf finished, fun!” from 2016, which was approved by the UREK and described by Pro Natura as an “extermination attempt”, illustrates this dynamic: It was never about livestock kills (for which there is herd protection), but about control over the habitat.

More on this topic: Psychology of hunting and fox hunting without facts: How Hunting Switzerland invents problems

What would need to change

Scientific monitoring of ecological impacts: In no Swiss canton are the ecological effects of wolf presence systematically researched. Long-term monitoring, funded by the Federal Office for the Environment (FOEN), is needed to document browsing trends, vegetation structure, scavenger populations, and biodiversity in wolf territories and compare them with control areas without wolf packs.
Ecological expertise in wolf policy: Shooting orders are issued by cantonal hunting authorities that employ neither ecologists nor population biologists. Every regulatory decision must be based on an independent ecological assessment that evaluates the impact on pack structure and the ecological function of the wolf.
Abolishing political targets: Setting a "desired" number of wolf packs (Darbellay: 11→3) has no ecological basis. Population targets must be based on the conservation status and ecological carrying capacity, not on the political acceptance of the recreational hunting lobby.
Integrating the wolf into the protective forest strategy: The wolf must be recognized in cantonal and federal protective forest concepts as an ecological regulator of browsing damage. As long as protective forests cost millions for artificial reforestation while this natural regulator is simultaneously being shot, policy remains ecologically inconsistent.
Livestock protection before culling: No culling without documented proof that all reasonable livestock protection measures have been exhausted. The Wolf Switzerland 2008 concept stipulates this, but it is systematically ignored in practice.
Transparency regarding misidentifications and pack impacts: The misidentifications in 2022 (Marchairuz alpha wolf, Moesola alpha male, Wallis wolf not authorized for removal) must be fully investigated. Each cull must be documented with a follow-up analysis of pack stability and ecological impacts.

Sample proposals: Sample texts for proposals critical of hunting and sample letter: Appeal for change in Switzerland

Argumentation

"The wolf has no place in densely populated Switzerland." Wolves have lived in Europe for millennia, including in densely populated regions. France, Italy, Germany, and Spain prove that wolves can coexist in cultural landscapes. Switzerland is no more densely populated than parts of northern Italy or southern Germany, where packs are established. The question is not whether there is space, but whether the political will for coexistence exists.

“Wolves don’t regulate themselves; they reproduce uncontrollably.” Wolf populations demonstrably regulate themselves through territorial behavior, reproductive adaptation, and natural mortality. No “uncontrolled reproduction” has been documented in any European country. What is portrayed as an “increase” is the natural spread of a species that was previously extinct into available habitats. Once territories are occupied, the population stabilizes.

"The wolf endangers wildlife populations and recreational hunting." The wolf alters the population structure and behavior of ungulates; it does not eradicate them. In areas with wolf packs, hunting quotas decrease because the animals become more cautious, not because they disappear. The fact that recreational hunters perceive this as a threat only confirms the competitive motive: it's not about ecology, but about leisure interests.

"The Yellowstone findings cannot be extrapolated to Europe." Trophic cascades are not limited to Yellowstone. Studies from the Polish Carpathians, the Italian Apennines, the Scandinavian boreal forest, and the Swiss National Park document comparable effects. The intensity varies, but the principle is universal: apex predators shape ecosystems from the top down, and their absence leaves gaps that no amount of recreational hunting can fill.

"The wolf is not endangered; its population needs to be regulated." A favorable conservation status for a species is a legal prerequisite for any regulatory measure. In Switzerland, this status has not been achieved for the wolf. The Bern Convention and the Council of Europe have classified Swiss regulatory practices as legally problematic. Over 700 scientists have criticized the EU's downgrading of the wolf's status. Anyone who says "regulate" but means "decimate" should know the difference.

Quick links

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Our claim

This report does not aim to glorify the wolf as a wonder animal. Its aim is to summarize the ecological research that demonstrates why the wolf is valuable for Swiss biodiversity, forests, and ecological balance, and to contrast this research with the political reality that systematically ignores these findings. The Yellowstone research is not a fairy tale, and the trophic cascades are not wishful thinking. But they are also not automatic: for the wolf to fulfill its ecological function, it must be allowed to live. A policy that kills 92 wolves in a single regulation period while simultaneously claiming to be protecting species is scientifically unsound.

Anyone who knows of studies, data, or observations regarding the ecological function of wolves in Switzerland should contact us. We are particularly interested in: documentation on browsing damage trends in wolf territories, sightings of scavengers at wolf kills, and long-term data on ungulate distribution.

More on the topic of hobby hunting: In our dossier on hunting, we compile fact checks, analyses and background reports.