Transhumance is the seasonal movement of people with their livestock between different geographical or climatic regions, typically driving herds to mountain pastures in warm months and returning to lower altitudes for winter. It’s one of the oldest forms of land management on Earth, practiced across every inhabited continent, and it remains a living tradition for millions of herders today.
How Transhumance Works
The basic logic is simple: grass grows at different times in different places, so herders follow the growth. In its most common form, called vertical transhumance, shepherds move flocks uphill in spring as mountain meadows thaw and green up, then bring them back down before winter snow covers the high pastures. This pattern dominates in alpine regions across Europe, Central Asia, and parts of South America.
Horizontal transhumance follows the same seasonal principle but across flat terrain, shifting herds between latitudes rather than elevations. Siberian reindeer herders, for example, move animals between the subarctic forest and the Arctic tundra as conditions change. In sub-Saharan Africa, cattle herders migrate between wet-season and dry-season grazing zones across hundreds of kilometers of savanna.
The routes are not random. Herders follow established corridors, sometimes called drove roads or drovers’ paths, that have been used for generations. These paths connect seasonal pastures in a predictable annual loop, and the timing of each move is dictated by rainfall, snowmelt, and the condition of the grass.
Transhumance vs. Nomadism
People often confuse transhumance with nomadic pastoralism, but they’re distinct systems. The key difference is permanence. Most people who practice transhumance maintain a permanent home base, often a village at lower elevation, and many also cultivate crops there. The migration is a scheduled, seasonal round trip, not an open-ended journey. Nomadic pastoralists, by contrast, move their entire household cyclically and may not maintain a fixed settlement at all. They depend more fully on their herds and migrate in response to changing conditions rather than following a rigid seasonal calendar.
In practice, the line blurs. Some seminomadic groups in North Africa and Southwest Asia farm between seasonal moves, occupying a middle ground between the two systems. But as a general rule, if a herder leaves home for summer pastures and returns to the same village each fall, that’s transhumance.
Ecological Benefits of Drove Roads
Transhumance does more than feed livestock. The routes themselves function as ecological infrastructure. In central Spain, where drove roads have been used for centuries, researchers have found that these corridors act as biodiversity reservoirs in otherwise heavily farmed landscapes. The strips of natural grassland along the paths support more diverse plant and insect communities than the surrounding agricultural land.
At a broad scale, drove roads enhance connectivity between isolated patches of natural habitat. Livestock moving along these corridors carry seeds in their wool and digestive tracts, facilitating long-distance seed dispersal and helping plant species migrate across fragmented landscapes. The paths also serve as stepping stones for bird communities moving between habitats. At the local scale, the grassland strips provide breeding, refuge, and foraging areas for insects, including ant species that play important roles in plant community dynamics by collecting and redistributing seeds.
The width of these grassland strips matters enormously. Wider drove roads support more microhabitats and more functionally diverse communities. When roads are narrowed by encroaching agriculture or development, their ecological value drops sharply.
Why Livestock Benefit From Seasonal Movement
Keeping animals on the same pasture year-round creates nutritional problems that seasonal migration solves. Research on horses grazing a single pasture continuously found that while protein levels in the grass stayed adequate most of the year, energy content and total forage availability dropped sharply in winter. The animals lost body weight and condition during cold months, only recovering when spring growth provided a surplus. In one French study, crude protein intake from pasture fell below maintenance requirements for six months of the year.
Transhumance sidesteps this cycle by matching herds to the best available forage at any given time. Summer mountain pastures offer nutrient-rich grasses at peak growth, while winter lowlands or sheltered valleys provide more reliable forage when high country is buried in snow. Grazing itself can also improve pasture quality: grazed plots in one Swedish study showed higher energy and protein content than ungrazed plots, likely because grazing stimulates fresh, nutrient-dense regrowth.
Economic Pressures on Herders
Transhumance is in decline across much of the world, and economics is the primary driver. In Spain, the main market product of transhumant livestock has shifted from wool to meat, and the profitability of extensive, pasture-based production has fallen compared to intensive farming systems. Rural abandonment and a lack of younger generations willing to take over herding accelerate the trend. Spanish farmers consistently cite low profitability as their top concern.
Some advocates argue that creating quality seals and marketing campaigns for transhumance-raised products could help close the gap. Meat and cheese from animals grazed on diverse mountain pastures have distinct flavor profiles, and premium branding has worked for similar products in other sectors. But so far, these efforts haven’t reversed the broader economic disadvantage.
Climate Change and Adaptation
Shifting weather patterns add another layer of difficulty. In Morocco’s arid rangelands, pastoralists report significant changes in rainfall timing and intensity, forcing them to adjust strategies that once followed predictable seasonal rhythms. Large-scale herders have responded by diversifying: combining animal husbandry with grain crops, raising mixed herds of sheep and goats, stockpiling animal feed, and increasing mobility to reach favorable grazing sites as conditions shift.
Some have moved further from traditional practices, investing in real estate to hedge against climatic and economic uncertainty, orienting livestock production toward market preferences for specific physical traits, and purchasing climate insurance. Small-scale herders, however, have fewer options. During severe droughts, they face rising feed prices and increased competition for shrinking forage. Many are forced to sell part of their herds at depressed prices, take on temporary wage labor, or abandon herding entirely and migrate to cities.
Legal Protections for Migration Routes
Because transhumance depends on access to land the herder doesn’t own, legal frameworks are critical. Approaches vary widely by country. In Cameroon, all grazing lands are legally state property, and national law supports pastoralists’ open access to these resources provided they vaccinate their animals and pay taxes. The Lake Chad Basin Commission, established in the 1960s by Cameroon, Chad, Niger, and Nigeria, reinforces this system by enabling freedom of movement for pastoralists across national borders under the same conditions.
In Spain, the drove road network (the “cañadas reales”) has been protected under national legislation since the 1990s, though enforcement is uneven and encroachment remains a problem. Across Europe, some countries classify traditional migration routes as public rights of way, while others rely on agreements between individual landowners and herding cooperatives. Where legal protections are weak or poorly enforced, transhumance corridors gradually fragment, and once a route is blocked, the entire system it supports can collapse.
Cultural Recognition
UNESCO has inscribed transhumance on its Representative List of the Intangible Cultural Heritage of Humanity, recognizing it as far more than an agricultural technique. The practice carries with it specialized knowledge of weather, terrain, animal behavior, and plant ecology, along with social traditions, oral histories, and seasonal rituals tied to departure and return. For communities that still practice it, transhumance organizes the calendar, defines social roles, and connects people to landscapes in ways that few other traditions can match.