Senegal's herders test 'mob grazing' to heal drought-damaged grasslands

Ibrahima Ka stands at the edge of a 127-hectare plot in his village of Thignol, watching 350 zebu cattle and 2,000 sheep move together across parched Senegal grassland. What looks chaotic is actually carefully choreographed: the herd grazes intensely for days, then moves to fresh ground, leaving behind trampled soil and space for new growth. After 18 months, grasses unseen in decades have returned. Insects are back. Saplings are sprouting.

This is mob grazing — a practice that mimics how wildebeest once moved across African plains. The idea sounds counterintuitive in a region where overgrazing has already degraded a third of Senegal's pastures into sparse, patchy wasteland. But the mechanism is real: concentrated hooves break up the soil crust that prevents water absorption, while the animals eat only what's directly in front of them, avoiding the selective overgrazing that kills off certain species. Then, crucially, the land gets time to recover before the herd returns.

Ka didn't choose this experiment out of curiosity. The verdant pastures of his childhood are vanishing. Erratic rainfall driven by climate change, combined with too many animals on degraded land, has turned his community's grasslands desert-like faster than anyone expected. When conventional approaches weren't working, he decided to try something different.

The early results matter, but they come with a caveat. Dr. Cecilia Dahlsjö, a senior researcher at Oxford's Leverhulme Centre for Nature Recovery, is clear: mob grazing isn't a fix-all. "It can be beneficial for biodiversity, soil water absorption and structure, but if you go too far, the soil can become too trampled and compacted." Geography, herd size, rest periods, and rainfall all determine whether the approach heals or harms. There's a narrow line between regeneration and damage.

That's why the human element matters as much as the ecological one. A nearby pilot failed when herders ignored rest rules — the rhythm breaks down without collective commitment. Ka's success depends on mobilizing dozens of herders and keeping them aligned on a plan that requires patience. It's not a quick fix. Moustapha Ka, Ibrahima's brother, estimates five or six years before the landscape fully recovers. But as young shepherds in elegant robes joke and play music together during the breaks — a rare respite from the solitude of herding — there's something else happening too. The work is building community.

If this pilot holds, it could reshape how Senegal responds to grassland collapse. Not through top-down policy, but through herders experimenting with their own land, watching what works, and spreading the knowledge.