Rewilding is delivering "astonishingly clear" results across Scotland, with bird numbers surging 261% and breeding territories increasing 546% at sites where nature has been given room to recover, a major new analysis has found.
Researchers surveyed wildlife at more than 100 rewilding sites across Scotland and compared the results to nearby non-rewilded areas. The findings, coordinated by the conservation charity SCOTLAND: The Big Picture, provide what the organization calls "some of the strongest evidence yet that rewilding delivers measurable ecological recovery."
The Numbers
"The results are astonishingly clear," said Dr. Ross Macleod, an ecologist at Liverpool John Moores University who analyzed the data. "On rewilded land, biodiversity surged across the board."
The headline figures are striking: bird species up 261%, breeding territories up 546%. But the improvements extend far beyond birds. The variety of bumblebee and butterfly species more than doubled. Their abundance — the actual number of individual pollinators — increased more than tenfold. And the number of nectar-rich plants available to them rose by around 250%.
Reversing National Declines
Perhaps most encouraging, threatened species are recovering on rewilded land even as they decline nationally. "Species such as spotted flycatcher, cuckoo, and woodcock are relatively common on the rewilded areas, bucking the national trend of almost catastrophic declines," Dr. Macleod said.
These are species that many conservationists had feared were on an irreversible downward trajectory across the British Isles. The fact that they're thriving where rewilding has taken hold suggests the problem isn't the species themselves — it's what we've done to their habitat.
What Rewilding Looks Like in Practice
Scottish rewilding takes many forms, but the common thread is stepping back. Reduced deer grazing allows native trees like Scots pine, birch, and rowan to regenerate naturally. Peatlands are restored by blocking drainage ditches. Streams are allowed to meander rather than being channeled. In some areas, species like beavers have been reintroduced to kick-start natural processes.
The results compound over time. Young trees shelter songbirds. Wildflowers colonize open ground between saplings, feeding pollinators. Fallen wood provides habitat for insects, which in turn support woodpeckers and other species further up the food chain.
Broader Implications
The Scottish data arrives at a moment when rewilding is gaining mainstream acceptance but still faces skepticism from farming communities and policymakers who worry about land productivity. Studies like this help make the case that rewilded land isn't unproductive — it's productive in a different way, generating biodiversity, carbon storage, and flood prevention that conventional land management often destroys.
The findings also echo rewilding successes elsewhere. In the Orkney Islands, a program to remove invasive stoats has led to the highest recorded numbers of the endemic Orkney vole since monitoring began. Hen harriers and short-eared owls — both rare raptors that depend on voles — have rebounded alongside them.
For Scotland's rewilded landscapes, the message is simple: give nature space, and it comes back faster and stronger than almost anyone predicted.
