Darker frogs, resilient wolves, and radiation-eating fungi: The surprising wildlife thriving in the Chernobyl exclusion zone

For almost four decades after the Chernobyl nuclear disaster, the world saw the exclusion zone as a wasteland of radiation and decay. But today, that image is being rewritten as cameras and scientists are finding wolves, foxes, bears, beavers and even bison quietly returning to the forests around the abandoned power plant.

But why have animals started venturing into the abandoned lands?

Let’s break down

Photo : @LoyalYashFan/ X

Why was the Chernobyl exclusion zone created?

In 1986, the Chernobyl explosion released a radioactive cloud across much of Europe and led to the evacuation of about 115,000 people from a 2,600 square kilometre area around the plant. A strict exclusion zone was created, banning homes, farms, logging and most other human activities. Over the decades that followed, scientists noticed something surprising, that wildlife populations did not collapse, but instead often began to grow.


But over the years, large‑mammal numbers in the Belarusian part of the zone are comparable to, or even higher than, those in nearby uncontaminated reserves. According to several studies, the absence of hunting, farming and infrastructure has had a more positive effect on animals than the lingering radiation has had a negative one.

Wolves, bears and bison come back

According to an ABC report, within the CEZ, species such as wolves, foxes, Eurasian lynx, elk, wild boar and beavers have all increased significantly. Brown bears and European bison, which had vanished from the area long before the disaster, have also returned and established new populations. This is rewilding in its most extreme form as nature is filling the space left by humans, with almost no direct management.


Birds have rebounded as well. Black storks, white storks and white‑tailed eagles have returned to the area, and the globally endangered greater spotted eagle is now nesting in the zone, with at least 13 pairs recorded in the Belarusian sector in 2019. Scientists have noted that this region is now the only place in the world where the population of this rare eagle is growing.

Animals are adapting to the region

Some species appear to be adapting to the radioactive environment. Tree frogs in the CEZ, for example, are darker than their counterparts outside the zone, suggesting that higher melanin may help protect them against radiation damage. Research on Eurasian wolves also hints at possible evolutionary changes that might help them survive chronic radiation and reduce cancer risk.


In the plant world, certain vegetation has developed enhanced DNA‑repair mechanisms and improved tolerance for heavy metals and radiation. A black, melanin‑rich fungus discovered inside the ruined reactor even appears to use radiation as a kind of energy source, growing faster than normal fungi.

Is the area safe again

Still, Chernobyl is not a perfect paradise. Some animals show reduced reproductive success and higher mutation rates, and there are clear health costs from the radiation. Similar patterns are emerging around other nuclear sites like Fukushima, where bears, raccoons and wild boars have also returned in large numbers.