A new study in Environmental Pollution found that the ban on bee killing pesticides resulted in measurable recovery of insect-eating birds like blackbirds and chaffinches at over 1,900 sites across France.
Bird populations in France are finally recovering after a ban on bee killing pesticides took effect four years ago. Researchers found that insect-eating birds like blackbirds, blackcaps and chaffinches increased by 2% to 3% between 2018 and 2022. This is the first study to show wildlife actually returning after Europe cracked down on these chemicals.
The banned pesticides are called neonicotinoids, which is just a fancy word for bug killers that get absorbed into every part of a plant. They’re the most widely used insecticides in the world, used on farms and even in pet flea treatments.
The European Union implemented its ban on bee killing pesticides for outdoor use in late 2018 after years of public pressure. The UK followed with its own ban the same year, though farmers can still use them in special cases. The United States never banned them, and it’s lost almost 3 billion insect-eating birds since the 1970s.
The study came out in the journal Environmental Pollution. Researchers looked at data from over 1,900 sites across France, collected by skilled volunteer birdwatchers for the French Breeding Bird Survey. Each site covered an area of 2 kilometers by 2 kilometers.
The team split their data into two periods. They compared five years before the ban, from 2013 to 2018, with the four years after it, from 2019 to 2022. They tracked 57 different bird species to see what changed.
Here’s what they found: at sites where farmers used neonicotinoids, insect-eating bird numbers were 12% lower than at sites where no one used these pesticides. That’s a huge difference when you think about how many farms use these chemicals.
Birds that eat insects were hit hardest because the pesticides wiped out their food supply. Both adult birds and their chicks need bugs to survive. Without enough insects around, parent birds can’t feed their babies properly.
Other animals are probably benefiting too. Perrot thinks small mammals, bats, and even fish might be recovering alongside the birds. These chemicals don’t just kill farm pests; they kill everything.
Birds with flexible diets, like wood pigeons and house sparrows, weren’t affected as much. They can switch to eating seeds or human food scraps when insects get scarce, so they survive better during the worst years.
Bird numbers have crashed worldwide, and multiple studies link the decline to the disappearance of insects. Neonicotinoids became widespread across Europe in the 1990s. They work by getting absorbed into plant tissues, making the whole plant poisonous to any bug that eats it.
See also: The United Kingdom to Ditch Bee-Harming Pesticides for Good
Mass bee die-offs began appearing in France and Germany in the early 2000s. Research has shown that these chemicals mess with bees’ ability to navigate and find food, even in tiny amounts. By the 2010s, dead bees became a major public concern. The EU finally implemented its ban on bee killing pesticides in 2018 despite fierce opposition from agricultural companies, especially the ones making the chemicals.
Developing countries face worse problems with pesticides because they have fewer restrictions, and nobody’s really tracking what happens to wildlife. Birds in those places are getting hammered by chemicals and habitat loss at the same time.
More sustainable farming would help birds recover faster. That means using fewer pesticides and bringing back natural habitats like hedgerows and wetlands. Some EU policies already fund this “green infrastructure,” but it’s not enough. If farming keeps chasing maximum crop yields rather than sustainability, bird populations will keep declining.
The good news is that this study proves the ban on bee killing pesticides actually helps wildlife recover. Birds are coming back in France, slowly but surely. If other countries follow the EU’s lead and crack down on these chemicals, we might see insect-eating birds recover across the globe. It’ll take time, probably decades, but it’s possible.
