As Cop17 kicks off, records since 1921 show more bee species declining than increasing in all parts of Europe except the Alps

Most of Europe’s wild bee species and about half of its hover fly species have declined over the last century, a study has found, as a UN biodiversity summit begins in Armenia.

Records since 1921 show more bee species are declining than increasing in all parts of Europe except the Alpine region. The richness of bee and hover fly species suffered a persistent drop in the Atlantic and Continental regions, the study found, though trends in other regions were mixed or even positive.

As Cop17 kicks off, records since 1921 show more bee species declining than increasing in all parts of Europe except the Alps

Most of Europe’s wild bee species and about half of its hover fly species have declined over the last century, a study has found, as a UN biodiversity summit begins in Armenia.

Records since 1921 show more bee species are declining than increasing in all parts of Europe except the Alpine region. The richness of bee and hover fly species suffered a persistent drop in the Atlantic and Continental regions, the study found, though trends in other regions were mixed or even positive.

Should this be seen as the Hans Christian Andersen story, in which the narcissistic emperor is finally exposed as a naked fool by a truth-telling child? Donald Trump is certainly all of these things: narcissistic, naked in his support for Putin and a fool. But the parallel doesn’t quite work because it hasn’t taken a […]

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Four years ago nearly every government on Earth agreed to protect nature. Now, as countries gather for Cop17, the pressure is on to follow through on those commitments

• Cop17 at a glance: everything you need to know about the UN’s nature summit

Passersby could smell the dead fish before they saw them. In August, more than 3,000 pike, roach, carp and rudd were found lifeless along the River Wensum in Norwich. Some gasped for air in their final moments, desperate for the oxygen that heatwave conditions had depleted in the water. Investigators believe that the die-off was triggered by heavy rainfall that flushed through high concentrations of pollution at a time when wildlife were already struggling.

The 45-mile (70km) chalk river is one of about 250 in the country. They are a geological accident almost unique to Britain – and one of Earth’s rarest habitats. They emerge from chalk aquifers and are home to species such as freshwater shrimp, otters and stoneflies, also providing drinking water for millions of people. But just 11 have formal protection, with many ravaged by sewage pollution and overextraction. The Norfolk river is one of the few that does have legal protection, but it is in poor ecological health.

This month’s biodiversity summit in Yerevan, Armenia, aims to push governments to meet the 23 targets agreed at Cop15 in 2022

• Can countries deliver on a deal to save the world’s plants and animals?

This month, nearly every country on Earth will return to the question of how to stem the rapid destruction of the natural world. Humans are driving it, but so far we have not found a way to stop it.

In late 2022, governments reached an ambitious once-in-a-decade deal to better protect nature amid scientific warnings that the planet is going through the largest loss of life since the extinction of the dinosaurs. Now, they are assessing their progress on the targets for the first time.