Summary
A new disease carried by mosquitoes, called Usutu virus, is spreading in the UK and affects blackbirds, leading to a noticeable decline in their population. Scientists are studying how the disease spread rapidly across southern England and are concerned climate change might make these conditions worse.
Key Facts
- Usutu virus is spread by mosquitoes and has affected blackbirds in the UK since 2020.
- The virus originally appeared around southern Africa and was first found in Europe about 30 years ago.
- In the UK, it has spread across much of southern England, affecting areas as far west as Dorset and north to Cambridgeshire.
- Researchers have observed a 40% decline in blackbird populations in some areas like Greater London since Usutu was found there.
- Longer summers and hotter temperatures may allow mosquitoes to spread further, increasing the risk of diseases.
- Although the virus can infect humans and horses, no human cases have been reported in the UK.
- Scientists are working with the British Trust for Ornithology to gather data on blackbird numbers through volunteer birdwatching.
