UK households are being urged to take immediate action in their gardens as the lethal mosquito-borne Usutu virus threatens to decimate blackbird populations across the country. Ecologists are appealing to families to implement minor changes that could significantly aid in safeguarding one of our most cherished garden birds.

Statistics have shown a 40% drop in blackbirds in Greater London since the virus was first identified in 2020 - and with climate change aiding mosquitoes in expanding their territory, experts caution that the issue is only likely to escalate.

The Usutu virus, which is transmitted by the Culex pipiens mosquito - commonly known as the house mosquito - does not harm humans in the UK, but often proves fatal to birds - particularly blackbirds, who are exceptionally susceptible to infection.

With extended summers, increased temperatures and heavier rainfall providing perfect breeding conditions for mosquitoes, ecologists warn that climate change is enabling diseases like Usutu to establish a presence in the UK for the first time.

The virus is now firmly entrenched in Britain's wild bird population and further declines in some species are anticipated unless measures are taken to alleviate additional pressures such as habitat loss and food shortage.

Ecological specialists at Arbtech are now urging families to support one of Britain's most frequent garden visitors, whose numbers are under threat.

A spokesperson for Arbtech said: "Blackbirds are more than just a familiar visitor to our gardens - they're important seed dispersers and insect predators, helping to regulate pest populations and support healthy ecosystems.

"But they're under real pressure. Diseases like Usutu virus, which can cause tremors, disorientation and even sudden death in infected birds, are an emerging threat - and many people still don't realise the impact it's already having.

"The good news is that households with even a small garden can make a real difference. Simple actions like planting native shrubs, providing clean water and avoiding pesticides all help create safer, healthier habitats for blackbirds to feed, nest and thrive."

Seven ways to help protect blackbirds in your garden

The advice provided for fostering a friendly environment for blackbirds includes growing native trees and shrubs such as hawthorn, dogwood, or elder, offering fresh water daily, avoiding harmful pesticides and chemicals, and regularly disinfecting feeders and tables to prevent diseases.

Ensure to clean all bird feeders and feeding stations at least once a week to minimise the risk of disease transmission amongst birds.

If you notice any sick or deceased birds, it's crucial to report it to Garden Wildlife Health or the Animal and Plant Health Agency (APHA), as early reporting aids in tracking outbreaks like Usutu. The symptoms of the Usutu virus in blackbirds can vary, but infected birds often exhibit signs of severe neurological and physical distress.

Typical symptoms include lethargy or weakness, loss of coordination, unsteady movement, disorientation or unusual behaviour (such as not fleeing from humans), tremors, seizures, and fluffed-up feathers - a common sign of illness in birds.

Consider creating wildlife corridors by leaving gaps in fences or planting hedgerows to assist blackbirds and other species in safely moving between gardens.

When sourcing garden products, be cautious. Imported bird boxes or bee hotels could introduce pests or pathogens.

Opt for UK made or naturally sourced items where possible.