Families urged to 'take immediate action' if blackbirds visit gardens

Families are being asked to take immediate action in their gardens as the deadly mosquito-borne Usutu virus threatens to wipe out blackbird populations across the country. Ecologists are pleading with families to make small changes that could significantly help protect one of our most beloved garden birds.

Figures first revealed in June showed a 40% decline in blackbirds in Greater London since the virus was first detected in 2020 - and with climate change helping mosquitoes to expand their territory, experts warn that the problem is only set to worsen. The Usutu virus, which is spread by the Culex pipiens mosquito - also known as the house mosquito - does not harm humans in the UK, but often proves lethal to birds - especially blackbirds, who are particularly prone to infection.

With longer summers, rising temperatures and heavier rainfall providing ideal breeding conditions for mosquitoes, ecologists caution that climate change is allowing diseases like Usutu to establish a foothold in the UK for the first time. The virus is now deeply rooted in Britain's wild bird population and further declines in some species are expected unless steps are taken to alleviate additional pressures such as habitat loss and food scarcity.

Ecological experts at Arbtech have called on families to support one of Britain's most common garden visitors, whose numbers are under threat.

A spokesperson for Arbotech 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 methods to help safeguard blackbirds in your garden

Make certain to cleanse all bird feeders and feeding stations at least once weekly to reduce the risk of disease transmission amongst birds.

Should you spot any ill or dead birds, it's vital to report it to Garden Wildlife Health or the Animal and Plant Health Agency (APHA), as prompt reporting assists in monitoring outbreaks like Usutu.

The signs of the Usutu virus in blackbirds can differ, but infected birds frequently display indicators of serious neurological and physical distress.

Common symptoms include fatigue or frailty, loss of coordination, unsteady movement, confusion or abnormal behaviour (such as not fleeing from humans), tremors, seizures, and puffed-up feathers - a typical sign of illness in birds. Think about making wildlife corridors by leaving spaces in fences or planting hedgerows to help blackbirds and other species move safely between gardens.

Be careful when buying garden products. Imported bird boxes or bee hotels could bring in pests or diseases.

Choose UK-made or naturally sourced items where possible.