UK Swan Populations Face Collapse as Bird Flu Surges
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A highly contagious avian influenza outbreak is threatening swan populations across the United Kingdom, with experts warning of a potential collapse in numbers not seen in decades. The current surge in cases, impacting both Mute Swans and Whooper Swans, is raising alarm bells among conservationists and prompting scrutiny of game farming practices.
The outbreak, which has seen higher case numbers than last winter, is especially devastating for waterfowl species. While not as widespread as the record-breaking outbreak of the previous year,the current strain of H5N1 is proving lethal to swans and geese at an alarming rate.
Mounting Swan Deaths Spark Conservation Concerns
Data from the British Trust for Ornithology (BTO) reveals a grim picture. Dr. Teresa Frost, head of waterbird monitoring at the BTO, stated, “We are keeping a close eye on the situation in wild birds, with the Animal and Plant Health Agency reporting confirmed cases in over thirty different species since the beginning of october.”
Testing has confirmed the presence of H5N1 in 131 individual Mute Swans and 28 Whooper Swans.Other affected species include Canada Geese, Pink-footed Geese, Barnacle Geese, and Greylag Geese, alongside numerous other waterbirds and birds of prey. In the last two months alone, reports indicate 155 Mute Swan deaths from 75 locations and 86 Whooper Swan deaths from 18 locations.
“Both species have been seen dying in double digit numbers at the worst affected sites across the contry,” Dr.Frost added. The BTO is actively soliciting data from volunteers, recognizing that government surveillance may not fully capture the scale of the crisis.
A recent BTO study revealed that at least 965 Mute Swans were reported dead between 2021 and 2023 with bird flu suspected as the cause. The current winter’s reports are compounding these concerns. The most recent national winter population index for Mute Swans is the lowest it has been since the winter of 1996-97, signaling a potentially notable decline at the national level.
Local Impacts and Ongoing Outbreaks
The impact of the outbreak is being felt across the country. A swan retrieved from a lake earlier this month tested positive for avian flu, according to witney Town Council, which also reported a second death at Witney Lake in Oxfordshire. Further north, six swans have died at Tongwell lake in Milton Keynes in the last two weeks, with local volunteers fearing the situation will worsen.
The crisis extends beyond wild bird populations.Avian flu outbreaks on game farms in England have cost taxpayers over £100 million since 2020, according to a Freedom of Details (FOI) request. This figure includes the costs associated with culling infected birds and providing compensation to farmers. There have been 26 outbreaks on game farms in England in the last five years.
Shooting Industry Under Fire
The financial burden on taxpayers has drawn criticism, particularly regarding the role of the shooting industry. A spokesperson for Animal Aid, which submitted the FOI request, argued, “The evidence reveals that, despite the threat of avian flu to wild bird populations, the shooting industry is profiting from the lives and deaths of the millions of birds purpose bred for shooting – either from selling them to be shot or from claiming compensation from the government following an outbreak of avian flu.”
The organization further condemned the industry as “greedy and cruel,” highlighting the potential risk posed to wild birds by the release of millions of game birds into the countryside. “It is indeed entirely reckless to continue to mass produce pheasants and partridges for shooting while there is the threat of avian flu, especially when disease transmission between captive reared birds and wild birds has been highlighted.”
The ancient right of King Charles to claim all unmarked mute swans in open waters, traditionally exercised on certain stretches of the River Thames, underscores the cultural significance of these birds and the potential loss facing the nation. Continued monitoring and a complete strategy to address both wild bird and farmed bird populations are crucial to prevent further devastation and safeguard the future of these iconic species.
