Scientific data reveals 355% rise in deadly poison levels in Wales’s national bird

RED KITES in Wales — once saved from extinction and now a treasured national symbol — are being poisoned in shocking numbers by powerful rat toxins, according to a major new scientific report that exposes a decade-long collapse in UK and Welsh Government policy.

A review by Wildlife Poisoning Research UK (WPRUK), covering nearly 20 years of official evidence, found that red kites across Wales and England are carrying record levels of Second Generation Anticoagulant Rodenticides (SGARs) — chemicals that cause internal bleeding and death.

The findings, drawn from the Government’s Wildlife Incident Investigation Scheme (WIIS), show that 96.8% of all red kites examined had been exposed to SGARs. More worryingly, 62.9% carried potentially lethal doses in recent years — up sharply from 48.3% a decade earlier.

A chemical time-bomb in the Welsh countryside

The report reveals that mean toxin levels have soared by 136%, with the deadliest SGAR, Brodifacoum, rising by an astonishing 355% since the Government introduced its “stewardship” rules in 2015–16.

Scientific analysis in the WPRUK review shows:

• Birds begin to die when liver levels reach 0.1mg/kg
• Brodifacoum in recent samples averaged 0.2760mg/kg
• In significant poisoning cases, Brodifacoum now accounts for 73% of incidents, up from just 31% before 2014

Experts say the timing is no coincidence. In 2016, the UK Government approved the use of Brodifacoum “in and around buildings”, shifting from a previous requirement that it be used indoors only. Conservationists say this opened the door to widespread outdoor use on farms, yards and game estates — exactly where red kites scavenge.

A Welsh conservation miracle now in danger

The red kite survived in rural mid-Wales when it vanished everywhere else in Britain, with only five breeding pairs left in the mid-20th century. Decades of protection restored the species and saw successful reintroductions into England.

But the very behaviour that made the kite a symbol of revival — scavenging on dead animals — now makes it the early warning system for a countryside increasingly contaminated by rodenticides.

“This species is the barometer. And what it’s telling us is that the countryside is full of poison,” one conservation source told The Herald.

Government scheme ‘dramatically failed’

The report devastates the credibility of the Government’s Rodenticide Stewardship Scheme (RSS), launched in 2015. The scheme allowed continued outdoor SGAR use only if the pest-control industry reduced wildlife exposure.

But the Government’s own monitoring data now shows:

• No reduction in SGAR exposure
• Higher toxin levels than before the scheme began
• A steep rise in the most toxic substances
• Continued availability of dangerous SGARs to the general public

Dr Ed Blane, who led the study, said:

“Evidently this Government policy has dramatically failed and the situation is getting worse. UK and devolved Governments appear to have been collectively asleep at the wheel.”

Sold freely in Welsh garden centres

Despite warnings from regulators and scientists, Brodifacoum remains freely sold in shops, garden centres and DIY stores across Wales, often without training, ID checks or restrictions.

Product labels carry stark warnings:

• “May damage unborn children”
• “May cause damage to organs (blood) through repeated exposure”

WPRUK argues that amateur use is a major blind spot, because WIIS only investigates professional misuse — leaving most public cases unmonitored and unreported.

Other species also poisoned

WPRUK and independent research show the same trend in:

• Buzzards
• Foxes
• Peregrine falcons
• Barn owls

High-profile recent cases include:

• A white-tailed eagle found dead in Dorset in 2022 with seven times the lethal Brodifacoum threshold
• A golden eagle case in Powys suspected of SGAR involvement

“These poisons are inherently unsafe when used outdoors,” the report states, citing a US Environmental Protection Agency assessment that Brodifacoum poses the greatest risk of all rat poisons to predators and scavengers.

Welsh Government now in the spotlight

Questions The Herald will be putting to ministers this week:

• Did Wales oppose or question the 2016 rule change expanding Brodifacoum use?
• Why is the poison still sold unrestricted to the public?
• What monitoring has NRW undertaken on SGAR contamination in Welsh wildlife?
• Will Wales now consider banning amateur sales or restricting SGARs to indoor-only use?

Senior conservationists privately believe Wales is in a position to lead the UK in imposing tough new SGAR controls — but that political will is missing.

One former NRW official told this paper: “The data is overwhelming. If Wales does nothing now, it will be a deliberate choice, not an accident.”

A call for urgent change

WPRUK recommends:

• Ban amateur sales of Brodifacoum
• Restrict all SGARs to indoor-only use
• Expand WIIS investigations to include amateur misuse
• A new UK-wide regulatory framework
• Immediate Government review of all SGAR approvals

A warning from Wales’s national bird

As red kites wheel above Welsh fields once again, the report warns their future could be shaped not by persecution or habitat loss, but by a poison poured into barns, hedgerows and back gardens.

If action is not taken, scientists say the red kite revival — one of Wales’s greatest conservation stories — could enter a new era of unnecessary decline.