The grim reason so many swans are dying in London at the moment
Briefly

The recent spate of bird deaths along the Grand Union Canal has been attributed to avian botulism, a toxin produced by bacteria that thrives in low-oxygen environments.
The Animal and Plant Health Agency reported that outbreaks of avian botulism typically involve waterbirds, can last for weeks, and may lead to hundreds of avian fatalities.
APHA confirmed that the birds showed signs of good health before death but had not been feeding properly, indicating poisoning from botulism.
While most avian botulism in the UK generally does not impact humans, agencies warn caution around areas with dead birds due to potential health hazards.
Read at Time Out London
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