The grim reason so many swans are dying in London at the momentThe death of birds in the Grand Union Canal is caused by avian botulism, leading to paralysis and drowning.
Cause of death revealed after dozens of swans and other birds die in London canalBotulism toxicity is the cause behind multiple bird deaths in London's Grand Union Canal.
Dozens' of swans found dead in London canal with Defra investigation launchedOver 25 swans found dead in London canal, raising concerns over potential pollution or poisoning.
Cause of death revealed after dozens of swans and other birds die in London canalBotulism toxicity is the cause behind multiple bird deaths in London's Grand Union Canal.
Dozens' of swans found dead in London canal with Defra investigation launchedOver 25 swans found dead in London canal, raising concerns over potential pollution or poisoning.
Spate of bird deaths in canal under investigationInvestigation underway into bird deaths in West London, with conflicting views on the cause: pollution or avian flu.