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Shame for giving up.
It took five months, and at least the same amount of research, to find out what a pier died of at Kungsängsesplanaden this summer.
But now the Swedish Veterinary Institute has an answer: caffeine.
Photo: Uppsala Municipality
The first dock that lay dead on Kungsängsesplanaden this summer had ingested caffeine.
In early July, the Swedish Veterinary Institute, SVA, examined a pier that died at Kungsängsesplanaden in Uppsala. It had been next to a dozen dead docks, according to a passerby who informed the municipality of the death of birds.
But when the ranger arrived, there was only one dock left. At that moment. A couple of months later, two more dead springs lay on the ground in the same area. They were also sent to SVA.
Various causes of death were ruled out
However, the laboratory could not answer what the birds died of. A number of diseases caused by, among others, the avian influenza virus, West Nile virus and Usutu virus could be ruled out and there were no signs of inflammation or infection in the first case.
“The only thing we have been able to see on microscopic examination are changes at the cellular level in the kidneys, which means that we cannot rule out poisoning,” Caroline Bröjer from SVA told Aftonbladet.
To find out if the bird actually died from poisoning, the samples were sent to a laboratory in France. But even there they could not find the cause of death that SVA has now reached.
Examined various topics
With the help of a new detection method, researchers have been able to search for various substances in the bird. Among other things, caffeine, as it turned out, reports SVT News. Kajor cannot absorb more than 25 milligrams.
– Most likely when there are a small number of birds, they have found a garbage bag with food scraps and perhaps coffee grounds, says Henrik Uhlhorn, the canal’s deputy state veterinarian.
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