Det pågår pandemier mest hela tiden, men det är bara forskare som bryr sig om de inte drabbar människors samhällen. Och virusen blir vanligen mindre farliga med tiden.
En sammanfattning:
"Bird flu has caused the most significant and sudden loss of birds in decades, with some of the long-lived seabird species likely to take several years to recover. It has led to the death and mass slaughter of more than 280 million poultry birds since October 2021, based on data from the World Animal Health Information System. There is no total figure for wild bird deaths, though it is estimated to be in the millions.
It has been particularly destructive in species of birds with a small geographic spread. The first big outbreak in the winter of 2021 was among the Svalbard barnacle geese in the Solway Firth where at least 13,000 birds died: a third of the global population of that species. In March 2022, more than 2,200 dalmatian pelicans died in Greece, or 40% of the south-east European population. The UK, which is home to most nesting great skua pairs, has lost three-quarters of those on surveyed sites since bird flu struck, according to a study published in February. Across Europe, more than 20,000 sandwich terns died during the 2022 breeding season– or 17% of the population in north-west Europe – in an outbreak that killed almost all chicks within colonies. In total it has killed birds from 320 species, and mammals from dozens of species."
Se översikt per kontinent i länkad artikel.
https://www.theguardian.com/environm...break-evolving
