>More than 200,000 saiga antelopes collapsed and died suddenly in 2015, wiping out most of the global population.
>The deaths were found to be caused by a bacterial infection.
…
>Researchers think changing environmental conditions could be a trigger for the bacterial onslaught, although this needs further research.
>Study leader Prof Richard Kock of the Royal Veterinary College London was part of the original emergency response team.
https://www.bbc.com/news/science-environment-42720955