In 2015, more than 200,000 saiga antelopes died in 3 weeks in central Kazakhstan. The proximate cause of death is confirmed as hemorrhagic septicemia caused by the bacterium Pasteurella multocida type B, based on multiple strands of evidence.
A multidisciplinary research team involving two ELI researchers (Julien Radoux and Florent Hawotte) in the frame of the Lifewatch infrastructure found out the factors that made this happen. This research was published in Science Advances :
http://advances.sciencemag.org/content/4/1/eaao2314