Saiga antelope have experienced catastrophic mass mortality events killing hundreds of thousands of animals in days, with welfare implications that have prompted new conservation and disease monitoring approaches.
Mass mortality events in wildlife are extreme welfare crises compressed into very short time periods. The 2015 saiga die-off involved over 200,000 animals dying from internal hemorrhage and organ failure within days — a welfare event of a scale and intensity that is difficult to fully comprehend. Individual animals in mass die-offs experience acute suffering before death. The mechanism — climate-triggered bacterial activation — suggests that warming temperatures will make such events more frequent. While direct intervention during mass mortality events is essentially impossible at this scale, climate change mitigation and monitoring programs that enable faster disease response address the underlying drivers.