Saiga Antelope Mass Mortality Events and Welfare

Saiga antelopes experienced catastrophic mass mortality events in 2015 and 2016, when a bacterial infection killed over 200,000 animals within weeks, raising profound questions about wildlife welfare at population scale.

Key Facts

The 2015 mass mortality event killed over 200,000 saiga — approximately 62% of the global population — in three weeks
Pasteurella multocida bacteria normally resident in saiga nasal passages became virulent, likely triggered by unusual temperature and humidity
Mortality was nearly 100% in affected herds, with calves dying first followed rapidly by adults
Saiga populations had already declined 95% from Soviet-era hunting and poaching for horns
The species is listed as Critically Endangered with populations concentrated in Kazakhstan
Recovery programs have helped the population rebound but vulnerability to future mass mortality events remains high

Welfare Considerations

Mass mortality events in saiga involve suffering at a scale that challenges conventional welfare frameworks. Individual saigas dying from haemorrhagic septicaemia experience fever, internal bleeding, respiratory distress, and weakness before collapse. The speed of the 2015 event — hundreds of thousands of deaths within weeks — meant that carcasses accumulated faster than any response was possible. Adults caring for young calves continued trying to tend dying offspring. While the bacterial trigger was natural, the vulnerability of a critically endangered population with reduced genetic diversity may have been amplified by human-caused historical population bottlenecks. Climate conditions enabling the bacterial trigger are also linked to anthropogenic climate change.

What You Can Do

Support Saiga Conservation Alliance programs monitoring population health and investigating mass mortality causes
Advocate for international cooperation addressing illegal saiga horn trade that fragments and stresses populations
Back research into predictive environmental indicators that might enable early warning of mass mortality triggers
Donate to emergency response capacity for wildlife disease events in Central Asian steppe ecosystems
Learn about saiga antelope ecology and the extraordinary challenges this species faces in the modern world