Wild Saiga Antelope Mass Mortality Events

The saiga antelope has experienced catastrophic mass mortality events that killed hundreds of thousands of animals within days. Understanding these events is critical for the species' survival and welfare.

Key Facts

Saiga antelopes (Saiga tatarica) are ancient ungulates that survived the last ice age and once ranged across Eurasia; today they are restricted to Kazakhstan, Russia, Mongolia, and Uzbekistan
In May 2015, approximately 200,000 saiga — over 60% of the global population at the time — died within days in Kazakhstan in one of the most dramatic wildlife die-off events ever recorded
The deaths were caused by Pasteurella multocida bacteria normally harmless in the saiga nasal passages, which became pathogenic under specific environmental conditions — likely triggered by high humidity and temperature fluctuations during a vulnerable period of calving
Similar mass mortality events (MMEs) occurred in 1981, 1988, 2010, 2015, and 2016 — suggesting episodic vulnerability rather than a one-off event
Climate change is implicated in increasing the frequency and severity of the environmental triggers for these die-offs
Saiga populations have also been decimated by poaching for horns (used in traditional medicine) and habitat fragmentation from fencing and infrastructure
Despite these challenges, Kazakhstan populations have shown remarkable recovery capacity — numbers rebounded from ~300,000 after 2015 to over 1.3 million by 2023 with strong conservation management
The saiga's highly aggregated calving behaviour — thousands of females calving simultaneously in a small area — maximises individual survival from predators but also concentrates MME vulnerability

Welfare Considerations

The welfare scale of saiga MMEs is extraordinary — hundreds of thousands of individual animals die from acute haemorrhagic septicaemia within days, experiencing fever, bleeding from body orifices, and rapid collapse. Calves born just before or during the 2015 event died alongside their mothers in scenes of profound mass suffering. The episodic nature of these events means that between MMEs, the remaining population faces ongoing welfare pressures from poaching, habitat loss, and the annual stress of long migrations across increasingly fragmented landscapes. Conservation success — demonstrated by the population recovery after 2015 — directly reduces the welfare impact on the surviving population by increasing its resilience. The elimination of illegal horn trade would be the single largest welfare and conservation intervention possible for this species.

What You Can Do

Support organisations working on saiga conservation such as the Saiga Conservation Alliance and WWF
Never purchase saiga horn products — demand reduction directly reduces poaching pressure on this species
Advocate for strong enforcement of CITES protections for saiga and equivalent wildlife trafficking laws
Support research into the environmental triggers for saiga MMEs to enable early warning systems
Advocate for wildlife-permeable fencing standards in Central Asian infrastructure development