Planet Earth crew watch in horror as 150,000 antelope drop dead in front of them over three days
'At the time we thought we were watching the greatest natural catastrophe that I’d ever heard of'
THE TV crew working on Planet Earth II were left "emotionally devastated" after watching 150,000 antelope killed off by disease in three days.
The crew thought they had witnessed the final extinction of the species while filming at calving grounds in Kazakhstan, Central Asia.
Fans of the David Attenborough series will watch scenes featuring the saiga antelope on Sunday.
Chadden Hunter, producer of the Grasslands episode, told how he thought he was watching one of the "greatest natural catastrophes" he'd ever heard of.
He said: “When we were out there in the calving grounds, with hundreds of thousands of females all giving birth at the same time, a very virulent disease swept through the population and killed around 150,000 of them in a matter of three days.
“At the time we thought we were watching the greatest natural catastrophe that I’d ever heard of. We watched 150,000 of these magnificent animals die in front of us.
"At the time we didn’t know if it was the final extinction of the species, which was devastating, emotionally, for the crew."
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Filmmakers had trekked deep into the middle of Kazakhstan for days to find the calving herds.
Hunter described seeing the animals that "look like they are from another planet" as "incredible".
But, despite the mass death, the species has not been wiped out.
Hunter said: "We’ve since heard that the last few mothers and babies we filmed have survived. It was a potent reminder of how fragile yet resilient nature can be.".
Planet Earth II has been a huge hit for BBC1.
On Sunday 9.7 million viewers tuned in to watch the desert episode, more than ITVs X Factor.