The saiga, a rare animal with a body like a deer and a head resembling that of a camel, has seen its numbers plummet over the past 20 years, scientists say.

Growing demand for its horns as an ingredient in traditional Chinese medicines has led to rampant poaching, driving the animal's once million-strong population down by 95 percent, experts note.

And now a new study finds yet another threat to the saiga's survival: a "bottleneck" in its migration route that is threatening its seasonal movement in search of food and water.

The results showed that the corridor connecting the saiga's two main populations was a mere three miles (five kilometers) wide and is being encroached upon by traffic from herders, trucks, and motorcycles.

WCS is working with the Mongolian government to protect this narrow corridor, Berger added, to help keep the saiga moving.