Mongolia's wildlife at risk from overgrazing

"Now there are eight herders' families on this mountain," said Daribazar Nergui, who has lost 10 of his livestock to the elusive apex predators, known as "ghosts of the mountain". But a push for more grazable land by herders seeking to expand their flocks and their earnings has brought them onto lands once reserved for wild animals, leaving them vulnerable to disease and starvation. Another species that's been threatened is the Mongolian gazelle. Long a symbol of the country's natural beauty...