Highest living tigers found in Himalayas
20 September 2010 Last updated at 08:25 BST
Television footage shot by the BBC's Natural History Unit has provided the first evidence that tigers can live and breed at extremely high altitudes.
The team filmed the animals, normally found in jungle habitats, more than 4,000 metres high in the Himalayas.
Experts say the discovery could make it easier to create a conservation corridor, linking populations of the endangered felines across Asia.
Jon Kay reports.
Lost Land of the Tiger will be broadcast on BBC One at 21.00BST on Tuesday 21st, Wednesday 22nd and Thursday 23rd September.