'This year the Vulture Conservation Foundation is celebrating 20 years since the first re-introduced pair of bearded vultures successfully bred in the Alps,' Dr Alex Llopis Dell, program manager of the VCF says proudly.
Soaring in the skies above are lammergeyer, or bearded vultures, frequently hauling massive bones into the air and dropping them to the ground so they shatter and expose their highly-coveted nutritious marrow.
High in the skies, lammergeyer - bearded vultures - ride the air currents, taking marrow-filled bones up into the sky before dropping them and smashing them on the ground below, exposing the juicy marrow.
The series also looks at the extraordinary array of wildlife which lives around the river, from the Asiatic brown bears, snow leopards and bearded vultures which have made their home in the mountains, to the wild elephants that live in the foothills, to the mahseer, the largest freshwater fish in the world, that swim in its waters.
A recent census carried out by a consortium of conservation groups revealed that during the 1990s, poisoning alone accounted for the deaths of 390 griffon, 238 black, and eight lamerguier or bearded vultures.