A rare rhinoceros bred at a US zoo has made a long journey to Indonesia as part of international efforts to save the species from extinction.
The rhinos have fallen prey to poachers
Andalas, the only Sumatran rhino bred in captivity in more than a century, joins two females who live in a national park on the island of Sumatra.
He was flown across the Pacific and arrived in Indonesia on Wednesday.
The Sumatran rhino is the world's most endangered rhino species with fewer than 300 thought to exist in the wild.
Andalas, born on 13 September 2001 at Cincinnati Zoo and then transferred to Los Angeles Zoo, was the first Sumatran rhinoceros to be bred in captivity since 1889.
In 2001, there were about 300 Sumatran rhinos
They live in dense tropical forest, mainly in the Malay Peninsula and Borneo
They weigh 600-950kg (1,300-2,000 lbs)
They stand at 1-1.5 metres (3-5 ft)
Source: International Rhino Foundation
"Andalas's journey to Indonesia is vital to the future of Sumatran rhinos," LA Zoo director John Lewis said in a statement on the zoo's website.
"This breeding programme is just one example of the extent zoos will go to in order to save a species from extinction," he said.
Andalas, called after the original name for Sumatra, will join two female rhinos, Rosa and Ratu, at the Sumatran Rhino Sanctuary in the Way Kambas National Park in the south-east of the island.
He travelled to Indonesia with LA Zoo's chief vet and his keeper.
After arriving in the Indonesian capital, Jakarta, he was to be taken by land to the national park, a road journey of about 12 hours.
The Sumatran rhino is the smallest and hairiest as well as the rarest of the rhino species.
There are thought to be only about 300 left in isolated areas in Malaysia and Indonesia.
The rhino population has declined by some 70% over the past two decades.
The main cause is poaching due to the demand for their horns, which are used in some traditional Asian medicines.