Here is the short video about Willy, ex-captive Javan Gibbon that went back to the forest with his new family, on the International Gibbon Day. He was orphaned when he became a pet, then he was rehabilitated and formed his new family in the Javan Gibbon Center, West Java, before released to the forest.
How long the rehabilitation was? It took years and investments for wild behavioral preparedness, so they are ready when they return to the nature.
Javan Gibbon listed as Endangered on the IUCN Red List of Threatened Species (currently less than 4,000-5000 individuals in the wild). In addition to habitat loss, hunting for illegal pet trade is also a serious threat to Javan Gibbon (Nijman 2004; Supriatna 2006). Hunting one Javan Gibbon baby usually kills another 1-2 family members, as the adults were slaughtered so the poachers can sell the baby into the market. Therefore, this rehabilitation program aims to get them back to the forest, so the Javan Gibbon can support natural reforestation, which at the end, will benefits our people.
Richard Jeo's blog 