If I remember correctly this is 0.1 Suli - born 15th May 2000 at Edinburgh Zoo, UK.
Darling Downs houses 2.1 Siamang - an unrelated pair and their son. The adult male is Irian who was born on 4th May 2001 at Auckland Zoo and the pair's son is Zain who was born 6th January 2009 at Adelaide Zoo. The trio moved to Darling Downs Zoo in 2017 and are currently the only gibbons in the state of Queensland.
