Sage (18 November 1991 - April 2009, aged 17) was a female siamang gibbon.
She was born at Twycross Zoo and was later moved to Monkey World. As part of a breeding programme, Sage was paired with a male siamang gibbon named Sam, who came from Banham Zoo.
On 19th September 2000, Sage gave birth to her and Sam's son Onion. Due to birth complications, Onion was born via c-section.
Sage passed away in April 2009.