For her keepers, Puan's importance went beyond just awards and statistics.
Puan, the 62-year-old grand dame of Perth Zoo, was put to sleep.
"You always knew where you stood with Puan, and she would actually stamp her foot if she was dissatisfied with something you did".
"As hard as it was for us, it was the right thing to do", Martina Hart added.
Buan was treated to the sight of Sumatran orangutans, which, to date, there are about 14.6 thousand.
In an op-ed to the West Australian, zookeeper Martina Hart remembered Puan as "the maker of the most fantastic nests, and the lady who took no nonsense from her children over the years, but was also the most nurturing mother we had".
The orange apes are solitary but social animals and tend to live in small groups until they reach adulthood.
With many species living in rainforests, the cutting down of millions of acres of forest to supply the increasing demand for timber or to clear land for agriculture is destroying their habitat and making populations more fragmented.