SINGAPORE - A scrumptious carrot cake, studded with blueberries and topped with a healthy nut-based icing. This was a specially prepared cake for the Singapore Zoo's Ah Meng the orang utan for its sixth birthday, which falls on Wednesday (March 8).

And it is a healthy cake for the conservation ambassador, too. The non-dairy and low-sugar confection adhered to strict specifications from the zoo's animal nutritionist, said Wildlife Reserves Singapore in a release.

Besides the surprise treat for Ah Meng, its carers and zoo guests also sang a birthday song.

Previously named Ishta, the birthday girl was renamed Ah Meng last year in memory of its grandmother, an iconic mascot of the Singapore Zoo.

The elder Ah Meng died aged 48 - the rough equivalent of 95 human years - in 2008 and was well-loved by both staff and visitors at the zoo.

The younger Ah Meng was chosen to assume its grandmother's name as it bore a "striking resemblance" in both looks and mannerisms to its namesake. This included a shared love for durian and cleanliness.

A video of the younger Ah Meng's birthday celebration was also streamed live on the Facebook page of Wildlife Reserves Singapore, racking up over 2,600 views as of 5pm.