Sumatran Tigers are a critically endangered subspecies, with fewer than 500 individuals remaining in the wild. Found only on the Indonesian island of Sumatra, they are the smallest tiger subspecies, weighing up to 120 kg.

Habitat loss and fragmentation, human-tiger conflict, and poaching have been largely responsible for the decline of this species. There are a number of ongoing efforts to support Sumatran Tigers. Anti-poaching forrest patrols, the removal of snares and traps, and education to prevent human-tiger conflict are all effective measures. Despite these efforts, the number of wild Sumatran Tigers continues to decrease, highlighting the need to improve conservation efforts.

The National Zoo & Aquarium is home to 2 Sumatran Tigers: Aceh and Ndari who are part of a regional breeding program.