These three rare Sumatran tiger cubs will melt your heart with their cuteness

Sumatran tigers are classified as critically endangered, with as few as 350 remaining in patches of forest on the Indonesia island of Sumatra, where their natural habitat has been devastated by illegal wildlife trade and jungle clearing for palm oil plantations. (Photo | AP)

One of the female cubs is called Mawar, which means 'rose' in Indonesian, and the other is named Tengah Malam ('midnight'). Their brother's name is Pemanah ('archer'). (Photo | AP)

The three cubs were allowed outside their closed dens to explore the more natural outdoor tiger compound at Sydney's Taronga Zoo. (Photo | AP)

Zookeeper Louise Ginman said the move from the dens to the outdoors for the cubs, which were born on January 17, posed a challenge for their mother, Kartika. (Photo | AP)

The zookeeper said that with the cubs being able to move about a larger space and learn to climb terrain, the mother will have a much harder time controlling them. (Photo | AP)

Zookeeper Louise Ginman expressed her joy at their birth, 'This birth is such a wonderful success for the conservation of this fragile species, and I am so excited that we can now invite guests to share our joy.' (Photo | AP)

Louise Ginman is hopeful for the cubs' future, 'It is such a shock that these three little cubs represent one per cent of the remaining wild population, but with zoo-based conservation programs worldwide and the support of our guests here in Sydney, there's still hope for the future of this species,' she said. (Photo | AP)