UK’s Chester Zoo has shared a video on their official YouTube Channel of rare Sumatran tiger cubs being born at the zoo.

“We’re delighted to share that two adorable rare Sumatran tiger cubs have been born here at the zoo! Our hidden cameras captured first time mum Kasarna and her new arrivals soon after birth on January 7. Kasarna is doing a fantastic job, keeping the duo protected and hidden in their den, but our experts expect them to be out and about in early April when they become bigger and stronger,” ChesterZoo said.

The Sumatran tiger is a subspecies of tiger native to the Indonesian island of Sumatra. It’s the smallest of the tigers, possibly because it evolved on an isolated island habitat. The Sumatran tiger’s stripes are closer togther and its fur is a darker orange than other subspecies, better allowing it to blend into its tropical rainforest habitat, according to National Geographic.