Watch | The leopard quadruplets that have sent Washington zoo into cuteness overload

An endangered clouded leopard has given birth to not one, but four adorable cubs. The healthy quadruplets, who are yet to be named, were born to mother Chai Li and father Nah Fun. The tiny leopards are being bottle-fed and will be hand-reared by zoo staff, who are providing round-the-clock care for the four at Point Defiance Zoo and Aquarium in Washington. Zoo staff says litters of four cubs are uncommon. Karen Goodrowe Beck, the zoo's General Curator, says, "We hope visitors to the zoo will connect with them and be inspired to take action to help save their species in the wild."