The National Zoo’s Front Royal campus welcomed two new clouded leopard cubs on Valentine’s Day, zoo officials announced today. The cubs were born to 3 1/2-year-old Jao Chu, who gave birth to the scrunchy faced cuteness bundles a little after 6 p.m. on Sunday.

These are the fourth and fifth offspring born to Jao Chu and the cubs’ father, 3 1/2-year-old Hannibal. Two male cubs were born to the pair in March, and later, a single female cub was added to the family in July. The sex of the two new cubs is not yet known.

Clouded leopards are vulnerable to extinction, so much like their siblings, these new cubs are considered genetically valuable. More than 76 clouded leopards have been born at the Front Royal facility over the past 30 years, thanks to concerted efforts on the part of zoo scientists and their collaborators at other zoos around the world. The National Zoo is currently working to raise funds for a brand new facility to house its clouded leopard population.

These cubs won’t be on display at the Zoo here in D.C., but two clouded leopards—a male named Tai and a female named Mook—are currently part of the Asia Trail exhibit.