Two clouded snow leopards, a girl and boy, were born at the Denver Zoo on March 14, the zoo announced Thursday.
The unnamed cubs are the first of their species born at the zoo, according to a news release.
The cubs' mother, Lisu, gave birth to the pair in a private stall. Lisu did not tend to the cubs, however, and zookeepers moved them to another building to provide for their care. Zookeepers believe because first-time mother Lisu was hand-raised, she "lacks the experience to rear her own cubs," according to the release.
These are the first cubs for Lisu and her mate, Taji.