Brother and sister snow leopard kittens romped together as they made their public debut at Los Angeles Zoo.

The fuzzy siblings, born in May, explored their outdoor habitat on Tuesday as their mother, Georgina, and zoo visitors looked on.

Two endangered snow leopard cubs play in their enclosure at the Los Angeles Zoo. Credit:AP

They are the first offspring for Georgina, 3, and father Fred, 5, who were paired together in 2015 as part of a species survival plan.

"The siblings spent several months behind the scenes bonding with their mother and getting to know the animal care staff," the zoo said in a statement.