Five Siberian tiger cubs, one percent of the endangered species' global population, were born at Six Flags Wild Safari in New Jersey last month, the amusement park and zoo said in a statement on Thursday.

Nadya, a Siberian tiger, gave birth to the odd brood on May 2, according to Six Flags. Her birth is noteworthy both for its size and the species because most tiger deliveries only result in two to four pups.