FRONT ROYAL, Va. — Officials at the Smithsonian Conservation Biology Institute in Virginia say they’ve had a baby boom of endangered species in recent months and are sending some animals to other facilities.

Two clouded leopard cubs that were born in February were transferred on Thursday to their new home at the Nashville Zoo. They will be paired with future mates at a young age to reduce the risk of aggression as they reach maturity. Clouded leopards are listed as vulnerable to extinction in the wild.

Two male maned wolf pups born in April at the Front Royal campus also have been given a clean bill of health. There are only 85 maned wolves in the Association of Zoos and Aquariums’ Species Survival Plan.

The Smithsonian also is celebrating several hatchings of endangered birds.

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