Clouded Leopard Cub

A clouded leopard at the Smithsonian’s National Zoo’s campus in Front Royal, Va., gave birth to a genetically valuable litter of two cubs on Valentine’s Day—Sunday, Feb. 14. Staff had been on a pregnancy watch of the 3 1/2-year-old clouded leopard Jao Chu (JOW-chew) for four days. Jao Chu gave birth to the first cub at 6:04 p.m.

Genetic analysis can give researchers a wealth of information about an individual animal or an entire population. But when the animal is wild, dangerous and rare, it can be difficult to obtain the best sources of DNA, which would usually mean capturing the animal to get a blood or tissue sample.