Recently, a koi fish at the San Diego Zoo underwent a medical procedure, to remove masses from its body.

At a quiet, off-view area at the San Diego Zoo Safari Park, wildlife care staff are celebrating a momentous milestone—the hatching of an endangered lappet-faced vulture chick.

How, in fact, do we count tigers?

Scientists at San Diego Zoo Global’s Frozen Zoo® have achieved a major milestone in saving wildlife species: This unique collection of genetic material now contains 10,000 individual cell lines from more than 1,100 species and subspecies—some of them critically endangered.