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?

An 8-month-old koala joey being cared for round the clock by San Diego Zoo wildlife care specialists is thriving. The male koala joey, named Omeo (pronounced Ooh-me-ooh), lost his mother due to cancer in mid-December, when he was about 5-and-a-half months old and was still in her pouch.