The two oldest residents of the Philadelphia Zoo are brand new parents to four hatchlings — a major milestone for this critically endangered species.

At the Philadelphia Zoo, four Galapagos tortoises were born, and their mother is a 97-year-old female named Mommy. The Philadelphia Zoo proudly announced the birth of four Galapagos tortoises, marking the first such event in the zoo's more than 150-year history.

There are a few new arrivals at the Philadelphia Zoo, and these ones are making history. Four critically endangered Western Santa Cruz Galapagos tortoises hatched for the first time in the Zoo’s 150+ year history.