The hatchlings are the offspring of Mommy and Abrazzo, both estimated to be around 100 years old. Mommy, who arrived at the zoo in 1932, is now recognized as the oldest first-time mother of her species . She laid 16 eggs in November 2024, with the first hatchling emerging on February 27, 2025. The remaining eggs are still under observation.
The four hatchlings, all female and weighing between 70–80 grams, are currently being cared for behind the scenes in the Reptile and Amphibian House. They are scheduled to make their public debut on April 23, coinciding with the 93rd anniversary of Mommy’s arrival at the zoo.
This breeding success is part of the Association of Zoos and Aquariums (AZA) Species Survival Plan, aiming to preserve the genetic diversity of this critically endangered species. Prior to these hatchlings, there were only 44 Western Santa Cruz Galápagos tortoises in U.S. zoos.
Zoo President and CEO Jo-Elle Mogerman expressed hope that these hatchlings will contribute to a thriving population of Galápagos tortoises for generations to come.
For more on this remarkable event, you can watch the Philadelphia Zoo's official video:
