The Philadelphia Zoo, where the tortoise named Mommy laid her eggs, said it was ‘overjoyed’ over the arrival of the four hatchlings, a first in its more than 150-year history.
The babies are the offspring of Mommy and male tortoise called Abrazzo, the zoo’s two oldest residents.
The quartet is being kept behind the scenes inside the Reptile and Amphibian House for now, ‘eating and growing appropriately’, the zoo said. They weigh between 70 and 80 grams, about the weight of a chicken egg.
The first egg hatched on February 27, with more eggs that are yet to hatch being monitored by the zoo’s animal care team.
President and chief executive Jo-Elle Mogerman said: ‘This is a significant milestone in the history of Philadelphia Zoo, and we couldn’t be more excited to share this news with our city, region and the world.
‘Mommy arrived at the Zoo in 1932, meaning anyone that has visited the Zoo for the last 92 years has likely seen her.
‘Philadelphia Zoo’s vision is that those hatchlings will be a part of a thriving population of Galapagos tortoises on our healthy planet 100 years from now.’
The Philadelphia Zoo, where the tortoise named Mommy (pictured) laid her eggs, said it was ‘overjoyed’ over the arrival of the four hatchlings, a first in its more than 150-year history
The first egg hatched on February 27, with more eggs that are yet to hatch being monitored by the zoo’s animal care team
The quartet is being kept behind the scenes inside the Reptile and Amphibian House for now, ‘eating and growing appropriately’, the zoo said. They weigh between 70 and 80 grams, about the weight of a chicken egg
Mommy is considered one of the most genetically valuable Galapagos tortoises in the Association of Zoos and Aquariums’ (AZA) species survival plan.
Her mating with Abrazzo, whose records go back all the way to 1929 when he lived in a Texas zoo, had been carefully orchestrated.
‘It’s a very fancy matchmaking service that involves a team of geneticists, population biologists, animal-care and husbandry specialists and veterinarians,’ Rachel Metz, the zoo’s vice president of animal well-being and conservation, told the Washington Post.
‘They look at the genetic makeup of each individual and the representation of those specific genetics.’
Mommy and Abrazzo were introduced in 2022, but the female tortoise didn’t lay eggs until November last year.
Mommy is also the oldest first-time mother of the Western Santa Cruz Galapagos species. The last clutch of such tortoises to hatch at an AZA-accredited zoo was in 2019 at Riverbanks Zoo and Garden in Columbia, South Carolina.
The Philadelphia Zoo is planning a public debut of the hatchlings on April 23, as well as a naming contest
The hatchlings are living separately from the adults for now due to their young age and small size, as the adults could accidentally crush them
The San Diego Zoo, Zoo Miami and Honolulu Zoo also have breeding pairs of the reptiles.
The Philadelphia Zoo is planning a public debut of the hatchlings on April 23, as well as a naming contest.
The hatchlings are living separately from the adults for now due to their young age and small size, as the adults could accidentally crush them.
‘They will not be in yard yet because they’re far too small. The yard is obviously designed for 300- or 400-pound animals, not half-a-pound animals,’ Metz said.