After a female tortoise is fertilized, she undergoes several changes. After mating, the female tortoise will carry eggs for weeks to months, depending on the species. As the female tortoise gets ...

Speedy was always assumed to be male by her owners of 41 years, so when she laid four eggs, they were shocked. Jill Mancino said the tortoise "displayed male tendencies" of "head butting" and ...

A pair of nearly 100-year-old tortoises have welcomed four baby hatchlings at the Philadelphia Zoo. "All are doing well, eating and behaving appropriately," a Philadelphia Zoo spokesperson told "Good ...

An occasional series where Mongabay founder Rhett Ayers Butler shares analysis, perspectives and story summaries. She moved ...

Gramma, who died at the zoo on Thursday, was believed to have been born in 1884, when Chester A. Arthur was in the White ...

Spotting a Mojave Desert tortoise is increasingly difficult in the American Southwest. The tortoises, with their unmistakable domed patterned shells, live in California, parts of Nevada, Arizona and ...

Zoo officials said she came from the Bronx Zoo in either 1928 or 1931 as part of their first group of Galápagos tortoises.