MEXICO CITY -- Shuan Shuan was 35 years old and is now deceased.
Mexico City's Environment Department reported that the panda died at Chapultepec Zoo, the capital. The cause of death was not listed by the department.
It said Shuan Shuan lived to a much greater age than her species, which was 15 years.
Wednesday's announcement by the department stated that the panda, who had been enjoying a birthday cake made of dates and apples, died on Wednesday.
Shuan Shuan was born in China in 1987. The department stated that she was the longest-lived panda outside of China's native habitat.