Struthio anderssoni

Struthio anderssoni, also known as the East Asian ostrich, is an extinct species of ostrich that lived in the Pleistocene and Holocene in China and Mongolia. In 2023, based on a re-examination of cast of a femur, it was suggested that this species be moved the genus Pachystruthio.

Description
Struthio anderssoni was a large ostrich with an estimated mass of 270kg, laying eggs of up to 2400 cm3 in volume.