Ostriches, undistinguishable from Struthio, have been found in Samos and in the Sivalik Hills.
All the existing Ratitae (with the exception of the ostriches of Africa and South America, belonging to the genera Struthio and Rhea, and comprising at most but five species) are found in Austrogaea and nowhere else.
Nearly every order, except that of the Struthiones or ostriches, is well represented, and there are many peculiar genera not found elsewhere, such as Buceros, Harpactes, Lophophorus, Euplocamus, Pavo and Ceriornis.
The seventh order, Proceres, is divided into 2 " cohorts " - Veri with 2 families, ostriches and emeus; and Subnobiles, consisting of the genus Apteryx.
Ostriches are found in the open plains; the rivers swarm with crocodiles, but hippopotami are rare.