An ostrich is a bird. ... No, ostriches aren't mammals because they don't have fur like animals and and they don't have teeth like mammals do. They do not nurse their young, as mammals do. Ostriches, though they don't fly, are classified as birds .
The ostrich or common ostrich (Struthio camelus) is either one or two species of large flightless birds native to Africa, the only living member(s) of the genus Struthio, which is in the ratite family.
Ostriches can run at speeds of up to 43 miles per hour, but they are no match for the cheetah, which tops out at 75 miles per hour.Oct 2, 2015