Ostriches are large flightless birds, of the genus Struthio, in the order Struthioniformes, part of the infra-class Palaeognathae, a diverse group of flightless birds also known as ratites that include the emus, rheas, and kiwis.
Ostriches
Towering over other birds, ostriches can grow up to nine feet tall, with their necks accounting for almost half that height.