Choose from options: Determine if the sentence is true based on the text below:
the ostrich is a flightless bird

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. In 2014, the Somali ostrich ("Struthio molybdophanes") was recognized as a distinct species.
OPTIONS:
(I) Yes
(II) It's impossible to say
(III) No
(I)