鸵鸟属
鸵鸟属(学名:Struthio),是鸵鸟目下的一个属。
在这个属之下,有十个已知物种,其中八种已经绝种。There are five more possible species of which trace fossils have been found. They are:
Fossil records and egg shell fragments show that the ancestors of this genus originated about 40-58 million years ago (mya) in the Asiatic steppes as small flightless birds. The earliest fossils from this genus are from the early Miocene (20-25mya), and are from Africa, so it is proposed that they originated there. Then by the middle to late Miocene (5-13mya) they had spread to Eurasia. By about 12 mya they had evolved into the larger size of which we are familiar. By this time they had spread to Mongolia and, later, South Africa.