鸵鸟、鸸鹋都是我们非常熟悉的体形庞大的不飞鸟,因其不能飞只能走,所以称为走禽。这里说的恐鸟也是大型不飞鸟,恐鸟的体形比鸵鸟、鸸鹋大得多。科学家发现恐鸟的祖先是恐龙,它虽然已经灭绝,但身后给我们留下了许多的疑问。 Ostrich, 鸸 鹋 are we are very familiar with the shape of a large non-flying birds, because they can not fly can only go, so called walking birds. The panic bird here is also a large non-flying bird, which is much larger than an ostrich. Scientists found that the ancestors of dinosaurs are dinosaurs, although it has been extinct, but left behind us a lot of questions.