The history of birds follows next, the very largest of which, and indeed almost approaching to the nature of quadrupeds, is the ostrich of Africa or ?thiopia. This bird exceeds in height a man sitting on horseback, and can surpass him in swiftness, as wings have been given to aid it in running; in other respects ostriches cannot be considered as birds, and do not raise themselves from the earth. They have cloven talons, very similar to the hoof of the stag; with these they fight, and they also employ them in seizing stones for the purpose ............