The Ostrich is a huntable animal in Age of Empires II HD: The African Kingdoms. Just like Deer, Ostriches run away when hunted and take two arrows to be killed. They come in packs of at least three. It is advisable to either push them towards a Town Center or Mill with a military unit or build a Mill nearby and hunt them with at least two Villagers in order to save time. Ostriches appear on African maps.
Even though Ostriches were native to Egypt (and are native in Savannahs, which appear in Age of Mythology) during ancient times (Age of Empires, Age of Mythology) they do not appear, most likely due to creative, or design reasons.