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.
All ostriches in Age of Empires II and Age of Empires III are black and white. In real life, only males have this coloration, while females are brown to camouflage better with the earth and dry grass.
In Ancient and Medieval times, ostriches could also be found in North Africa, Arabia, and the Levant.