Two male ostriches, a female, and an ostrich egg.
Ostriches are neutral mobs that spawn in desert or plains biomes in groups of about 2 to five, sometimes contaning ostrich chicks, if you pick up an egg the male ostrich will attak you. Ostriches can be tamed and ridden. They were added in the 3.6.2 update of the Mo' Creatures Mod. There are regular ostriches and albino ostriches, which are rarer. Males have black wings and females have brown wings. When females are hit, they put their heads in the ground. Males spread their wings and become aggresive to the player when hit.