did you know: A female ostrich shows remarkable ability to recognize her own eggs even when mixed in with those of other females in their communal nest. Ostriches are so powerful that a single kick at a predator, such as a lion, could be fatal. Ostriches stretch out their neck and lay their head on the ground to keep from being seen, hence the myth that ostriches hide in the sand. Ostrich is the largest and heaviest living bird. It is unable to fly and does not posses a keeled sternum (breastbone) common to most birds. Ostriches can run up to 70km/hr(40 mph) and can outpace most pursuers, such as lions, leopards, and hyenas. Ostriches do not bury their head in the sand. When fully grown an ostrich has one of the most advanced immune systems known to mankind. Ostriches have the best feed to weight ratio gain of any land animal in the world. They are successfully farmed in at least 50 countries; from the coldest climates of Alaska to the equatorial areas of central Africa. Ostriches are not an endangered species; there are at least 2 million worldwide. striches skeletons and fossils have been found which date back over 120 million years; ostriches are a true dinosaur. There are 3 main species of ostriches of which only one, the Struthio Camelus Domesticus (the African Black), is found in captivity. Ostriches cannot fly.