In the first century BCE, Pliny the Elder wrote that ostriches bury their heads in the sand. This belief was old even when Pliny wrote about it. However, it's not true. Despite this, if you dream of an ostrich, it's a sign that you're "burying your head in the sand" by trying to avoid a difficult situation. It shows that you need to face up to the situation, and deal with it calmly and rationally. It's a sign of upward progress if, in your dream, you see an ostrich feather lying on the ground.