Definition & Meaning of "bury one's head in the sand"

What is the origin of the idiom "bury one's head in the sand" and when to use it?

The idiom "bury one's head in the sand" is often associated with the myth that ostriches bury their heads in the sand when they are confronted with danger. This, however, is not true; ostriches do not exhibit this behavior. The idiom likely originated from this misconception and has been used metaphorically to describe people who ignore or deny problems, unpleasant facts, or dangers instead of confronting them. This expression is used to criticize individuals or groups who refuse to acknowledge or address issues, challenges, or threats that are apparent to others. It implies a willful act of avoiding reality or pretending that problems do not exist. The idiom often carries a negative connotation, suggesting that such avoidance can lead to negative consequences or exacerbate existing problems.