It means to ignore something, even when that something could be dangerous to the person in question or to those on whom he/she bears responsibility.
The imagery comes from the (erroneous) belief that ostriches bury their heads in the sand. The idea is that, with one's head under the ground not able to see or hear outside, they aren't aware of what's going on: usually at a time when they SHOULD be aware.
The phrase can be used more forcefully to imply that this ignorance is intentional and that the object of the idiom is making a very poor response to a crisis.
You should stand up and take notice, don't bury your head in the sand like an ostrich.
Flamingos do not actually bury their head in the sand. It is a myth. Some also say that ostrich bury their heads in the sand, but this is also a myth.
No, ostriches do not actually bury their heads in the sand. This is a myth. Ostriches may lower their heads to the ground to eat or inspect something, but they do not bury their heads in the sand to hide from danger.
No. An emu does not stick its head in the sand. Nor, for that matter, does an ostrich.
No, ostriches do not actually bury their heads in the sand. This is a myth. Ostriches may lower their heads to the ground to eat or inspect something, but they do not bury their heads in the sand as a form of hiding or defense.
Neither ostriches, or flamingos bury their head in the sand.
As numerous as the sand of the seashore. The sands of time. Bury one's head in the sand. A rope of sand. Draw a line in the sand.
Ostriches do not actually bury their heads in the sand. This is a myth. Ostriches may lower their heads to the ground to eat or inspect something, but they do not bury their heads in the sand out of fear or to hide from danger.
The belief that ostriches bury their heads in the sand is a myth. Ostriches do not bury their heads in the sand when they are scared or threatened. Instead, they use their keen eyesight and speed to detect and evade danger.
No, ostriches do not actually bury their heads in the sand. This is a myth. Ostriches may lower their heads to the ground to eat or inspect something, but they do not bury their heads in the sand as a form of hiding or defense.
The expression "head in the sand" means someone is ignoring or refusing to acknowledge a problem or difficult situation, often by pretending it doesn't exist. It refers to the way ostriches are falsely believed to bury their heads in sand to avoid danger.
Ostriches do not actually bury their heads in the sand. This is a myth. Ostriches lower their heads to the ground to eat or inspect something, but they do not bury their heads in the sand as a form of hiding or defense.