Why do people often mistakenly believe that ostriches bury their heads in the sand when they are actually just lowering their heads to the ground to eat or check on their eggs?

People often mistakenly believe that ostriches bury their heads in the sand because they lower their heads to the ground to eat or check on their eggs. This misconception may have originated from observing ostriches with their heads close to the ground, giving the appearance that they are burying their heads.