Neither ostriches, or flamingos bury their head in the sand.
Answer 1: yes when they sleep Answer 2: Answer #1 is a myth. Ostriches have never been documented to ever stick their heads in the sand either when sleeping or when frightened. How are they going to breathe if their heads are in the sand when they sleep? Let alone be able to hear any predators sneaking up on them. You can't hear very well when you have your head in the sand in comparison with having it tucked under your wing. So the answer to the original question is: they don't.
yes
Ostriches and Emus supposedly bury their heads in the sand when frightened, but it is not actually true.
Mythically, ostriches stick there heads in the sand when they feel they are in danger. So to behave like an ostrich is to ignore a problem in the hope that it will go away.
they are horns! :)
There is a common misconception that ostriches bury their heads in the sand to hide from danger. In reality, ostriches do not bury their heads in the sand; they lie down with their heads close to the ground to protect their eggs or themselves from predators.
Sand.
A stick in the sand can be used as a marker or indicator, to show a specific location, direction, or boundary. It can also serve as a simple tool for measuring tides or water levels at the beach. In a non-literal sense, "a stick in the sand" can symbolize impermanence or the fleeting nature of things.
no flamigos do as well
Use a magnet, it won't stick to aluminum.
yes for hunting for salmon