Ostriches do not actually bury their heads in the sand

When an ostrich senses danger and cannot run away, it flops to the ground and remains still, with its head and neck flat on the ground in front of it. Because the head and neck are lightly colored, they blend in with the color of the soil. From a distance, it just looks like the ostrich has buried its head in the sand, because only the body is visible. http://www.sandiegozoo.org/animalbytes/t-ostrich.html http://animals.howstuffworks.com/birds/ostrich-facts.htm