Why Do Birds Swoop Near Your Head

Do you just enjoy and nice walk on a nice sunny day? Then all of a sudden you see a bird dive right for you and wanna know how you made it mad or upset? The answer is that when you are walking and sweating you attract tiny bugs.The reason is that bugs are attracted to our body heat and when birds see a chance to find bugs they will swoop near your head but not hit your head and feed on the bugs around you.