The Grackle might think you are a source of food. There is no reason to look for a supernatural or symbolic meaning to an ordinary occurence.

female boat-tailed grackle http://www.schmoker.org/BirdPics/Photos/Blackbirds/BTGR2.jpg

Either the boat tailed or great tailed grackle of the U.S. south. Both are about the same length, the great tail maybe a little longer. Up to eighteen inches in length.

A grackle bird may be found splashing around in a grackle pond. Grackle birds are very homely, and mostly stay around their home pond. Find a local grackle bird pond, and most likely, one will also find a grackle bird.

Yes, you can eat grackle. I have eaten it and it tasted great. I prepared it by just cooking it in butter and sprinkling Season All on it. I've actually eaten blue jay as well.