Grackles and red-wing blackbirds round out the marauding gangs. Grackles are blackbirds, too, but they are larger and leaner looking than their red-wing cousins. Of the four gangs, the grackles are the least aggressive in my opinion. They can still be a nuisance, but come in lesser numbers and do not seem to fuss with each other or other birds as much. They are, however, quite good at gobbling down large quantities of seeds. This is a definite shortcoming when it comes to my wallet, not to mention those of farmers whose corn crops they also target.