You've heard of the game "Angry Birds", well, we have an angry bird in downtown Grand Rapids.  WZZM 13 has this story:

This reminds me, we had the same situation a few years ago when walking through our parking lot at 50 Monroe. A mother blackbird was very protective of her young in the bushes next to the parking lot. We had to run to our cars with the angry bird attacking. If alfred Hitchcock were alive, he could do a sequel to "The Birds".