yeah, I heard about that though never paid much attention to it ... I have no clue. I could do some research...
Some experts said the most likely cause of the die-off was a deliberate poisoning. "It happens quite frequently," said Greg Butcher, director of bird conservation at the National Audubon Society in Washington.
Grackles are a crowlike bird regarded as a major pest in Texas, with Austin sidewalks sometimes covered in their droppings.
honestly, I can see someone doing that ... the grackles are mean and annoying birds ...