Great-tailed grackles are in huge abundance in Texas. Many wake me up outside my hotel room. The evening roosts are spectacular, but the sounds the birds make is down right freaky. I tried to get a video to record the sound. Below is a great-tailed grackle puffing up and giving several clicks and whistles--it almost sounds like camera clicking or weird gears going off. In the background you can hear other great-tailed grackles calling back: