I've only heard it 3-4 times. About 5 years ago, I had one hang up about 10 yards behind me on a small fallen pine tree. He walked back and forth for 20 minutes 15 of those were very loud. Almost like a hummingbird flying past you. I could see him and tried to inch around every time his tail was blocking for me when he was walking away from me. I never could get a clean shot but it is one of my best memories.