I've heard them too. Very weird til you get used to it. My daughter worked at a horse farm one summer and they had a pair of peacocks running around. Each morning when I dropped her off...the male, whom we named "George" would call out and come over with his tail feathers all fanned out for her. The mornings when she would give me a hard time about getting out of bed and going ..I would tell her that George will be devastated if she doesn't show up. That usually would get a laugh and she would get up and go.