"Male Greater Roadrunners make a distinct co-coo-coo-coo-coooooo in a series of 3–8 downward slurring notes to attract or contact a mate and mark a territory."
~allaboutbirds~
THis is FAVtastic - first time I've seen one :) Mind you though, one of my daughters has a little one tattooed on her back from when she lived in Wyoming on exchange from Australia many years ago!!
Thanks so much for commenting on my photo of the roadrunner. It is New Mexico's state bird. One time Charlie saw one in a parking lot with a cigarette butt in its mouth, but he had no camera then.