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This one was at Peck's Lake May 20th, 1999. This species gets together in a kind of lek - several calling at once, and occasionally flying up in a fluttering courtship display while singing this strange song . They are best spotted by driving slowly along the dirt roads in their territory at night, since they like to sit on roads for some reason - they flutter up in front of the lights when you get too close. For more about hummers, visit Lanny Chambers' excellent site. Write to me for more info on wingbeat analysis using Cool Edit.