P. DeBenedictis 1964 June 6 Colorado River, Parker Dam area; Calif. and the tail was closed. The bird rose about 50-60 feet into the air, climbing constantly as it gave 5-8 calls, then dropped 1st to a tall cottonwood and then to the wire from which it started. The calls were repeated at 1/2 second intervals & the calls are only slightly longer. The bird was in the air only 8 to 10 seconds. From the perch it sprang out from the cords; then went down to a small plant in a field, where it foraged at low levels, flying up 2-3 feet. It thus rose slowly up into the air, the primaries wide spread with a slow, even wingbeat. The crest & body feathers were erected, and the tail appeared to be closed. The wings were flapped constantly, and the wing beat was high, but not deep giving "butterfly" appearance - normal flight seems more like . The bird rose 20-30 feet, then dipped a little and gird a little at the end of its performance & then flew to a distant telephone wire. It was too distant to hear. Heard no other vocalization. The only display where I am certain at all the sounds made were heard was the first one I saws Snapping does not seem to be given by either displaying or perched birds. The timing of successive "songs" in the display reminds me of that of the Galapagos bird for intervals between