Remsen, J.V. 1975 Lesser Prairie Chicken Tympanuchus pallidicinctus May 3 Comanche Natl. Grassland Baca Co., Colo.: three flushed from lekking area on a hilltop in short-grass prairie which showed no signs of recent grazing. This lekking ground is the one which Lane and Holt (A Guide to Bird Finding in Denver and Northeastern Colo [?]) give directions to - s.e. of a TV tower (visible from the leN) s.e. of Campo. We heard some cackling in the distance but really only got to well see one crouching bird before it flushed. May 4 We camped at the leN and were awoken at about 0510 while it was still nearly dark to the cackling and popping sounds made by the displaying birds. The leN was situated on a hilltop (very gradual slope) from which one could see much of the surrounding prairie and from which sound probably carried a great distance. The hilltop itself had much sparser taller vegetation - mostly short green grass with scattered clumps of yucca and other brush about 18" high. Perhaps the relative bareness was due to the stomping and displaying by the birds themselves. As it got light, we were able to count 14 male visible from the car but there were probably a few other birds concealed by vegetation. A displaying male erects tufts of feathers on side of tail is fanned and corlled, neck up over top of head to make a two-pronged "headdress", leans forward lowering his head towards ground, holds wings slightly downward and outward, and struts forward deliberately with small steps. The reddish air-sacs on neck are inflated and deflated producing a popping sound. Between displays, they cackle frequently - a laughing series of 7-10 notes. With 10-15 birds displaying, there is virtually continuous sound production which must carry for a long ways. Males seemed to be about 30-60 ft. apart but there was much confrontation between individuals, involving some actual combat and flying up a footor