Remsen, J.V. 1974 Whip-poor-will Caprimulgus vociferus June 15 James San Jacinto Mountain Reserve, Riverside Co. Calif : I began calling after dusk and came in close when we played the tape to him. I saw it three times fluttering through the air overhead, but only the silhouette could be distinguished. It would come no closer than 100 feet despite seeming very agitated by the tape - almost continuous vigorous calling. Finally departed after about 10 minutes of dueling with the tape.