south, j 1985 Journal 123 Sagehen Creek Field Sta., 3mi NW Hobart Hills, Nevada Co, Calif. 6300ft 10 July FW/OR's four eggs 1 2 3 4 L 19.95 19.47 19.54 18.93 w 15.52 14.41 15.08 14.73 wt 2.50g 2.0g 2.0g 2.00g remarks heavy low Russell Ln Res., 2mi NW Lafayette, Contra Costa Co, Calif 1300ft 14 July Collected FW/BK M saw no sign of mate or fledglings he is molting heavily. He is JIS 150 16 July collected OE/FW BK/2 JIS151 2031-08951A Fledgling of GE/FW but rec'd by OE/FW. 18 July Sagehen Creek Field Sta. 3mi NW Hobart Hills Nevada Co, Calif 6300ft Nest check at FW/OR 3 abandoned eggs; no singing heard M call infrequently did not see F. The Teepee had not been tampered with. Nest check at FW/OR's coffee can only had empty nest. No sign of F or young may have heard M once or twice. Nest check at BK/BK flushed 4 eggs, heard M sing. Next check at FW/OR's heard M sing, no sign of F. 19 July Egg switch between FW/OR w/BK M and FW/BK OR/RO both Fs unmated. Put nests in coffee cans with initially no mesh. This is FW/OR's 3rd nest and at least 2nd for FW/BK.