Rana muscosa California: Nevada Co., Sogehem Creek July 1974 starting and 2:30 - 3:00 pm (PDT), walked ~1 1/2 mi downstream from UC field station, past 2nd beaver pond. Saw 1 R. muscosa ~ 3/4 - 1 mi downstream - it got away. July 1974 went to Box Spring in Grouse (?) Woods where muscosa has been seen. None there. Then drove to large turnout or rd to Carpenter Ridge and walked up Sogehem Ck to Segin Pond. No muscosa there. July 1974 went up to where Sogehem Ck crosses Carpenter Ridge rd. Walked upstream ~500 yds & saw 1 muscosa jump in. Went downstream ~1 - 1 1/2 mi. Got 1 ?? muscosa ~ 1/2 - 3/4 mi down. Was sitting on a log. On way back to camp (~1 hr later), he began to call. Think may be release call. Vs short (1-3 sec), guttural, trill, single pitch (which may be lower than that of R. boylei ). Rip'ted several times. California: Co., West Lake rest area on I-80 south July 1974 saw 2? muscosa on west side of lake ~ 10 am (PDT) unable to capture either.