Apr. 17 Barton Creek at 10:25. One bird ascended me from the NE corner of this Clearing, then flew SW into elm-Spanish oak grove. The underbrush was thick and I was unable to stalk the pair successfully. I saw the ♂ foraging, then flying to where the ♀ chattered and I assumed that this was feeding of the ♀ during an inattentive period. I was reminded by this case that I have not heard a ♂ of a pair sing during such inattentive periods in contrast to the song of ♂ P. inornatus , which I interpreted as an attempt to direct the ♀ back to her incubation duties. I walked across through brush & woods a few yards to the rocky dry Streambed. Subsequently on the opposite side I heard song of a bird which appeared to be alone. It sang for several minutes from oaks on the E bank, then flew W to willows(?) on W bank. It moved inland 30 or 40 yds and I wasn't able to stalk it. Bird flew back E quickly & then changed song with ♂ further W (⊗ of pair had seem ⏺ 10:25 - ?) After 11:30 I worked downste am to the bend where the creek flows E (point where path from top of hill reaches creek). I heard brief periods of song from both sides of the creek but wasn't able to track down the singers. At 12:10 ♂ sang from point indicated on chart Fence= x = ① then moved E among junipers along path indicated by double ② line. At 12:20 Two pairs were