Apr. 15 7 mi E DeValle, Travis Co., Texas - At 10:35 I started S across the road into the mesquite-elm from which I had heard songs. I reached a dam built for a "tank" which had a little water in it at 10:45, and walked W where I could hear two finches exchanging songs. I saw one titmouse on W side of a pipeline, black forehead gray chest and another to W with white forehead and gray chest. Former sang from elms there then flew E to mesquite & sang from there. Bird in elm-mesquite now did not sing in response & I thought it was a ? It had food in beak & I shot at it with [illegible] - It flew to several perches in succession, circling west, then S. It called sivut wit several times, then to my surprise burst into song kiva - - - - (pata ->) first from elm S of W stump, then to E Song commenced 11:03 continuing - at 11:09 answer from NE Song changed to pata pata pata at 11:10 occasional song from SW too. At 11:21 tury - - - - - very rapid - same song from NE once, then intermittently for several minutes. Song interrupted at 11:24 then kiva kiva - - answered by tree - - - NE Bird I was watching was on twig of leafless elm where it had been at 11:02. Song exchange still going on as I moved N at 11:32. I walked along a brook course for what seemed to me to be 75 yards before sighting the road. At 11:38 a titmouse (bicolor) flew S across the road from next area. Probably (then) were engaged in song to S.