K Dixon 1952 Parus atricapillus Feb 19. 17 mi. S Washburn, 3400 ft., Armstrong Co, Texas I proceeded in a generally southerly direction down a tributary to Palo Duro Canyon after 8:00 a.m. CLEAR, Calm. The canyon is steep-sided, carved of massive rocks, and has scattered junipers on its slopes. More junipers may be found on "benches" near the stream level. In one such area, where cottonwoods are scattered along the stream course, I heard the vet vet scold of a Titmouse and saw 2 birds in rather closely spaced junipers of east bank. They moved in close to me, then beyond up the stream before I could shift loads. I gave whistle cheer--and hissed. One bird kept up vet vet and I think it was the other which moved toward me as I hissed. I took this bird (740 ?) and started to follow its route. The latter kept well to cover and I could not locate it, looking into moving sky above shaded bank. Bird moved downstream and began peaver peaver peaver song, weakly at first, then seemingly with more confidence. It started with 3 phrases per song and then 4 and 5. The pitch seemed to me to be higher than that of this song in other Titmouse populations. This bird also gave a call see see see aahh , starting out like "fe" call It flew across stream to rock on slope to W, then occupied a succession of perches as I followed it. Bird would remain silent, then scolded as I approached. I abandoned the chase at 9:15.