KDixon 1949 6. Parus wollwekeri April 29 8mi. S Whiteriver, 6100 ft., Navajo Co., Arizona At 7:50 I ran onto a pair of Plain Titmice on this same E-facing slope (no vegetation real) in what I took tobe the adjacent territory to the north. This pair did not appear to be nesting and I saw what I took to be a sexual chase. At 8:45 I heard song of Bridled N W-facing slope opposite point where Bridlot had sung at 6:47. This B sang contin- uously from 8:47 until 9:09. He was apparently alone as I followed and watched him during this time. Once I saw him kick at a drying oak leaf. After 9:09, I heard a grating, finger-like call dub dub dub dub dick duft which I thought was from the F but at 9:15 the bird gave pet pet song then resumed call. Bird also gave soft tuist uit and a "fear call" see see see when I moved. Then a more grating gra aa at (nasal) The bird sang again in this same oak (since 9:09) and flew downslope at 9:20.5. He worked N along lower edge of the woodland bordering on grassland. I lost him at an (outpost?) junct at 9:24 but later heard him sing farther to the south. Was this continuous singing an indication of an unmated bird? Wind since 8:00 has been strong from S (up to ±12 mph). Is it possible that this is the bird which sang from the West side? Up slope to west again and N of Plain Titmouse territory Pet pet song 9:40 - 9:46; then bird flew upslope. Another to alone apparently (Bird had given a fear call in the middle of his song when a Sparrow Hawk passed close