K Dixon 1951 Parus atricristatus 3. Feb.25 Juniper Flat, 5600 ft., Chisos Mts., Brewster Co., Texas overcast; wind gently, intermittent, chiefly from E. I left the store - cottage area of the basin about 9:25 and walked up the trail in a leisurely fashion reaching the flat about 10:00. I walked around over a level area for a few minutes and encountered a titmouse at 10:10. The bird was foraging on the branches of a juniper near the trunk; it gave call note "sip" or "seep" intermittently. A second bird was present and stayed close to the first, while a third titmouse gave sip notes to the south a few feet. When one titmouse flew out onto the branch where another was foraging I heard a note somewhat of melodious quality, similar to what I called a "sub song" in P. inornatus; this seemed to be a note used in aggressive behavior. Two of the titmice stayed together, each answering the seep notes of the other. They moved through 18 consecutive junipers, although a few pines and oaks were in the area. The third bird moved along with them and seemed to be associated definitely with the other two; however I never saw three together in one tree. As I followed the three I recorded the following calls seep (= location note) used most commonly, uttered by birds when others not in immediate vicinity see see seep chuh dit chuh dit heard once ---_-_- see - deh and see deh deh somewhat nuthatch-like high nasal quality possibly contact for birds separated by several yards sveh dit sveh dit sveh deh deh det deh-det deh-det stacatto, once