K Dixon 1951 26. Parus atricristatus Mch 2 Santa Ana Wildlife Refuge 7 mi. S Alamo, Hidalgo Co., Tex. The two birds worked S toward Telephone side & at 5:47 both were perched there. One then took a prominent perch and called sivivetvet continuing vet vet notes as though scolding & moving to a perch a couple of feet closer to me! (I stood N W tent) Thinking that I might be disturbing them I went inside the tent as twixie flew into large ebony N of house, Sun still shining. Mch 3. Foggy or low clouds, little wind. At 7:05 call seesevevet from Ebony N of "bend" in house. Bird continued vet vet for a minute or so, then sit out. At 7:12, entrance to the S sang "pea-pea pea-pea" two notes not hurried, a clear liquid whistle. Bird in ebony answered at least twice. Traying continued with sit notes. At 7:17 bird I was watching sang "hear hear hear" each note an exact repetition of the preceding (this may have been in response to sit sit from Tree "B") for or faced in that direction when he repeated song. Answer in kind from pin to W and pair to S. Silence again; at 7:20 I saw both twixie in ebony where all activity of morning has prevailed - probably both there all the while I have watched. (For last 10 minutes or so a Golden-backed Woodpecker has hammered away in that same ebony tree. Myrtle Warbler and Bluecatcatcher also there, Orange-crowned Warbler. See such dit such dit over & over from same tree at 7:33 Calls continued rather steadily until 7:40 when one bird in tree SW "C" flew N into "C"