K Dixon 1957 Parus Apr. 17 Barton Cr., 4 mi. SW Austin, 500 ft., Travis Co., Texas involved in a vocal exchange. The ♂ of the pair was in plain view and I could hear his mate in brush W his perch. I took him (#564); she called from further W then worked E, calling see out out & I was unable to locate her. The other pair retired to W across the stream & quieted down. I walked up the hill and heard [illegible] song at old house and answer to SW at 12:35,