N. D. 1952 Parus bicolor - atricristatus Feb 13. 3 mi. ESE Del Valle, 300 ft., Travis Co, Texas - SUNNY and CLEAR after rain of something over 1 inch during night. CALM until about 7:30. We worked on Mr. Smart's ranch, driving S and then W of barn and corral into an extensive area of mesquite brush. Dr. Miller worked downslope into elm-juniper of tributaries drawing N into Brian Creek upstream from the bottomland I worked Feb 11. I went S and E into a dense woodland of somewhat scrubby postoak-blackjack-juniper-elm. I heard no towice in immediate vicinity and worked E to where trees ranged to 15-18 ft in height. Here, at the W border of the pasture lying W of entry road, I heard a towmouse. I worked carefully through tree and whistled in answer to the 5-phase song. The bird moved toward me and paused +/- 15 ft away, silent. I took the bird after a pause, fairly sure from having followed it that the bird was alone. It was a typical atricristatus- type ? (724) which had been singing steadily (5-7 phases). I went N along narrow grove of timber W of pasture. No song and no response to my whistle until I was about 50 yds N of barn. In this area I encountered a singing bird where I have seen 3 towmice together on Feb 11. The bird sang steadily peer - - (3 to 5 phrases) answered by one E of Smart's house and one in woods cross pasture to E (4th member had been ?724). I whistled and bird answered. I waited and listened and saw a towmouse chase a Carolina chickadee. I watched the towmouse which seemed to be alone and