Feb-3 15 mi. W Bastrop, 600 ft., Bastrop Co., Texas and once heard sit sit sit given by bird flying in retreat across open 40 ft or so to NE. During this action I heard song purty purty purty purty mostly 5 phrases per song and kayta - - - - 5 and mostly 6 phrases. No song I could attribute to participants. I am not sure that were not more than 4 birds involved in fighting; all birds may not be paired yet. This action ceased by about 11:00 and no further calls heard although I spent 30 minutes in area, seated writing notes. There was no singing in answer to the songs of the bird which had started singing to NW of the garrel. I left the area at 11:35 and worked N toward road. I heard no titmouse in any of the mesquite or mixed mesquite-elm areas away from the stream. I left camp at 1:00 pm, working areas S of road to same elm patch along brook course, returning at 2:20. About 1:20 I heard song from area NW of earth dam - no answer. There was another titmouse in same area with Carolina Chickadee, Golden-crowned Kinglet (2). I did not encounter titmouse at any other time during the afternoon.