2.6 mi. SE Tondal March 27 Hunted in dense acacia and thorn-tree near place where we took humilis March 24. Heard one call of a small cactus wren. Two groups of cliospensis located, both around the few larger trees in the area. T. pleurostictus seen in a low tangle of vegetation, and I observed a wren Dan quite certain was T. modestus in the same tangle. The nest in the acacia by the tree in which we took humilis March 24 is a nest of the social flycatcher I believe. Found a pair of humilis-like birds along a road leading from the new highway. They were foraging through a row of small trees along a fence along the road. In an acacia nearby are two large cactus wren nests. (See photo 4-4). Call notes heard: "cha-chit" - very fast and nasal, qua, qua-qua notes about same as those sky before yesterday) pitchel, there). Songs given by one bird: tilling chetter then who-tweet, who-tweet, who-tweet, who-tweet - given rather fast. Lengthy song. On another occasion the song was more like "ha-tweet, a-tweet, a-tweet, a-tweet. one other time given as follows: trile MMM - a-tweet, a-tweet, a-tweet, a-melt, a-tweet.