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58 Tangara, Mar. 29, 1961, II [[left margin]] [[3 gray vertical lines & 1 grey cross-hatched vertical line from top to bottom]] [[/left margin]] have not done any building at all this morning. Is this because the nest is completed? Or because we had a lot of rain yesterday? Interestingly enough, when all 6 birds of the flock are together in the A nest tree, they all combine to drive away intruders of other species. They all fly to the intruder with CN Trlls and/or unusually hard & sharp CN Trlls. This usually induces the intruders to move on. If the intruder does not move on, immediately, all the Plain-coloreds may perch around it, silently, for a few seconds, before flying at it again with more CN Trll's and or hard & sharp CN Trll's. During such periods of silent perching near the intruder, one or more of the Plain-coloreds may assume a General Fluff Posture like the ones I have seen before. Obviously very high intensity in spite of its silence. One bird in a General Fluff this morning looked intently down at its perch, and then BW'd, rather slowly. [[image - side-view sketch of bird with comments]] Looking down at perch in General Fluff Posture I have frequently seen Plain-coloreds perform BW's, usually rather rapidly, without General Fluff, in a wide variety of circumstances, whenever 2 or more birds were together. I suppose that some of these BW's may have been "displacement". I have never, however, seen Plain-coloreds raise and stretch their wings, like Palm Tanagers, in circumstances and in such a way [[end]]
