Works a little in nest 2-36. Suddenly vanished Cannot be found. Appears to have retained definite recollection of this nest. R finds me. Follows me. Boos. Shows indecision. Performs mouse- rutual. Rhody offers mouse to R5 with full honors! Much in earnest. Offers mouse to mirror. Back to R5. Eats mouse. R5 whines to me for first time. Rhody goes to nest 4-36. went to the tree and stood near the nest. Rhody was standing on the rim examining it. He now shifted a few twigs and sat in it. In 5 minutes he came down and stood in plain sight in the open, 15 feet from me. I looked at my watch:11:05. On looking up R had disappeared utterly, without sound and without my having had any sense of a moving object anywhere. Except for a few widely scattered bushes, the ground is open in this vicinity. Nothing could be seen during a search of 5 minutes. I climbed back over the fence and continued the search, looking at each of the old ests. I widened the scope of the search, principally to the north and north east. I revisited all places previously examined. After 25 minutes I discovered no trace of him. R5 had also lost interest Here we have an example of a road-runner showing interest in one of his old nests at the beginning of a new nesting season. From the directness of his action and precision of his movements, it would appear that he retained a definite recollection of the existence of this nest and its exact location, and acted with purpose. His sudden disappearance again illustrates the perfection with which he blends into his surroundings. At 1:40 I was preparing to burn a pile of trimmings in the Clearing when there was a soft frou-frou and Rhody suddenly appeared on top of the fence. I invited him to follow to the tool-house for a mouse, which he did enthusiastically, keeping abreast of me most of the time in the shrubbery. For some reason he has lately done this instead of following in the open road. He stopped to rattl-g-boo twice en route--why, I do not know. When we came to the point where he had to make his decision between the open door of the tool house and the open gate of the shop-yard, he chose the latter first, then the former; and when I was getting the mouse, alternated between the two, first looking in at me through the door then through the window which opens into the yard. Again he tapped on the window when I held the mouse near it, but quickly came to the door when I moved in that direction. I had momentarily forgotten about his mouse-ritual and was somewhat surprised to see him perform it and head at once for the cage in no uncertain manner. R5 was outside in the outer cage and Rhody went to him at once (as close as he could get) bowed profoundly, hrooed and wagged his tail sidewise offering the mouse. This is the full mouse-courting gesture used with Circe and once with Terry when released. He repeated this many times, moving about to keep close to R5, who seemed perplexed as to what it all meant. There can be little doubt that this was a definite, clean-cut attempt to establish close relations of some kind with R5. (Now what is R5?) This kept up for several minutes, interrupted once by R's going to the mirror and presenting the mouse there with full ritual. (The first this season). Now back again to R5 who was much interested, but still uncertain what it was all about. Rhody now determined that his behavior produced no satisfactory results, so went to the east side of the cage (where R5 could not see him) and ate the mouse. I now turned my attention to R5 more closely. He was in the sleeping place made for A and T (shown on P.1042). When I spoke to him he (for the first time) lowered his head and gave the pleading whine of R, A and T. I talked to him and he repeated it many times. Rhody had now disappeared, but was found behind the cage. He came out directly to me and stood beside me for a few moments, then headed for the "Dormitory Tree" where he had started Nest 4-36 in the glass house last year. He went directly up into the