1376 gazed down at us dispassionately for a time, then rattle-bood once and began to "cry". It was impossible to tell whether he whined for Rhody or for me. It may be that this was really the first time that I have seen a road-runner address this call to another one. I now gave Rhody the mouse outside at the open door, but he carried down to the sage away from the cage, returning later to present it at the mirror and other places while R5 still remained aloft. With R out of sight R5 would whine when I went into the cage. After a half hour R took the mouse to nest 2-36. When he saw me approaching, he whined, then started work on the nest. He had eaten the mouse. I stayed there 5 or 10 minutes and he kept up his whining; but I developed a new pattern, which was to whine (cry) and then follow it with soft beak-rattlings (mutterings). So his "conversation" during this period, for the first time, consisted of a succession of whines and rattles--reason for the change unknown. I left him there at 11:30. On entering the cage again, R5 greeted me with whines and came down from his resting place. At 12:30 I went out for a few minutes to note any happenings. When I entered the cage R5 came down in friendly manner and loafed around. Rhody was glimpsed for a few seconds running swiftly by the cage to the south-east, bill, neck, back and tail all in line, low to the ground, flowing over the irregular surface and adapting himself to the changing contour as flexibly as a lizard. In a few moments he was back again, dropping a twig at the foot of the mirror without display or sound, then off to the north fence to run back and forth along it in circus display. I now "borrowed" R5's mouse and showed it to R through the wire. He came for it meekly and as he was about to reach for it, changed his mind and began to work on the feathers underneath his wings with the mouse clinging to the wire a foot from his breast. He now wandered off and I left. At 1:20 I passed by the cage (just in time to see R5 gobbling his mouse), over the fence to nest 2-36, on to the east, then south outside this property and up the driveway, without seeing Rhody, until he came running from the north-east (where I had just been) toward the glade where he rattle-bood twice. I now went to the tool-house. R accepted the hint and followed. I gave him a very large white mouse which he accepted and downed without overtaxing himself, without ritual of any kind. He will probably now loaf for the rest of the day. Still nobody knows the sex of R5! (Not even Rhody?) 4:15 P.M. Rhody is in the ceanothus where he stayed so long on the tenth. I looked for him there at 3:40, but did not see him, so went down to his roost tree and climbed the bank to make certain he was not there. Then retraced my steps. The wrentits were now scolding at the ceanothus (on the bank above the fig tree). I looked up into it carefully. All I could see was quail on the ground below the wrentits. I decided that the quail were the cause of the scolding, but, to make certain, now went up to the driveway where I could look down into the shrub. In a few moments, there was Rhody preening not three feet from where he sat so long on the tenth, with at least 95% of his form in perfectly plain sight. If he should ever really try to conceal himself, he would be perfectly invisible! (Cloudy, mild). 4:30. He is still there. This time I saw him when 50 feet away, before I really looked for him. At 4:35 he was down from his perch, apparently headed for his roost along the accustomed route, but