R repeats work- bluff. R moulting. New feathers. Takes twig to glass house, then to mirror. Brownie singing "hold" Nova. Youngsters follow B to me-- an inference. Chicks differ. Brownie dis- criminates against N's chick. Rhody still-hunts liz- ard. I found him still in his nest about 11, having probably been there ever since. He whined and made a few perfumctory efforts to arrange things inside when he saw me. In a few minutes he was preening on top of the cage, soft feathers floating away. I went and stood almost directly below him--near enough so that I could easily have touched him. In addition to the feathers, it was noted that he was also removing flakes of the sheathes which enclose new feathers, so presumably new feathers are coming in. After this he retired to rest on the ground in partial shade until about 11:40, when he began to look about for something interesting. This proved to be a short, thick twig which hap- pened to be lying in his path. This he took up into the glass house, looked for a place to put it, decided against action there, came down, trotted past my feet directly to the mirror, where he pressed it for an instant against the glass, as if reporting to some tally-man or time-keeper, thence to nest 2-36. For the last week or so Brownie has sung more--not long songs-- but short snatches of full song, the apparent object being to "hold" Nova. This morning both young birds, for the first time, followed him to me, suggesting that Nova is relaxing her care of her special charge, possibly in anticipation of egg laying in the new nest. It was quite evident that "her" chick is smaller and weaker than B's and not in such good condition, the difference perhaps being due to B's frequent use of me as a food provider. Brownie very clearly discriminated against the smaller bird in feeding--though he did feed it--even to the extent of passing by it with worms for the larger one, who had already been stuffed and had retreated 50 feet or so into the bushes and needed no more food. (See later) At 1:58, Rhody, prospecting about in the upper part of the inner cage, spotted a lizard summing itself on a rock forming a part of my Upper Sonoran "scenery" in the 12" x 12" new extension. He im- mediately ran to the rock and, the lizard having disappeared, he crouched low ready for action, absolutely unmoving, staring at the spot where the lizard disappeared. (This lizard took to my scenery several days ago, and hides under a certain rock). 2:05. First movement by Rhody, and then only his head (to snap at a yellow-jacket that buzzed by him), 2:08. Too hot on the rock, so has to open his bill and puff. No other movement. 2:11 He suddenly strikes at something through a chamise bush (Adenostoma fasciculatum), misses and very cautiously peeks behind and under the rock until: 2:13, when he gives up, goes to look at the magpies, gets meat and at: 2:15, comes out of cage to cool off in the breeze that blows over the ridge after prolonged bill-wiping characteristic of these birds after eating anything moist or sticky. I went into the cage. 2:20. R comes in again, goes directly to same rock and resumes tense vigil. He looks very green. The mouse had not shown up again, so Rhody remembered the right spot pre- cisely for at least 9 minutes. (Intelligence). 2:26. To inner cage after a dash at the magpies. 2:27 Drinks long. (To 2:28 1/4). 2:29 Back for lizard again, making slow search. 2:31 Goes to inner cage to get shade. 2:40 Comes out rapidly carrying a twig and makes the fastest time I have yet seen him make on the way to nest 2-36. Makes quick time to 2-36.