1514 R's moult. Rhody is still losing soft feathers when he preens. Sept. 3rd. Chiisai sings quarter song. The principal development of the day up until now (11:30 A.M.) has been Chiisai's fine quarter-song, sung while sitting on a limb, not sleepy and not, of course, digging. This is a performance not yet heard from Okii; but the latter has sung a few bars of full-song; though rarely. Rhody has one of his circuses occasion pulled off an elaborate circus around the cage and through the bushes. Whom it was intended to impress I do not know, al- though twice he came and stood in front of me for a few moments as if to observe my reactions. He was not hungry, as he had just been given a mouse and refused to be interested in a second when put to the test. Okii lame. Okii has gone lame in one foot; not the banded one. This happened frequently with Brownie. No sign of external injury is to be seen. Sept.4th. Chiisai again is the the singer. Nest reaction. About 10 A.M. I heard a fine, low, continuous song from the thrasher cage while I was about 25 yards away. It proved to be Chiisai again. He stopped when I arrived at the cage, picked up a long slender root, tried two places in the outer cage, then carried it to the "regular" nesting place, where there is still no material progress to be seen. About 11 A.M. Rhody, taking meat from the dish, would not drop it and follow me for a mouse. A little later he produced another one of his circuses. At 2:45 I approached the cage and, at about 100 feet distance, I could hear the phrase: Sung an octave higher than written. (This is the way it sounded to me, but I positively do not guaran- tee either the pitch of the notes or the technical correctness of the transcription!). This proved to be from Chiisai, sitting on the back of a chair, and was only the loudest phrase of a continuous song, as I discovered on nearer approach. Okii was singing digging-song in the inner cage. C, on seeing me, ran to the wire and began to yip like a baby bird, adding his little tsee poo, which often accompa- nies the yip. (It is curious that both birds should still use this yip when requiring attention from me. To the best of my recol- lection none of the other youngsters used this after the first week or so from the nest, and Brownie never used it).