1528 Oct.16th. Although no thrasher song was heard during the day, we are undoubtedly now in the thrasher "Convention Period". Owing to my two week's absence I can not say which end of it we are in. No sign of O and C during the day. Oct. 17th. From about 6 A.M. until 9 there was much thrasher song in all directions, culminating in a fine performance by Brokenwing and mate in full view about 50 feet from me in a Catalina ironwood by the oval lawn. The principal part was taken by BW, the mate's being completely dominated by it. I watched and listened to these two bird for about three quarters of an hour, during which time BW sang almost continuously, not even shifting his (?) perch. The mate frequently left the tree only to return again and sit a yard or two from BW. It was seen that this bird has a much longer and more sharply curved bill than BW. When they left I followed to the Scamell house, where BW con- tinued to sign from the top of a deodar for a few minutes longer, a softer and less staccato song, then sailed down to the south west into the canyon. By this time all thrashers, of which there had been two or three more heard singing from distant points, had c ceased, and for the rest of the day only a few random calls were heard, although BW and mate were again here. As to the quality of BW's song compared with Brownie's, perhaps fair judgment can not be rendered at this time, since this is the period of "hysterical" song when quality is not at its highest, and moreover, the two birds have not been heard under all conditions which influence their song. At present the impression is that BW is less melodious and versatile than B. Oct. 18th. Widespread, early thrasher singing, ceasing abruptly about 8 A.M. About 8 A.M. Julio saw Chiisai at the glass house in the dor- mitory tree, identifying him by the band on his left leg. J went to get him worms, but C had left when he returned. At 8:30 I found Rhody occupying his post on the west lot and tossed him worms which he caught expertly. This is perhaps the beginning of a period of reoccupancy of this favored spot. (J.e., jaunted at this season). At 9, while sitting at the oval lawn, I saw BW and mate approach- ing from a hundred feet away along the ground. They came and ate from the feeding station 15 feet from me, remaining in the immediate vicinity 15 minutes, then drifting off to forage amongst the shrubbery. BW took the lead in all things, followed closely by Longbill, easily identifiable by his beak. Undoubtedly they are mates and, I think, BW is the male. Thus it looks as if O and C are being replaced by their parents. They "talked" to eachother in fluting tones audible perhaps 20 feet, like Brownie and Greening, and their relations were those of adult birds. Chiisai pays brief visit.