a much more difficult accomplishment than one would suppose, and took the rest of him for granted. Nova was on the nest and began to rustle the instant I turned the light on her, so I beat a hasty retreat. Evidently, therefore, Brownie knows what he is doing and his con- fidence in his partner is not misplaced. to Pat (to restore Little Brownie his original name, to which he has now sole title) now 2½ months old, is a fine, strapping youngster, looking fully adult, though with Greenie's eye color. He is full of pep and friendly. Dr. Reynolds reports that he had a visitor yester- day; another thrasher outside the aviary and they were much interested in each other. June 28th. 9 A.M. I have tried repeatedly to get a picture of the young birds in the nest, but Brownie comes and gets on it before I can get every- things adjusted. If he is not there as I approach, Nova sees me from some point of vantage nearby and notifies Brownie. He is friendly enough about it, but persistent. 9:10 A.M. This time I beat the Nova-Brownie combination by about 10 seconds and got a chance at the youngsters. (Dis. 28, stop f,2.8, deep shade, footage 4½ feet). June 28th. to July 4th. at 11 A.M. During this period I was absent on the Condor trip. Julio informed me that the young thrashers left the nest on the morning of the 29th. and that each adult was attending to but one bird. I had an engagement for the day, but looked up B, finding that "his" youngster was in the dormitory tree. I heard Nova, but had no time to look her up and locate the other young bird. July 5th. Brownie is feeding only one of the young and Nova the other, the latter being discovered soon after looking for him. Both are very