call for food. Strange it could not be heard in the nest. At their last feeding they were given cut-up meal-worms. C is now able to get up on the lowest perch. During the rest of the day they were fed at regular intervals, in small quantities; preened often and dozed much. Both of them like to lie quietly in the hand and will stay as long as permitted, showing no tendency to leave, dozing and occasionally making comfortable little sounds, especially after being fed. They rarely call for food. Rhody was over at the Nichols' about 5 P.M. and would not respond to call; but when I turned and walked away, apparently thought better of it, ran to the fence flew over, and followed to the tool- house. This mouse, with ceremony, was taken to nest 8-37 and eaten there promptly. He then took a long rest and, at 6:15, was seen by Julio heading for the cage--away from his roosting place. May 22nd. The young thrashers were fed at 7 A.M. They seem in first class condition and are void of fear. Rhody was in his nest 8-37 at 9 A.M., crying on being spoken to, but not coming down. A little later he was carrying up twigs. He remained at this occupation until after 10:30 and at 11 was on the observatory roof. At 12:10 I had the young thrashers beside me in the upper garden in their cage, giving them access to the direct rays of the sun instead of light transmitted through glass and thus deprived of most of its ultraviolet wave lengths. Chiisai suddenly squalled, calling my attention to Rhody 5 feet away intent upon the cage and its occupants. Each time Rhody moved nearer C squalled, but Okii was indifferent. R now came so close to the cage that he could have touched it with his bill, so I held a hand between him and the thrashers. He was intensely interested, but did not offer to peck them. His attention was drawn from the birds by a mouse, but, after a good drink, he went up to the roof. In 15 minutes or so he was back again. Previous action was repeated in all details except that a smaller mouse was substituted. Even the drink was repeated and the ascent to the roof. Chiisai now squalled at any large object in motion nearby, but would lie quietly in my hand, squalling however, if anything ap- proached or if I moved one hand too quickly. (A new phase in his behavior). Both youngsters performed thrasher standard "sun-fits" and Okii developed a sweet little warbling song of short duration, but repeated several times. (Similar precocity was noted with some of Brownie's chicks). I was absent from about 2 P.M. to 4:30. Julio said Rhody had again been "snooping" around in the upper garden in the patio and also "wanted to get into the dining room". He was given a mouse. At 5 P.M. I looked for Rhody, could not find him, but as I was standing in the upper garden wondering where next to look, a fluff, fluff, fluff, fluff over my head, and Rhody landed in front of me, hav- ing sailed down from a tree behind me and just cleared my hat. He wanted food at once, so I tossed him a few worms and then went to the tool house over a route along which R has never followed me. I could not see him coming, but in a few seconds he was waiting for his mouse. He refused a large one but accepted a tiny one with full ceremony and carried it off along the north road, pre- sumably either to nest 8-37 or else to the roost tree. As a route