and over the fence for his mouse. At 1:30 P.M. this performance was repeated exactly--even to the wrentits. Thereafter R went to his post on the edge of the lot. Rhody remained on the west lt all day, not once coming to the cage. He had ceased all activities associated with the renewal of his breeding cycle. It should have been noted that, during all of his activities yesterday he did not sing once. February 7th. 9:30 A.M. (Bright and clear since sunrise). Rhody at this moment is singing from the roof of the observatory. This is the first instance, in the present cycle, of his having gone to an elevated point to sing; showing increasing intensity of his mating instinct. He went up there about 9 A.M., having been heard first at about 8:45, apparently headed in that direction. For the first quarter of an hour he did not coo at all, but uttered a resonant series of rattle-boos instead. I went out at that stage of his activities to note effect upon R5, finding him keenly aware of R's presence and, apparently, ex- act location, as evidenced by the direction of his gaze and locatin in the cage. It is possible that he could catch a glimpse of him through the foliage, but not certain. When R gave his first coo-song from the tower, R5 reacted at once, dropping to the ground and running to the perch nearest to R, where he listened keenly, with crest raised and colors display- ed. 9:45, R still up there. 9:48. He is at the cage offering a twig to R5, through the wire. Both are bowing with sidewise tail-waggings. Courting Activities of Rhody from 11:53 to 10:37. This entry, written at 10:43, covers activities of Rhody during the above period. The times above are accurate; but all interme- diate records of times and intervals are subject to considerable er- ror, since the action was so rapid I did not have time to make a note of them. At 9:53 I found Rhody sitting quietly about 20 feet from the cage, R5 inside at nearest point to R. R was now interested in me and followed to the tool-house for a mouse, first going to the window to watch me catch it. This time he did not wait there until he saw me start for the door of the tool-house, but anticipated my movement, and was there first. He took the mouse, with full ritual, and then, as I had hoped, started at once for the cage, where R5 was waiting in the outer portion. (This bird is now so accustomed to my doings that he tol- erates my goings and comings without much concern; For example: I can now go in and out of the outer cage when he is in it without casing him to depart, and he behaves naturally while I am near him. This makes it easy to watch action between R and him). I beat Rhody to the cage and stood outside near R5. R came to the wire not over 3 feet from me, bowed, hrooded, tail-wagged for R5. He was much in earnest about it, with raised crest fully spread, so that I could look down at him and see the bare skin at the base of the feathers; skin patch drawn taught and all colors vivid. He wanted R5 to have that mouse! He even pressed it against