excited and will come down to me only after long and continued urging. Even then he may only snatch one worm and go back im- mediately to his loud song. R gives 9 coos. Rhody has extended his vocal effort so that at times he utters nine coos in succession. March 17th. Great song effort B, near the south western margin of his territory, in one or the other of the trees above referred to, fairly outdid himself this morning. He allowed Nova to bear the brunt of incubation for one stretch of 2 hours or more before relieving her. In the afternoon again he paid his respects to the Sampson thrasher, who responded vigorously, but B did not go so far to the S.W. Rhody performed as usual throughout the day. It was noted that there is sometimes a slight k on the end of some of his intermediate coos. Also a new sound, especially when he sings his loudest: a nasal, extremely high frequency termination of three or four of the intermediate coos, as if there were some very sex small, light, loose part of his mechanism that was responding sympathetically in high overtones to the vibrations of his fun- damental notes. (Like a loose part on a musical instrument). March 18th. Early songs, B and R. New distant range of R. R's increasing tolerance of strangers. R and gopher. R carries bush-tit about. B again sang loudly off to the S.W. in the morning. Rhody began his song (as yesterday) at about 7 A.M. He went over to the Covell's (next to Dr. Reynolds') this morn- ing, the first time he has been seen there, or so far away, since his first arrival. About three quarters of the way over I gave him worms in the presence of Dr. Reynolds. Rhody then discovered a gopher poking his head up from his burrow, but was only mildly interested, continuing on his journey. In about a half hour he was back here carrying the desiccated carcass of a bush-tit. (10:15) This he carried up the old oak, then to a window of the tool house,