that time until about 11:50, I should say his time was about equally divided amongst full song, sitting in his night roost, foraging for food and sub-song. Nova was frequently with him and all the family placed. Peculiar thrash-At about 11:50 I was attracted by peculiar thrasher music, con- fused in character, coming from the s-h tree. I went there and sat down. Brownie and Nova were both singing at the same time, but differ- ent "tunes". Brownie's song contained few of the phrases character- istic of his music. Nova's song was not at all that easily recog- nized as thrasher-produced and, at the same time, entirely different from B's. Nova's was higher pitched, as a rule than B's, less flowing and harsher. Both were more staccato than commonly heard. Whenever a pause came, Nova sometimes continued alone for a few seconds. B always lead off, N promptly joining every time without fail (I think). They were sitting apart and there was no sign of courting. After about 10 minutes B moved to the adjoining tree, Nova remained where she was, but the dust continued with pauses of only a matter of seconds until 1:45. At that time, after having lunch at a point where I could observe the continuity of the performance, out of sight but not out of hearing, I went to see what would develop from the affair; but on the way to the tree I met B chasing Bb (who had been attracted by the song about 40 minutes before, and who had been quietly digging about under- neath it all this time). It seemed to be a real chase as Bb was complaining and B seemed to have blood in his eye. As they went by me I spoke sharply to B and he stopped in his tracks and faced me. Naturally it was the prospect of food that halted him, but when I up- braided him for his heartlessness, he had a curious air of listening and although he resumed the chase (Bb had stopped too) I stopped him each time and he finally abandoned it and went off, allowing Bb to come to me for worms. I am inclined to think that the duet was a manifestation of court-