Greenie climbed the old oak and sang full song exactly like Brownie in every respect. I am satisfied that only detailed analysis of an actual graphic record from a sound recording apparatus could show any difference in quality. Even the phrase berra-che-cup, a new one just used by Brownie, also appeared in Greenie's song. There was no confusion of the two birds with each other. It will be noted that this behavior of an egg-laying female does not fit in with the ordi- narily accepted pattern for these birds. G well wound up. While B was still in the nest, G came back into the same tree oak and again sang full-song, then returned to the old and scripted. 8:25. B in nest called purrty 3 times. 8:27 G entered nest saying berra-cè-cup softly. 8:27½ G came out 8:28½ I went up on platform near nest. 8:29 B came back into nest. 8:29½ G again singing full-song in old oak, B in nest answering softly. 8:30½ After short silent interval, G resumes song with same motive. (Another thrasher is singing far off to the N.W.) 8:33 G dives out of tree. 8:35 I comes to me in glade--I had expected G. 8:37 I go to nest, G is there. 8:38 G leaves nest as B calls from old oak. 8:38½ I hear both in old oak as I stand at nest. 2 eggs still. 8:39 B enters nest and answer G in the old oak.. 8:40 A quiet period for 5 minutes and I leave, noting B preening in the old oak and G in the nest at 8:45. The times are as noted by watch. Probably there is no error of more than a half minute. Where half minutes are recorded, error is not more than ¼ min. 10:00 I am just going out to observe again. There has been frequent singing in the mean time. 11:55.At 10:05. Greenie in the nest. I try to feel under her, but she sits like a rock and is frightened, so I decide to wait for the change of shift, and it was a good long one. There was not a sign of Brownie until 11:45. At that time I saw him approaching the nest from under a small pine. G spotted him almost at the same time and called loudly from the nest: