(448) Full song. At 4:40 nobirds at the nest, but one singing loudly from the old oak, using a great variety of phrases, few of which I either recognized or can approximate. It probably was Brownie, for it was she that cam?when I entered the glade. Greenie did not appear at this time. B took two almost invisible fibres to the nest, passing through the house en route. When I left a few minutes afterwards B sitting she was sitting in the nest quietly. A day of singing. The birds have sung frequently today, much more than usual. It has all been full-song. Hole in nest closed. The hole in the bottom of the nest has been closed, but the sky can be seen through interstices in the structure at many points. Singing not affected by weather. (Temp. 56) It has been a chilly, overcast day, but with little wind. This has not affected singing adversely, it appears. Brownie missing 6:15. At exactly 5:50 Brownie, who had been taking worms from me under the nest-tree, went up to the nest by the old route. In without embarrassment order to give her time to chose her location, now that she has the option of the house, I went to look up Greenie, finding him comfort- ably settled. I returned to see what had been Brownie's final choice, and for 15 minutes searched the tree in detail with a flash-light , giving practically all of that time to the house, her accustomed roost and the nest. I had practically given up three or four times, when I saw the end of her tail projecting from the nest. Now, I wonder what this means. No use theorizing; but this is the first night of occupancy. The amount of singing was unusual today. I have not considered the nest as completed. Brownie had one shift in it of long duration today, as noted, and thrashers begin incubation with the first egg. That is about all I can think of bearing upon the phenomenon. I wish she had roosted in the house. October 9th. 8:00 A.M. At 7:45 I noted that there were no thrashers at the