(466) 11:55. I have been working near the nest for the last half hour, during which time Brownie was in the nest. Shortly before 11:55 Greenie in the glade, where I had given him a Jerusalem cricket un- covered by my operations about 10 minutes before, began calling scrip. Brownie stirred uneasily in the nest, the scripproached, and B left for the old oak a few seconds before G took over. G had not sung while off duty, but B began immediately after reaching the old oak. This seems to correspond with what Mr. Brock says is the habit of the male while the female is incubating. My recollection, however, is that he stated that he was unaware of the male's participation in that operation. At 12:03 Brownie was singing loudly in the old oak. About 12:05 Greenie in the nest answered; full voiced: Pit-che-chee, chairk Pit-che-chee, chairk Beaver! They changeIn a minute or two Brownie came via the glass house, they met inside it and B was in the nest at 12:07. G did not sing after she left.(12:14) At 12:25 Greenie still had not sung. At that time I was replen- ishing the soft-food supply in the dish in the glade. A Bewick Wren came out cautiously and ate out of the dish about 4 inches from my hand and almost underneath me. I went to fill the bath dish with water and on my return the wren sat on the food dish 18 inches from my knee and ate its fill without visible fear. Its feet and legs are a highly polished black. 4:45. Since the last record above the birds have been incubating diligently whenever the nest was visited. Change of shift was witnessed many times and the nest has not been seen uncovered for more than a few seconds at a time since the first change was noted. Greenie has been rather silent. Brownie has sung once or twice loud- ly and once a long half-song in the glade of very good quality.