(429) "The" fly. "The" fly was on top of her head. She was in no hurry to leave, but preened, scratched and ate worms, perfectly at ease while sitting there. G's quick lunch. A few minutes after she left Greenie came charging in on foot from some unknow place, went directly to the soft-food dish, gulped a few mouthfuls and bolted, without looking at me, as if he had to catch a train. Nest building. When I left the glade both birds were picking up nesting mater- ial in the berry-patch. Greenie dropped his, but B. carried hers to the nest. She came down and got a large twig and after a hard tustle getting it through most of the numerous obstructing branches and twigs, finally lost it when it caught and fell to the ground. She replaced ^ with one which she found loose in the tree, but this also got entangled and fell. This was enough for the present and she left. G inspects lath house. Greenie, during this performance, was inspecting the interior of the lath house and trying to find some way out other than the door by which he had entered. This he accomplished by discovering the only other possible exit--an opening left by a missing lath which I had knocked off by driving a golf ball through it, having achieved a hook after having allowed for a slice. Real nest not expected. The nest-building urge is certainly acting strongly in these birds, but, as in the present incident, in the off season, it quickly appears to lose its force when encountering some minor obstacle. notwithstanding that B&G have been seen recently in courting behavior. I still do not think that this is a serious effort. I have seen no evidence here of other birds acting in this manner. Little progress. Progress at the nest is insignificant. B's breast now lighter Since the moult Brownie's breast is distinctly lighter in shade than Greenie's. 6:00 P.M. The temperature has dropped from 80 at noon to 62 now, due to a fairly strong breeze from the north. Neither thrasher was in its night perch at 5:50, although I had just fed them both and each