At 8:30 A.M. Brownie, after sitting on my knee eating worms, made off to the south east, running and flying towards Reynolds territory. A half hour afterwards I went over there and saw him (I think) in the lot next door amongst the wild growth. He would not come to me. The thrashers are incubating regularly (beginning with the first egg as usual). There are at least two eggs; possibly three. The Road-runner has turned his attention to them, and at about 4 P.M. was observed following Brownie to the nest. As he seemed de- termined to press the matter to its logical conclusion, I chased him away; but in two minutes he was back again staring up into the tree. I chased him off again, but he dodged around a bank and again headed toward the nest and was within 6 feet of it. Twice again during the afternoon, these tactics were repeated. I suspect him now of having robbed thrasher nest 7 more strongly than ever. Strangely, Brownie does not seem to mind him, but the two kinds of towhees and the wren- tits have no illusions about him. The cat-trap, which is always set near the latest thrasher nest, bated with meat, now that he knows the way to it, may prove his undo- ing. May 31st. Thrasher song was heard near my window at 4:35 A.M.; the earliest yet. 9 A.M. Well! Rhody, the road-runner is in the magpie cage, reflecting over his sins, but not much frightened, since he takes meat tossed to him. He made the tactical error of inspecting the inside of the cat-trap, just below the nest. (Bureau of Education and Research of the Fish and Game Commission were promptly advised by telephone). June 1st. No early morning song heard, but thrashers singing during the