heavily folliaged oak growing at the north east corner of the property. beside B I believe Bb the only other thrasher here that would have brooked the intrusion to the extent that this one did. August 14th. Plenty of early morning song. Pat and Neo. About 9 A.M. I went to the Reynolds's. Pat was digging next doer, but finally returned to the aviary and ate and drank hugely. Evidently this business of being at large has its disadvantages. He concerned was unconcerned when I followed him into the cage and took worms offer- ed. I am told that Neo and Pat seem to alternate more or less in their appearances about the place, but both patronize the aviary. On my return here B, Nova and one youngster were seen together. B came into the upper garden and bathed in the pool under the rhoden- dron, singing while bathing--a new performance. Plenty undersong. Lots of undersong by B during the day, occasional full song and resting periods in the dorm. Both youngsters still here. August 15th. Thrasher song "everywhere". Frequent early morning song, both here and at Dr. Reynolds's. Thrashers appear to be abundant now in this vicinity. All four birds still here. Attrition policy effective? There was a mild pursuit by B about 6 P.M., but he did not succeed in getting to close quarters and was easily eluded. Nevertheless, a policy of occasional mild attrition may be as effective in the end as the vigorous assault in relays used by Brownie and Greenie. August 16th. Early song. There was early morning song. About 9:30 I went out to size up the thrasher situation. Bb came to me shortly in the glade, and in a few minutes, another one walked across it unconcernedly and disappeared to the west. A few minutes later Brownie was seen chasing a thrasher along the road, but not