(362) expressed quantitatively in decibels. August 31st. Cool notes About 8 A.M. one thrasher was calling loudly "Kwee'-lick, kweelick" outside the glade from the pine trees at the north boundary. The same place and the same call as yesterday morning. On coming to me one of them continued the call up to the moment of coming to hand. It is one which I have seldom heard. I would like to know its meaning. Greenie answered it melodiously, but loudly from the oaks near the easterly line and came over to join his mate. They both went off toward the berry patch in a few minutes. Jays and racer 1:45 P.M. California Jays were making a lot of noise near the ber- ry patch. Investigation showed that they had located a yellow-bellied racer and were following it through the bushes, but being very careful to keep up in the branches. This gives an interesting comparison with the behavior of the thrashers under similar conditions. The thrashers were not in sight, so I lost the opportunity of seeing if their dislike of these creatures (the snakes) extended beyond the nesting period. After the snake had disappeared, the thrashers came, but I was not able to get them to understand that there was a snake around nearby for their delectation. Progress of moult The thrasher full song has not been heard for a day or two and the undersong seems to be receiving less attention. Brownie is getting quite respectable in appearance and is somewhat in advance of Greenie. Both birds give the impression of being lighter and more ashy in hue than before the moult. The bluish gray patches are disappearing rapidly. 6:00 P.M. Toward the end of the afternoon both thrashers sang their undersongs for many minutes. Greenie's at times approaching full song. About 5 o'clock I entered the glade with a visitor. At the time singing could be heard from some point outside. In 2 or 3 minutes Brownie came trotting into the glade, singing all the way, and jumped up to my knee with one last note, much to my visitor's delight.