I do not know when the normal nesting season of the California Thrasher is supposed to begin, but if last year's behavior of these two birds may be considered to represent their norm, then serious activities are due about the third week of this month. While their present activities are apparently accomplishing nothing tangible--having been really scattered over several months, as these notes testify--they seem to be less diffusive now and show- ing some signs of coordination. If we have our usual February warm spell, I have little doubt that matters will be brought to a sharp focus. further 4:07 P.M. No observations were made until 4 P.M., at which time I happened to catch sight of both birds running toward the dormitory tree. They climbed up into it and were seen working on the growing twigs at Sta. D. In this case their action was entirely without the stimulus of food from me. Feb. 9th. At 8:15 A.M., as I passed by the dormitory tree the thrashers were heard talking. However, I continued to the glade and B came to me at once with new talk, in which a peculiar, low-pitched sound predominated. The nearest it can be approximated is: Yo-o-i-1-n-nk; sometimes with a soft pit following and a low ee preceding. The effect was one of pleading. About 9:30 his talk was again different. This time he worked for a short while at Sta. C, Greenie not being interested. By ten o'clock he had transferred his attention to Sta. D. I stood almost directly below it and watched him trying to make a twig "stay put"; but he could not do it, and it fell at my feet. He came down and picked it up. Although there were many others there, he wanted the same one. (I think these are twigs that have been dropped,