birds where it is calm, but noisy from the wind. (Temp. 67). 11:00 A.M. (Temp. 74) 12:00 M. ( " 77) 12:20 P.M. ( " 78) I watched the young birds in the mottled Too warm for young and old. Similar be- havior. shade indoors. The smaller, when it got too warm, opened its bill, the other climbed up on to the rim of the nest and poised with open wings, but did not open its bill. I had already, as a first to this one guess, tentatively ascribed characteristics which, in addition to greater size, seemed to be more appropriate to a male bird than to a female one. It is noisier, more inclined to climb about and less tractable. (Probably it is also the older). I went out to B, though too see B&G in the glade. G came first cool and calm. B came next, warm, takes sun bath. running with bill open and perched on my knee keeping his bill open and wings spread as long as he was there. He then took a long sun- bath, which is curious if he was already too warm . He was then joined by G and both of them were "sun-fitting" about a foot apart. especially B's/me Plumage thicker? Their plumage impressed as being much more voluminous than earlier in the year, as they spread it out, and perhaps that is why B feels the heat more. I could not help noting the apparent coin- cidence between the reactions of the male and the suspected male towards the heat of the direct sun. Males hotter birds? Consult Mr. Brock About 2:30 I took the young thrashers down to Mr. J.W.Brock re care of young. for suggestions as to food and care and to give him an opportunity to pass upon their fitness. He considered them in very good condition and made recommendations as to feeding in addition to those already kindly furnished by him. As a result the proportion of meal-worms will be increased and the soft food will be fed thinner, especially in warm weather. Reaction of parents to young. On my return about 3:15 I took the young birds to the glade. B chose this moment to be absent, but G came for worms, and although she looked at her offspring, she showed no interest in them. 3:35. As it gets cooler they are showing more activity, comb-