now that there is a nest to be built. B's tactics with Nova are essentially different than with Greenie, doubtless of necessity. Nova stays away a good part of the time, whereas G was B's constant companion and co-worker on the nests. It is necessary to call Nova from abroad to keep her interest from wavering. Thus as a typical example: Until about 10 A.M. there was no sign of B at the nest, though he most probably had been there earlier. At that time he mounted the wind-screen and began calling in detached, musical phrases, evidently in response to a thrasher about 200 to 250 yards to the east that had begun, a few seconds before, to sing in a peculiarly high-pitched voice and in phrases attributed to Nova. This brought no results, so he moved to the top of the old oak and put on more power. For several minutes there was a long range duet, then the distant bird began to approach. B shifted back to the nest and sang there and Nova joined him. B came down for twigs and Nova went up into the sparrow-hawk pine and continued her full song in the same characteristic light, high-pitched voice with phrases not used by Brownie. (These notes show that in quality of tone, pitch and phrases used, Greenie was practically indistinguishable from Brownie). B continued to carry twigs to the nest diligently, and Nova to sing. B finally called loudly and N joined him, only to leave shortly. In a few moments she was back again without being called, ran to him where he was gathering twigs about 10 feet from me (an unusually bold act for her) "haighed" at him and climbed a pine close by, B continuing his work after coming to me for refreshments. He seems to be satisfied to work alone if he knows where Nova is and she will come occasionally and take a look at things. I have not yet seen her actually carry any material to the nest. Bb still holds forth at the oval lawn. He is getting new ear covers and still takes an occasional nip at my fingers.