1112 February 3rd. At 9:30 A.M. Brownie was found working at his new nest. It is where located yesterday. Rhody was singing about 30 feet away, paying no attention to B's operations. He looked with interest at a freshly killed mouse, but did not want it. Archie and Terry each had a mouse, although they had eaten some meat an hour or so earlier. About 10:30 Terry cried when I approached the cage. It seemed a good opportunity to prove (since he was presumably well fed for the time being) that here was a clear case of the call being one of recognition and not a request for food. Consequently I entered the cage and offered him meat, which he promptly ate! February 4 th to 6th, incl. During this period Brownie continued to work in leisurely fashion at his nest. Nova is there with him at times, though I have not seen her actually working. B is already "nest conscious", in that when he is away from it he constantly looks in that direction and runs toward it when it is approached by jays or there are other happenings in the vicinity to make him uneasy. Occasionally when I approach it and call he will leave it and fly directly to my hand. His vocal activities now are largely confined to efforts to summon Nova when she is absent, which is often. History, as it concerns her, is repeating itself. His whistling-for-the-dog call followed by the kissing sound is inexpressibly human. It is an exact duplicate of a human per- formance, is often used and, moreover, it works, seldom failing to bring Nova to him if she is anywhere near. I suppose this is really primarily a case of mimicry, but in the end it has with little doubt developed into a conscious, intentional call to his mate. It seems clear that he has, from experience, learned that this particular call brings about the result he is seeking, and this, to my mind implies a considerable degree of intelligence. In any case, it is remarkable that a bird should use precisely the same "tune" as a man to call a fellow creature from a distance. Rhody continues to call unsuccessfully for a mate, mostly during the forenoons. In this he excessively modern in method, patterning himself upon the young human male of today who honks his horn out in the street knowing that the feminine object of his attentions will rush out of the house precipitately and climb obediently into his motor car. Thus Rhody seems to expect that there is no need for him to travel far from here--she'll come. When in singing mood, he is not at all bashful. He will sing "right in my face", say 6 feet away on the ground in front of me. At such times I sometimes catch that same peculiar overtone mentioned herein once before, as if some exceedingly light, thin, metallic part of his vocal apparatus were not screwed down quite tight enough and vibrated rapidly. (Somewhat like the effect given by a piece of paper laid upon the strings of a piano). It seems to be an accident when it happens, and usually occurs on only one or two of his coos in a series. Usually the first one only, and then not often.