Using the conversion factor of p.1008, this would make the indications in grams as follows: Archie 348 to 377 Terry 348 348 is the weight for Archie on July .4th., A being 261. No great reliance can be placed in these figures, but it is safe to say that Terry has been catching up to his nest-mate, and eye-estimates approximate the truth. More about the Ma cry and accompany- ing behavior. Archie, perhaps from the example of Terry, is now becoming addicted to this behavior. More in detail than on p.1103: If on a shelf or on the ground, the neck is stretched out fully parallel to the surface upon which the bird is resting, or even laid flat upon it, mouth wide open, head vibrating from side to side. If there are small objects such as twigs, leaves or stones within convenient reach, the bird will often pick them up and worry them. At times, also, it will run to a weed and begin to pull leaves off of it. If on a perch it will either stretch out its neck as noted above, or else extend it vertically downward far below its feet, ma-ing with wide open mouth. (It is not perhaps really a ma, but that designation will serve to identify it). About noon (24th.) Terry in a sand-box in the S.E. corner about 4 feet above the ground, started ma-ing when he saw me com- ing. Archie, on the ground, immediately ran and picked up a stone, about walnut size, flew up and joined T in the same demonstration, dropping the stone. I had been in the cage with them a few min- utes earlier giving them meal-worms. At 3 P.M. I left the cage where A and T, alternately, had been lying on my shoulder and lap. As I passed along the front of the cage, outside, both began ma-ing again. They certainly could not have been hungry, as there was plenty of food in the cage and they seemed satisfied with what I had handed them while in it. But I went in at once to see what it was all about. They would not take meat, nor were they particularly keen about meal-worms. Terry, however, drank thirstily from a glass of water held out to him, although there is always plenty in the cage. At 3:16 P.M. I returned with 3 newts (One the thick-heavy kind and two the worm-like very wriggly kind--I suppose they are all newts). Both birds began their ma on seeing me, but they did not want the newts. (Archie likes them, but Terry will never take the large ones and is more or less indifferent to the small ones). They did take a meal-worm or two, but were soon satisfied. Hence it would appear that the occasion for the present greeting was not hunger. January 25th. and 26th. During this period Rhody, although present as usual, was using his spring song less; in fact it was not heard at all on the 26th. On one occasion, when he was standing about 3 feet in front of me where I was crouched talking to him and trying to induce him to let me weigh him, he startled by uttering a tremendous "rattle- bo" right in my face. January 27th.