1515 The tsee poo (although that is not an accurate description of the sound) consists of two notes and octave apart (?) the first being the higher at about two octaves above middle C. I did not respond to C's yipping and remained outside the cage. C now picked up a twig about one foot long, began to talk volubly as he carried it up into a corner where there was no place where it would remain. I then entered the cage, picked up the twig and, followed by C, entered the inner cage. C was finished with his twig, so I offered it to Okii, who was on a shelf under the nest looking very "wooden". Instead of taking it, he bit me ungraciously and jumped up to the nest. I offered it to him there and he flew away with it to the hanging sleeping-place made for the young road-runners. There he placed it carefully, talking, but waynted no more. Chiisai was now digging under my feet and was soon joined by Okii. Whenever I shifted a foot, they then went there to dig. A shadow at my feet now puzzled me until I looked up and saw Rhody on the roof. He proved in receptive mood and followed to the yard for his mouse, the young thrashers following me to the doors of the cage as I left--presumably to dig under the soles of my shoes again if I should stop. This is a typical action of theirs. In slightly less than an hour later Rhody followed me to the yard for another mouse. September 5th and 6th. During this period the young thrashers' song was heard only while digging; both birds being about equal participants, although Okii perhaps sang a little more than C. Chiisai was heard to vary the musical phrase of the 4th by in- verting the order of the introductory notes, singing them as cg, cg, cg instead of gc, gc, gc. As noted in the case of Brownie when most of the contour feathers had been replaced, the birds are now lighter in hue and heads and backs more of the tone of a mourning dove. Their ear coverts are now moulting and the ear holes are con- spicuous. The "mane" has disappeared from both and the backs of their necks are almost bare. They still have several of the old feathers left in their tails. I see no signs of moulting of flight feathers, but at least one row of wing coverts has been entirely replaced (or perhaps added?). Their irides show a constant difference in hue still. There is now no conspicuous difference in size between the two birds. To detect any both birds have to be viewed at the same distance and the same pose and quite still--not an easy set of con- ditions to bring about. On the 6th Chiisai showed marked renewal of the nesting complex but accomplished nothing. Okii was less active in this respect. Rhody is still actively shedding contour feathers, but never seems to get shabby, i.e. very shabby. He seems satisfied with two mice a day and wanders little at present, much of his time being spent on or near the cage or on his favored oak branch. The "optimum" acacia is neglected, but the one at the cage is still in use. Okii and Chiisai do not always scrip on seeing him now.