About 9:15 I visited the little thrashers at R's. Before I left them, they were both flying to my hand for worms quite freely. This is the first time they have done this. They are now 44 days old, have Greenie's eye color, have a little more tail length due them and a lot more length and curvature on their bills. They are much lighter in weight than B (as determined by "heft- ing" them), are smaller and redder on their backs. At 11 o'clock, while thinning peaches in the orchard, I was startled by a light rattling sound followed by a hollow note almost at my feet and the roadrunner popped out, running slowly away with backward glance at me. He seems to have ceased calling. The rattling sound is said to be made with his bill. The young thrashers, Little B and Little G, are becoming delightfully tame, coming readily to hand, and beginning to take liberties, such as: lighting on ones head and pounding away merrily. May 2nd. Early morning song by Brownie. color 9:30 A.M. Nova's eye is definitely the same as Brownie's; consequently there is no permanent difference in color between the two sexes. There may, of course, be individual differences among other thrashers, but I have not observed this as far as I know. The fluorescence of the pupils of the young birds seems to disappear about the time they leave the nest. N's eyes are larger than B's, almost certainly. The youngsters, about 9 A.M., showed no objection to three persons in the cage at the same time, coming freely to hand. Dr. Reynolds suspected that they were differentiating between persons. I have not thought so--except perhaps where there might be a striking difference between the appearance and action of the individuals concerned, and their manner of approach to the birds. I would like to think that they do, but have held, as regards thrashers, that, when having learned to associate persons with food (or vice versa) the individuality of person offering it is a matter of indifference to them, provided that