the breeze ruffled his feathers. At 1:10 he left for the cage; besides attending to the magpies he rested in the inner compartment as if liking the surroundings. Test to determine if R would offer mouse to mags. Did not, but offered to own reflection. A new nest site? "Cries" with mouse in bill; another "first". Parallel behavior of A & T. Strategy of game with magpies. April 11th. R greets me before I see him. R starts third nest of the year finding them, I returned to the cage at 7:40. No Rhody. It occurred to me to look in the tree where he took the mouse yesterday and whined at me, and, sure enough, Rhody was hard at work on nest 3--36, up and down, down and up. Maybe No. 4 will be it! The rest of the day was occupied in work on No.3, playing with magpies, surveying the landscape from the chimney top, resting in the cage and in 3--36, etc. Brownie and Nova start second nest this is No.14 for B. Brownie and Nova have started their second nest of the year; They are still feeding the first brood. This seemed a good opportunity to determine if he would give his mouse display for the benefit of the magpies, now that he is so fascinated with them, thus giving perhaps, some indication whether he differentiates between them and other birds (I.e. road-runners, I mean) as mating prospects. Accordingly I gave him a live mouse while he was still in the cage near the magpies. He immediately began his mouse-display with vocal accompaniment, but not for the magpies, as he turned away from them and performed at various points inside the inner cage. When he came out he had to pass the magpies. (Compare previous notes of the last few days, where it is shown that he has been "unable" to get out of the cage at first trial, due to the distraction of the magpies). This, then would be the interest moment. However, he went right by them without a pause, came past me, went to the mirror outside (which, as these notes show, he has studiously ignored when courting A and T) and offered the mouse with the usual courting byplay to his own reflection. You see? He wanted a roadrunner to whom to give it; that is what it looked like. I do not guarantee the interpretation of the act. For 30 minutes more he carried the mouse about, never more than 25 yards from the cage, repeating his act to nothing in particular, then took it to 2--36. During this interval, however, he had twice taken it up to a good looking nest site in a tree nearby which he has several times considered as a possibility. Each time I approached him while he was quietly sitting there, he whined plaintively at me with the mouse still in his bill. He has never done this before when carrying anything. As pointed out more than once previously, he has never been heard to "cry" thus for any bird, or for that matter, any creature other than myself. (The parallel use of the whine by A and T differs only in that they whined also for men they knew, and T about twice to Archie. But in the latter case, the whines were merely continuations of those first directed at me and then switched to A on his sudden arrival). (Note finished at 2:13). I did not see him at the cage again until about 5 P.M. when he had a long game with the magpies. When the time approached for him to go to his roost he altered his strategy to that described yesterday for the same hour of the day, i.e. he would ostensibly depart for his roost, come back in a hurry, etc. As I approached the cage at 7:05 A.M., Rhody not visible, a faint whine sounded nearby and I thought one of the youngsters was calling, but it proved to be Rhody, sunning on the ground 6 feet away. It is singular that his whine should be so much more feeble than those of the young birds. After a round about the tract looking for A and T, without