fear of groups of people; thus about 5:45 P.M., when he caught a glimpse of four visitors through the trees he fled precipi- tately and would not even allow me to approach. May 4th. At about 7:45 Rhody began singing his mournful song from the roof, keeping it up for half an hour or so, when he went to the cage to watch the magpies. Another nest in contemplation. (5-36?). About 9:30 I could not locate him, but heard him rattle-boo. Even then I could not find him until he dropped down from the tree (p.1175) where he was watched placing twigs on the 30th. April. He pulled half-buried twigs out of the soft ground and placed them as if for a new nest in what appeared to be the same spot about 20 feet from the ground. As I watched him he added more material which he tore loose from the tree itself. While placing it he cried and rattled his beak softly without vocal sound. 10:10. I found Rhody picking up twigs under the rhododendrons near the cage. He started for his new nest tree, suddenly paused, turned back toward me as if frightened, then ran to the mirror which was entirely out of his course, tapped it lightly a dozen times or so as if offering the twigs to the "other bird". Having thus conscientiously made his offering at the altar, he climbed up to his new "nest". This structure is actually already visible to the naked eye. It is at an unusual height for a roadrunner. 10:51. At 10:20 Rhody was on the ground below 4-36 looking for nesting material, but abandoned the effort and came toward me whining. I invited him to the shop for a young rat. This creature was accepted with alacrity and carried to the observatory roof by slow stages, performing at each stop. After 10 or 15 min- utes he sailed down to land near me, trotted by the shortest route (which was necessarily devious) to the mirror in order to make his devoirs, again demonstrating that, with food, his display is elaborate, whereas with nesting material, it is not. The rat was carried to nest 1-36 and eaten there, but not until he had satisfied himself that there was nobody there to receive it. (10:4: He then settled firmly in the nest. 1:40. By noon he was out again lying on the ground flat as a pan-cake, sunning himself in the spread-eagle pose, following up by an inspection of the magpies. I left him thus engaged. After lunch he took up the chase of one of Brownie's youngsters after B had quit to come to me for food. R's chase was not pressed far. Next he rushed over to watch a towhee chasing another and seemed disposed to take a hand, but his attention was diverted by the other young thrasher, whom he followed a short distance slowly until the youngster flew off. This left Rhody with nothing to do but preen and sun himself in the glade where I sat. In order to get a comfortable place in which to lie he pushed clods out from under himself by sidewise thrusts of his feet, one at a time--the only earth-moving action performed by roadrunners, with their feet, seen here. (I.e. only type) Next it was in order to start nest building, by picking up a twig and heading for No.5, changing course to present it at the mirror, dropping it there, substituting another, taking it to 5, placing it, then whining (at 1:40). At 3 P.M. R was in the cage resting upon my Upper Sonoran scenery. At 3:30 he came out and hung around me, so I decided he was wondering about mice and rats again. Accordingly I walked toward