March 8th. Anand T and cat. At 7:30 a large cat was in the trap alongside the wire of the outer cage. A and T were in the inner cage with the door closed and could not see the cat. There had been no disturbance during the night. I let them into the outer compartment. They heard the cat mewing and went to investigate, but could not see it. Archie climbed to a perch to look down upon the trap. When he saw the cat, he cocked up his tail and uttered a rapid series of rattle-boos. T climbed to my shoulder to have a look also, but did not appear to mind the cat. Suddenly Archie flew into a violent panic, caught his foot in a cord attached to a door that had become displaced, and hung there by one foot flapping violently. He freed himself before I could reach him. He had already cut his forehead again. He retired to the upper portion of the cage and remained in seclusion for a half hour or so, wary and watchful. Terry, strangely, since he is the more sensitive to untoward events, remained calm throughout. Here is evidence of one cause of night (or early morning) alarms, and a probable illustration of the value of the roof covers in decreasing their liability to occur. At the same time, it shows that only complete covering of the cage (or elimination of the predisposing causes) can prevent recurrences. Sunning. By 8 o'clock it was already 72 at the cage. There was little sunning by either bird, and then only for a few seconds at a time and at long intervals. When the air temperature reached about 80, at the cage, where it remained until late in the afternoon, there was no sunning of the open type ("split-down-the-back," "hollow bowl") at all. Light from the standard surface, even in the early cours ran from 900 foot-candles to beyond the limits of the scale. (This instrument reads up to 1000). However, about 3 P.M., with light at 900, temp. 80, Archie did the "spread-eagle" type in full sun. A few minutes later, Rhody, who had been loafing around most of the day, sometimes going off on short searches for a mate, came out of the shade and the breeze where he had been resting nearby, into the sun. Temperature conditions were such as to justify the expectation (also Archie's example) that, if he did sun himself, he would use the spread-eagle method. He had not been seen in that pose for several (?) months, but I suggested to him verbally that if he were to run true to form and support my tentative conclusions (based upon previous observations) he should not use the open type, but the spread-eagle type, if he sunned at all; and this is exactly what he did. I gave him a mouse which he carried about (and off) returning in about 1½ hours without it. Light was now 900 and temp. 72. These conditions seemed to call for the open pose, in the event of his deciding to sun himself; and he performed accordingly. From all of these observations, as well as from many not recorded in these notes, I feel justified in the deduction that, insofar as the senses of the road-runner participate in the action, sunning is resorted to solely for the purpose of warmth, and the pose adopted depends upon the temperature conditions of the im- mediate surroundings. In neither sunning posture is the preen gland exposed, nor are the feathers on the back and rump raised-- except when preening forms a part of the act. Radiant heat is what the bird wants. Terry did not participate in any of the spread-eagle poses, in fact was not seen to sun himself except during the early and late hours of the day. As a matter of fact, he was quite