1430 Later, in the afternoon, about 5 o'clock (it was raining) I found Brownie sitting very still under a ceanothus where it was fairly dry. He answered with little gurgles when I spoke to him: came and took one worm, ate it, wanted no more, and retired to his shelter . About 3 P.M. I found Rhody in the cage studying the magpies. (He should be able to write a book about them now). He came out as soon as I walked toward the tool-house, got his mouse and fol- lowed me to this room, but would not come inside, preferring to stand in the door facing me and go through his ritual. He fol- lowed this by taking the mouse to all windows near at hand and pressing it against the glass. April 9th. Nothing was seen or heard of Brownie up to this time (10 A.M.). When I was looking for Rhody about 9:30 and had decided that he was off on tour, a rustle behind me and he stepped out from under a rhododendron, lowered his head almost to the ground and cried, shaking his head like a palsied old man. Of course he wanted a mouse and followed to the tool-house for it, taking it eagerly with ritual and then displayed at the nearest window. For some reason he now laid the mouse down, came back to the tool-house door and cried. I now offered him a small, jet-black mouse in place of the large white one abandoned. This he took at once, displayed and trotted off with it content- edly down the lower road as if headed for the Scamells' or the west lot. I did not follow. These notes have shown that Rhody, on previous occasions, has often exercised undoubted discrimination in choice of mice, re- fusing to accept any until one of the right size was offered. Here is an instance where he accepted a mouse, apparently with finality as suited to whatever his purpose was, only to abandon it and make deliberate application for a substitute which was promptly taken. This substitute, again, received, at the outset, different treatment than given the first one in that it was im- mediately taken on what appeared to be the beginning of a longer journey. The first inference suggested here (probably incorrectly) is that the larger mouse was too heavy for an extended tour. 10:33 A.M. After writing the above entry I went out to see how Rhody's actual performance supported the above speculation. I went directly to his roost tree and called. He poked his head up from the nest in the house (mouseless) and sailed down and began to pick at nesting material, abandoned this enterprise, strolled about aimlessly, watched a Cooper hawk circling about (without freezing) crossed the street (Sandringham Road) to the west and composed himself for a good back sunning. I had to leave him there, having other engagements, at 10:25. At 2 P.M. Rhody trotted to me carrying a fat lizard. I was much flattered at this attention until I realized that I happened to be standing just where he wanted to go and cut no figure in his plans whatever. He passed me within 3 feet without even coot-coot- ing and went on down the driveway on his regular route to the west lot via the Scamells' dining room window. There he pressed the lizard against the glass repeatedly, then retired to the rail- ing of their porch to think matters over for ten minutes; but he proceeded diagonally across the street toward his roost; but at the corner he saw a man approaching on the sidewalk, so he