Mayhew 1947 May 22 Western Robin U.C. campus, Alameda Co., Calif. nest with the same rolling action as before, still facing west. At 3:24 P.M. she began to preen her remiges while still sitting on the nest. At 3:29 P.M. a pair of Busk-tits noisily entered the tree about 12 feet above the nest without disturbing the Robin. They left a moment later, while she continued to preen her remiges. At 3:32 P.M. she settled down again. At 3:37 P.M. she left the nest & landed on the lawn about 75 feet south of the nest, where she began immediately to look for worms. At 3:39 P.M. she returned to the nest, standing on the south edge of it for a moment, then settling on the nest facing west. At 3:46 P.M. a dr Robin started working his way in a circle around the tree about 50 feet from the trunk. He ran a few steps, stopped then ran a few more steps & stopped, until he had covered a distance of about 75 feet. The ? took no notice of him this time. In a few minutes he flew away without any help from the ?, at 3:50 P.M. the ? shifted her position on the nest so that she is now facing south. She was still sitting on the nest facing south when I left at 4:04 P.M. She moved her head from side to side occasionally, but other