Remsen, J.V. 1974 Spotted Owl Strix occidentalis Apr. 26 Tomales Bay State Park, Marin Co., Calif: 1 h.o - soft nasal hoot. Did not respond to imitations or squeaking although it continued to call. Found in tall Bishop Pine grove about 100 yds. down Jepson Trail May 3 Alice Eastwood Camp, Muir Woods Nat. Mon., Marin Co. Calif: One hooting and one whistling together on trail beyond camp in pre-dawn at 0530 - began calling in response to my imitations, but they would not come in to view, and left after about 10 min. A half-hour later much further down the trail, I saw one perched in the open in the dim early morning light not 20' away and only 12' up on a Tan-oak sapling. It allowed us to watch it in the flashlight for 5 min. before moving to a new perch 50' away, but we relocated it easily and watched it for another 15 min. or so, during which we also located another bird which also stayed in view for 10-15 min. The first bird hooted but also gave a softer version of the rising whistle, which was the only call given by the second bird. We assumed the hooter to be the male and the whistler to be the female. They did not seem particularly responsive to my imitations despite, at least to my ear, my hooting being nearly identical with the owl's. The hooter was more prone to hooting while I was imitating it. Finally the male disappeared into the woods but the female remained, but we could not locate her after she flew into a douglas-fir grove. She continued to whistle (actually a high-pitched scream) long after the male disappeared. We speculated that she might have returned to an invisible nest, and in fact the douglas-fir with its top removed, leaving a stump, seemed to be in the general vicinity from whence her calls came. The birds were extremely tame and did