T. Code 1958 25 July Falcon pelegrines after a peregrine - fox sparrows? - which went into some willow brush growing on a steep slope just up river from the cliff. The falcon then began making a series of passes just over the top of the brush rock and forth, while the tiercel came out and waited on above her about 150 feet over the brush. They continued this tactic along the full length of the brushy slope (c.q. 1/4 mile). No bird got up. Then both birds zoomed up in strong wind and gradually drifted back to the cliff. No active nest could be found on the bluff and the falcons put up no defense as we were climbing about. Indeed, the tiercel left the area. #9 aerie: pair of adults seen on the last bluff on the left limit before Unrat. Nest on a ledge 30 ft below a brushy brink 20 ft up on a sandstone wall above a talus slope that drops 150 ft to the river. A freshly killed pectoral sandpiper was in the nest and a single downy 2+ weeks old - large f. The adult f was collected and the young