Salmon Creek, 8 mi. west Bogus Twin Falls Co. Idaho 1935 about 20 feet from the base. The hooding paint flew off the nest as I approached, and the pair circled high overhead as I investigated the situation of the nest. Both birds left as I traversed the cliff, from the present summit of the cliff to the nest. It was situated about 6 inches from the ceiling of the overhanging rock above, and was composed mainly of Artemisia sticha averaging about 1/4 inch in diameter. The lining was fully an inch thick composed of densely matted wool of sheep with scattered particles of hemp fiber. The nest contained six eggs, light blue-green ground, with superficial streaking of light brown. Neither parent approached the nest while I was investigating. Numerous small pellets of undetermined material were scattered in and around the nest. A young Cottail was shot on the top of the cliff appearing about 1/2 the size of the parent or adult. At this age they still are rather slow and probably could be run down if no holes were convenient. A flock of 10 Red Breasted Mergansere were diving close to shore beyond the third point, and took wing as soon as my presence was detected. Three Gulls were fleeing with the Mergansine when discovered. Secured a female Cottontail between the cliffs and the lake opposite the arm of the lake. It was found to contain 8 embryos which were almost ready for birth.