Marshall, 1939 5. Otus trichopsis Patagonia, July 16 continued to call. I turned on my light & stopped calling & started to stalk the bird. It moved to a very dense oak 30-yds from Woody & called. I saw it sitting half-way up in the tree & on an horiz. branch. good clear yellow eyesine. I fired & missed altogether. I called to Woody & he said the bird was still hooting. I saw it on the same tree & about a yard closer to the trunk than before. thus. It still hooted steadily & this time I collected it at close range with .410. 3'667. No more were heard all the way back to camp. There were many favorable nesting sites in dead hollow oaks in the canyon, but I located no nests.