Marshall, 1939 Othus trichopsis 4 mi. N Catagonia, 4500 ft., Santa Cruz A., Arizona July 16, 1939. Camp in wide upper Sonoran canyon facing East, & heavily timbered in spots with beautiful stands of oak. Also walnut (?), sycamore, & many other broadleaves. Sides of canyon more brushy & with dwarfed oaks. Dry creek bed in flat bottom of canyon. Canyon bottom 50 - 200 yds. wide. At bottom of this gently-sloping canyon (to E.) the Lower Sonoran zone begins. Spring in little side canyon 100 yds. S camp. After 2 coll, a poorwill at dusk (from the brushy S wall), Woody & I started down the canyon towards an especially fine stand of oaks bordering a clearing in a wide place in the valley (a Coronado Forest gate at that pt) 3 mi. down (E). It was now dark & we took about 3 2 hrs. to travel the 3 mi. I called for Othus asio most of the way - also Othus flammeolus & Strix. When we were about 200 yds. from the grove (mentioned above), heard rustling