H. Twining 1935 Salmon Cr. Reservoir 8 mi. W. Rogerson Twin Falls Co. Idaho May 15, 1935- around for a Horned Owls nest found by Davis yesterday. The owls nest was not found but we did locate a Prairie Falcons nest in a broad slit about 100 feet high on the east cliff. I wounded a Sharp Shinned Hawk while it was darting up the canyon but it fell in a dense clump of Ribes and Cornus, and was not retrieved. Tolmie, Yellow, and Audubon Warblers were all seen in the willows of the canyon bottom. A Calliope Hummer was observed diving over a female in a small clump of Ribes. Diving was rapid and continuous as a series of high dives one after another with no swinging low dives as is characteristic of the Allen or Anna Hummers. The note at the bottom of the dive was a high-pitched wheee slowly trailing off at the end on the upward swoop. Copulation was observed to take place in the lower branches of a Ribes but details were not seen. One Broad Tailed Hummer was also seen but only for a moment as it flew past. A pair of Nighthawks flew high above the canyon and continued eastward. An Osprey circled once around the canyon giving the appearance of a large gull, and lit on the cliffs below us. The Horned Owl was seen once as it flew up the canyon past us. The song of the Canyon Wren intermingled with that of the Rock Wren was again continuously heard in the canyon bottom.