Twining 1935 June 5, 1935 apart. In these rocks we shot two Citellas, which appeared very much like Oregamus, but with more orange-brown on the back, and with no much red in the tail. The tail was dark, almost black, fringed with buff. The call was a rapid series of rather high notes, run together, and trailing off toward the end, sounding a little like a sound produced by rapidly running the fingernail the length of a metal comb. Marmot feces and droppings were found in the rocks but none were seen. A Marsh Hawk circled over the ridge and Oldrich saw two Golden Eagles fly over, and disappear over the ridge of Mount Harrison. I set 11 traps this evening half in Artemesia near the stream below camp and half in the woods on the north facing slope of the canyon. Most of the traps in the woods were set near fallen logs. June 6, 1935 Collected traps and found that only those traps set in or near Artemesia brought results. Caught 3 Perougeus which are probably sororensis. While returning from the trap line I stopped in a dense grove of Aspens and watched several Violet Green Swallows flying about in the Aspens acting very much like flycatchers. Instead of sailing above the trees they often flew around amongst the trees, perching frequently and sallging out after insects. Two pairs were observed feeding young in holes of the same tree, a dead Aspen in the center of the grove. Western Warbling Vireos, and House Wrens were singing nearby, but showed no signs of nesting.