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 144 THE CONDOR VOL. X in a fairly thick grove of box elders. A search thru several hollow trees in the vicinity soon revealed the nest. It was situated in a hollow limb of a live box NESTLING OF ROCKV MOUNTAIN SCRIiECH OWL: IN A 'IND a fledgling vith the old bird a few days later, I am pretty sure that this was the nest. The third nest I was able to sit several times and my notes, accord- ingly, are more complete. This nest, apparently an old flicker's hole, was in a small cottonwood stump,jb0ut fifteen feet up; the stump beine[ff rotten, and leaning directly ovY a mountain stream, it was not a very. safe place for a family of young birdi, I found this nest on June 4, 1.9(7 by rapping on the stump; the owl yes- ponded by peeking out of the hle and promptly dropping back agr. As I suspected young birds d be in the nest, I returned on June 19, with my camera. I enlarged the opening a little and put my hand in. The lady of the house was in possession; elder, about twenty-five feet from the ground, and contained one young bird almost ready to leave the nest. The cavity, which was in the end of the limb, vas about five inches across at the top and about two feet deep; it sloped at an angle of about thirty degrees, for a short distance, then went off in a horizontal direction; it was back here that I found the bird. While I vas at the nest, the old bird, pre- sumably the female, lit a few feet from ne, but did not show much anxiety, except to snap her bill occasionally. The second nest was found on May 28, 1907. I flushed the adult from the hollow, but, on account of the size of the tree, I could not get into it. The cavity was in the center of a huge cotton-wood stump about three feet in diameter, and fifteen feet high; it was over a foot wide at the top and nearly ten .feet deep, so it was almost impossible to get into it. Hovever, as I saw VOUNG ROCKV MOUNTAIN SCREECH O'L