26. and foraged lower slopes in the pinyon trees. I'm not sure that this species breeds here, but it may. The three seen were males, and those individuals did quite a bit of moving around. The best stands of Mt. Mahogany as well as the mahogany- pinyon mixtures were used by the Western Tanagers. Black-headed Grosbeaks stayed near the stream thickets, but used the edges of the pinyon woodland for singing posts. The Green-tailed Warbler preferred dense thickets of both willow and Amelanchier near water. It also seemed to require some Artemisia for its presence. The Spotted Towhee was more tolerant of many environments. Although it used both the streamside thickets and the edges of the pinyon, a litter of vegetational debris always seemed necessary for its existence. The Gray-headed Vireo was found only on the higher points in the Mt. Mahogany. The male collected was singing. Chipping Sparrows were seen in a variety of places, usually where the vegetation was mixed. It frequented the edges of the pinyon and mountain mahogany tracts near thickets. I shot a male Cassin Finch which was singing in a tall pinyon near the stream. I could not retrieve it. A female came to the place, probably the mate. Shot a Euterias dorsalis. did stuffed it.