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 july, 1917 SOME BIRDS O1' CENTRAL OREGON 133 Sonoran zone is the sage-brush (Artemisia tridentata). This shrub is found abundantly to the very edge of the timber and is only replaced by other vege- tation along streams and in some of the valleys. Other typical plants of this zone are the greasewood (Safcobates verraiculatus), hackberry (Celtis occi- dentalis), currant (Ribes aureum), and phlox (Phlox douglasi). The lower Cascade and Blue Mountain slopes lie within the Transition zone, as do the Deschutes and other Forest Reserves of southern Crook and northern Klamath counties. The Paulina Mountains and Mutton Mountains are small, isolated ranges more or less timbered with pine and juniper. Thc principal forest trees are the western yellow pine (Pinus ponderosa), Douglas fir (t'seudotsuga taxifolia), and grand fir (Abies grandis). In the more open country the western juniper (Juniperus occidentalis) grows extensively. Wil- low ( Salix araygdaloides), alder (Alnus rhombifolia), and cottonwood (Populus trichocarpa) are found along streams. Oak (Quercus garryana) is common on the hills near The Dalles. Other plants of this zone are cedar (Libocedrus de- ct,rrens), chokecherry (Prunus demissa), blue older (Sambucus glauca), western b:;rch ( Betula f rontalis ), wild rose (Rosa picicarpa ) , snowberry ( Symphoricarpos ovophilus), currant (Ribes coreurn), and buck-brush (Ceanothus velutinus). The following lists are given to show some of the typical species of land birds of the two zones. UPPER SONORAN SPECIES Sage Hen Brewer Blackbird Desert Sparrow Hawk Western Lark Sparrow Burrowing Owl Sage Sparrow Western Kingbird Brewer Sparrow Say Phoebe White-rumped Shrike Gray Flycatcher Sage Thrasher Dusky Horned Lark. Rock Wren TRANSITION SPECIES Rocky Mountain Hairy Woodpecker Slate-colored Sparrow White-headed Woodpecker Western Wood Power Clarke Nutcracker San Diego Red-wing Bullock Oriole Crossbill Shufeldt Junco Cassin Vireo Aechmophrus occidentalis. Lutescent Warbler Audubon Warbler Western Yellowthroat Dipper Pigmy Nuthatch Mountain Chickadee Western Bluebird Western Grebe. Breeds rather sparingly at the Paulina Marshes where it was found among the tall tules in the deepest parts of the marsh. Podilymbu perilceph. Pied-billed Grebe. Noted in the more shallow parts of th Paulina Marsh, where nests found early in June contained eggs in an advanced state of incubation. Hydrochelidon nigra surlnamensis. Black Tern. Tolerably common at Paulina Marsh, where it doubtless breeds, but no nests were found. I. arus occidentalis. Western Gull. Noted on the Columbia River near the mouth of the Desclutes, in April, 1915. I_arus californicus. California Gull. A specimen was taken at the mouth of the Deschutes on August 4, 1914. Pelicanus erythroehynchos. White Pelican. On June 1, 115, a large flock was seen in flight a few miles east of Silver Lake. Mergus ameHcanus. Morganset. Noted on the Deschutes River. Anas platyrhynchos. Mallard. On May 20, 1918, a pair of Mallards was flushed from an alfalfa field bordering an irrigation ditch near Antelope, and ten days later I found the species fairly common at the Paulina Marsh near Silver Lake. Here several