. Birds of the Papago Saguaro National Monument and the Neighboring Region, Arizona . SIERRA ANCHA, LOOKING NORTHWARD FROM THE DIVIDE NEARROOSEVELT LAKE. The north-facing slopes here shown are densely covered with trees and shrubbery. Thisis the home of the black bear, mule deer, and Abert squirrel, of the wild turkey andband-tail pigeon. Bird life is abundant, composed mostly of species peculiar to thehigher mountains and never seen in the arid valleys but a few miles distant. ,.... _-. B. SIERRA ANCHA, LOOKING SOUTHEASTWARD FROM THE DIVIDE. This view of the arid and treeless slopes is from a
. Birds of the Papago Saguaro National Monument and the Neighboring Region, Arizona . SIERRA ANCHA, LOOKING NORTHWARD FROM THE DIVIDE NEARROOSEVELT LAKE. The north-facing slopes here shown are densely covered with trees and shrubbery. Thisis the home of the black bear, mule deer, and Abert squirrel, of the wild turkey andband-tail pigeon. Bird life is abundant, composed mostly of species peculiar to thehigher mountains and never seen in the arid valleys but a few miles distant. ,.... _-. B. SIERRA ANCHA, LOOKING SOUTHEASTWARD FROM THE DIVIDE. This view of the arid and treeless slopes is from a point but a few rods distant from the spotwhere the upper view was photographed. Animal life is scarce here, and for the most partconsists of species that are rarely or never seen on the cool, north-facing hillsides. BIRDS OF THE PAPAGO SAGUAEO NATIONAL MONUMENT. 23 passage, of birds at any rate, yet with nothing in common in theanimal and plant life of the two regions. As an object lesson in the puzzling problem of the distributionof animals and plants, it is well worth while to turn aside from thesameness of the highway through the valleys, travel 20 miles intothese mountains, and see the changes accompanying a drop in tem-perature of but a few degrees. Fifty-seven species of birds wereobserved in the Transition Zone of the Sierra Ancha during June;52 about Roosevelt Lake. Only 14 species were noted at both these 14, one (the desert quail) has been artificially intro
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Keywords: ., bookcentury1900, bookdecade1920, bookidbirdsofpapag, bookyear1920
