Filtering by
- All Subjects: Grand Canyon National Park (Ariz.)
- All Subjects: Pima County (Ariz.)
- Creators: Campbell, Myrtle
- Creators: Douglas, R. Douglas
Mr. Proudfoot, the leading pygmy-owl biologist in the United States, has worked for the last two years to gather and analyze the data that allows us to address issues regarding the genetic viability of ferruginous pygmy-owls in Arizona and to establish a framework for future management efforts. The two major questions addressed are (1) do populations of concern lack genetic variation relative to putative healthy populations, and (2) how unique are geographically distinct populations within a species of special concern?
Black and white print of people riding mules down a trail. Circa 1940-1949.
Black and white print of the south rim from Tuweep.
Sepia stereo card of a man sitting on a rock with printed annotation, "(12) Down the Granite Gorge of the Colorado (1,200 feet deep) from Peritese Point, Grand Canyon of Arizona. Copyright 1903 by Underwood & Underwood."
Black and white print of man and woman sitting at an overlook.
Black and white print overlooking the canyon with clouds below the canyon's highest elevations. Circa 1940-1949.
Black and white print of people riding mules down a steep trail. Circa 1940-1949.
