File:Mohagany Mountain, Sheldon National Wildlife Refuge, Nevada (11129008255).jpg
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DescriptionMohagany Mountain, Sheldon National Wildlife Refuge, Nevada (11129008255).jpg |
The Sheldon National Wildlife Refuge is a 57,304-acre (23,190 ha) national wildlife refuge located on the northern border of the U.S. state of Nevada. A very small part extends northward into Oregon. It is managed by the United States Fish and Wildlife Service as the Nevada component of the Sheldon-Hart Mountain National Wildlife Refuge Complex, which is headquartered in Lakeview, Oregon. The Sheldon Refuge is noted for its population of wild horses. In 1931, the refuge was established under executive order to carry out three central goals: First, the refuge was to provide a habitat for the "antelope" (more properly called the pronghorn), an animal whose population was in decline during the early 1900s. Second, conservation efforts were put forth to protect native fish, wildlife and plants. Finally, the refuge was to serve as an inviolate migratory bird sanctuary. Advocates characterize Sheldon as one of the few intact sagebrush steppe ecosystems in the Great Basin, one that hosts a variety of wildlife endemic to the unique environment. Desert fishes, greater sage-grouse, migratory birds, mule deer and the pygmy rabbit are all residents of the refuge. The Sheldon National Wildlife Refuge occupies an arid zone of volcanic terrain. Rockhounds search for semiprecious stones such as fire opals. Geothermal hot springs provide some water. The dominant ecosystem plant life consists of drought-tolerant species such as sagebrush, juniper, mountain mahogany, bitterbrush, and aspen. The elevation ranges from 4,100 feet (1,200 m) to 7,200 feet (2,200 m) above sea level. In this forbidding landscape lives a large population of free-range fauna, with the American mustang, the so-called "wild horse" of the American West, being the best known. There are also large herds of mule deer, an estimated 3,500 pronghorn, and a small but self-sustaining population of bighorn sheep. The bighorn are not strictly native to the Sheldon Refuge, having been extirpated there during the frontier era and successfully reintroduced about 1930. The pronghorn "antelope" played a key role in the history of the Refuge, as approximately 94 percent of the current protected land area was originally set aside as the Charles Sheldon Antelope Range in 1936. The Refuge is the home of an endemic fish species of limited geographic distribution, the Alvord chub. The nearest community of any size is Denio, Nevada, 14 miles from the Refuge's eastern boundary. The nearest divided highway is Interstate 80 in Winnemucca, Nevada, approximately 100 miles to the south. en.wikipedia.org/wiki/Sheldon_National_Wildlife_Refuge en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_... |
Date | |
Source | Mohagany Mountain, Sheldon National Wildlife Refuge, Nevada |
Author | Ken Lund from Reno, Nevada, USA |
Camera location | 41° 37′ 29.95″ N, 119° 19′ 57.53″ W | View this and other nearby images on: OpenStreetMap | 41.624986; -119.332648 |
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This image was originally posted to Flickr by Ken Lund at https://flickr.com/photos/75683070@N00/11129008255. It was reviewed on 5 December 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-sa-2.0. |
5 December 2015
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current | 22:05, 5 December 2015 | 4,000 × 3,000 (2.25 MB) | INeverCry (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot SX130 IS |
Exposure time | 1/400 sec (0.0025) |
F-number | f/3.5 |
ISO speed rating | 80 |
Date and time of data generation | 05:42, 29 November 2013 |
Lens focal length | 5.413 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 05:42, 29 November 2013 |
Y and C positioning | Co-sited |
Exif version | 2.3 |
Date and time of digitizing | 05:42, 29 November 2013 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 8.65625 |
APEX aperture | 3.625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,393.442622951 |
Focal plane Y resolution | 16,393.442622951 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Landscape |
Rating (out of 5) | 0 |