The Sonoran pronghorn (''Antilocapra americana sonoriensis'') is an

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inva ...

subspecies of

pronghorn The pronghorn (, ) (''Antilocapra americana'') is a species of artiodactyl (even-toed, hoofed) mammal indigenous to interior western and central North America. Though not an antelope, it is known colloquially in North America as the American a ...

that is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the

Sonoran Desert The Sonoran Desert ( es, Desierto de Sonora) is a desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States (in Arizona ...

Conservation

Around 200 animals currently are believed to exist in

Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

, up from an estimated 21 individuals in 2002. The number of individuals in

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

is estimated to be even lower. It is considered

extirpated Local extinction, also known as extirpation, refers to a species (or other taxon) of plant or animal that ceases to exist in a chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with global extinct ...

from

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

. In 2012, announcements of two reintroductions were published in the ''

Federal Register The ''Federal Register'' (FR or sometimes Fed. Reg.) is the official journal of the federal government of the United States that contains government agency rules, proposed rules, and public notices. It is published every weekday, except on feder ...

''. One of the reintroductions was to take place at the

Barry M. Goldwater Air Force Range The Barry M. Goldwater Air Force Range or Barry M. Goldwater Range (BMGR), formerly known as Luke Air Force Range, is a bombing range in the U.S. state of Arizona, between the Mexico–United States border and Interstate 8 straddling the Cabeza Pr ...

(BMGR) in Yuma, Arizona, and the second was to be at

Kofa National Wildlife Refuge The Kofa National Wildlife Refuge is located in Arizona in the southwestern United States, northeast of Yuma and southeast of Quartzsite. The refuge, established in 1939 to protect desert bighorn sheep, encompasses over of the Yuma Desert regi ...

Obstacles to recovery

Numerous and ongoing threats exist to the survival of the Sonoran pronghorn. Not the least of these threats is the fact that much of their habitat is occupied by the BMGR, which is an active

United States Air Force The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal ...

bombing range A bombing range usually refers to a remote military aerial bombing and gunnery training range used by combat aircraft to attack ground targets (air-to-ground bombing), or a remote area reserved for researching, developing, testing and evaluatin ...

. Adjacent to the BMGR is the

Cabeza Prieta National Wildlife Refuge Cabeza Prieta National Wildlife Refuge (CPNWR) is located in southwestern Arizona in the United States, along of the Mexico–United States border. It is bordered to the north and to the west by the Barry M. Goldwater Air Force Range, to the s ...

(CPNWR), also a critical breeding area for this species. Parts of the CPNWR are off limits to visitors between mid-March and mid-July, during the fawning season, so as to minimize disturbance to herds with fawns, which can result in the loss of fawns. Despite this fact, this area too is subject to constant environmental pressure. The accompaniments of illegal trafficking of people and

drugs A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drugs are typically distinguished from food and substances that provide nutritional support. Consumption of drugs can be via inhalat ...

from Mexico (such as the construction of illegal roads and trails, reckless disposal of trash, destruction of vegetation, and contamination of water sources) have significantly degraded the habitat. The response from law enforcement agencies (such as the

U.S. Customs and Border Protection United States Customs and Border Protection (CBP) is the largest federal law enforcement agency of the United States Department of Homeland Security. It is the country's primary border control organization, charged with regulating and facilit ...

and the

Drug Enforcement Administration The Drug Enforcement Administration (DEA; ) is a Federal law enforcement in the United States, United States federal law enforcement agency under the U.S. Department of Justice tasked with combating drug trafficking and distribution within th ...

) has also exacerbated this problem.

Mortality

Living in open areas,

s in general must rely on their eyesight to avoid predators, and with population numbers so low, the Sonoran pronghorn must avoid mortality at all costs. Sources of mortality come from predators, drought, and lack of feed; these sources usually affect fawns most often, and adult mortality also occurs in drought situations. Controlling this situation is very difficult because drought is at the hand of the weather. Things that can be done are predator control on

coyotes The coyote (''Canis latrans'') is a species of canis, canine native to North America. It is smaller than its close relative, the wolf, and slightly smaller than the closely related eastern wolf and red wolf. It fills much of the same ecologica ...

and

bobcats The bobcat (''Lynx rufus''), also known as the red lynx, is a medium-sized cat native to North America. It ranges from southern Canada through most of the contiguous United States to Oaxaca in Mexico. It is listed as Least Concern on the IUC ...

, but this is yet to be studied with enough detail to be proven effective.Jill L.Bright and John J.Hervert (2005). "Adult and fawn mortality of Sonoran pronghorn." Wildlife Society Bulletin. 43(1), 43-50.

Habitat

The Sonoran pronghorn is endemic to the

. They live in open spaces and primarily forage grasses and shrubs for food. Desert pronghorn are more adapted to desert conditions, and can go longer without water.

Conservation

Obstacles to recovery

Mortality

Habitat

References

Further reading