The giant kangaroo rat is an endangered species of heteromyid rodent endemic to California.
The northern Idaho ground squirrel is a species of the largest genus of ground squirrels. This species and the Southern Idaho ground squirrel were previously considered conspecific, together called the Idaho ground squirrel.
The desert tortoise is a species of tortoise in the family Testudinidae. The species is native to the Mojave and Sonoran Deserts of the southwestern United States and northwestern Mexico, and to the Sinaloan thornscrub of northwestern Mexico. G. agassizii is distributed in western Arizona, southeastern California, southern Nevada, and southwestern Utah. The specific name agassizii is in honor of Swiss-American zoologist Jean Louis Rodolphe Agassiz. The desert tortoise is the official state reptile in California and Nevada.
The Hine's emerald is an endangered dragonfly species found in the United States and Canada. Populations exist in Illinois, Michigan, Missouri, Ontario, and Wisconsin. Larvae are found in shallow, flowing water in fens and marshes, and often use crayfish burrows. Major threats to the species include habitat loss and alteration, and the species is legally protected in both the United States and Canada.
Nicrophorus americanus, also known as the American burying beetle or giant carrion beetle, is a critically endangered species of beetle endemic to North America. It belongs to the order Coleoptera and the family Silphidae. The carrion beetle in North America is carnivorous, feeds on carrion and requires carrion to breed. It is also a member of one of the few genera of beetle to exhibit parental care. The decline of the American burying beetle has been attributed to habitat loss, alteration, and degradation, and they now occur in less than 10% of their historic range.
The Coachella Valley fringe-toed lizard is a species of phrynosomatid lizard.
The Houston toad, formerly Bufo houstonensis, is an endangered species of amphibian that is endemic to Texas in the United States. This toad was discovered in the late 1940s and named in 1953. It was among the first amphibians added to the United States List of Endangered Native Fish and Wildlife and is currently protected by the Endangered Species Act of 1973 as an endangered species. The Houston toad was placed as "endangered" on the IUCN Red List of Threatened Species from 1986 to 2022, and has worsened to "critically endangered" since then, with fewer than 250 mature individuals believed to remain in the wild as of 2021. Their kind is threatened every day as they continue to suffer from a loss of habitat, extreme drought, and massive wildfires. Their typical life expectancy is at least 3 years but it may exceed this number.
The Delhi Sands flower-loving fly is a subspecies of flower-loving fly, a member of the genus Rhaphiomidas in the Mydidae family. It was the first fly added to the Endangered Species List in the United States.
The Utah prairie dog is the smallest species of prairie dog endemic to the south-central steppes of the American state of Utah.
Amaranthus brownii was an annual herb in the family Amaranthaceae. The plant was found only on the small island of Nihoa in the Northwestern Hawaiian Islands, growing on rocky outcrops at altitudes of 120–215 m (394–705 ft). It was one of nine species of Amaranthus in the Hawaiian Islands, as well as the only endemic Hawaiian species of the genus. It is now considered extinct.
The bonytail chub or bonytail is a cyprinid freshwater fish native to the Colorado River basin of Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming in the southwestern United States; it has been extirpated from the part of the basin in Mexico. It was once abundant and widespread in the basin, its numbers and range have declined to the point where it has been listed as endangered since 1980 (ESA) and 1986 (IUCN), a fate shared by the other large Colorado basin endemic fish species like the Colorado pikeminnow, humpback chub, and razorback sucker. It is now the rarest of the endemic big-river fishes of the Colorado River. There are 20 species in the genus Gila, seven of which are found in Arizona.
The valley elderberry longhorn beetle is a subspecies of longhorn beetle native to the riparian forests of the Central Valley of California from Redding to Bakersfield. It is listed as a federally threatened species; a proposal to delist the insect was withdrawn in 2014.
Gammarus desperatus, commonly known as Noel's Amphipod, is a species of small, amphipod crustacean in the family Gammaridae.
Asimina tetramera, commonly known as the four-petal pawpaw, is a rare species of small tree or perennial shrub endemic to Martin and Palm Beach Counties in the state of Florida. The species is currently listed as endangered under the Endangered Species Act and as endangered by the International Union for Conservation. The four-petal pawpaw is part of the Annonaceae family alongside other Asimina species.
Allium munzii, also known by its common name, Munz's onion, is a bulb forming perennial herb endemic to Western Riverside County, California. This flower is characterized by its umbrella-like shape and flower clusters. Allium munzii is listed as endangered under the Endangered Species Act as of 1998. There are thirteen known populations in existence, and the latest population count stands at 20,000-70,000 individuals, counted in 1998. Major threats to this flower include urbanization, agriculture, clay mining, and other human activities. A recovery plan for Allium munzii is not in motion but there are steps being taken to protect this species.
Dinacoma is a small genus of beetles in the scarab family (Scarabaeidae).
Cicindela albissima, commonly called the Coral Pink Sand Dunes tiger beetle is a species of tiger beetle endemic to Coral Pink Sand Dunes State Park in southern Utah, United States. It was originally described by Rumpp in 1962 as the subspecies Cicindela limbata albissima, but mitochondrial DNA, along with the species' morphological and geographical distinctiveness, have shown that it is a separate species. C. albissima can be distinguished from other Cicindela species by its restricted range and lack of pigmentation on its elytra.
The Amargosa vole is one of 17 subspecies of the California vole. The most closely related subspecies is M. californicus vallicola.
Cicindela dorsalis dorsalis, commonly known as the Northeastern beach tiger beetle, is the largest subspecies of Eastern beach tiger beetle. In 2012, Cicindela dorsalis dorsalis was reclassified under the name Habroscelimorpha dorsalis dorsalis, but the names are used synonymously in recently published literature. Fitting to its name, the Northeastern beach tiger beetle dwells along the U.S. northeast coast in small sand burrows. The beetle is diurnal and can be spotted by its light tan coloring with dark lines and green hues on its thorax and head.
Delphinium caseyi, also known as Casey's larkspur, is a flowering plant within the family Ranunculaceae.
