Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the most populous county in the United States, with 9,861,224 residents estimated in 2022. Its population is greater than that of 40 individual U.S. states. Comprising 88 incorporated cities and many unincorporated areas within a total area of 4,083 square miles (10,570 km2), it is home to more than a quarter of Californians and is one of the most ethnically diverse U.S. counties. The county's seat, Los Angeles, is the second most populous city in the United States and the most populous city in California, with 3,822,238 residents estimated in 2022.
The San Gabriel Mountains comprise a mountain range located in northern Los Angeles County and western San Bernardino County, California, United States. The mountain range is part of the Transverse Ranges and lies between the Los Angeles Basin and the Mojave Desert, with Interstate 5 to the west and Interstate 15 to the east. The range lies in, and is surrounded by, the Angeles and San Bernardino National Forests, with the San Andreas Fault as its northern border.
The San Gabriel Valley, often referred to by its initials as SGV, is one of the principal valleys of Southern California, with the city of Los Angeles directly bordering it to the west, and occupying the vast majority of the southeastern part of Los Angeles County. Surrounding landforms and other features include the following:
The Transverse Ranges are a group of mountain ranges of southern California, in the Pacific Coast Ranges physiographic region in North America. The Transverse Ranges begin at the southern end of the California Coast Ranges and lie within Santa Barbara, Ventura, Los Angeles, San Bernardino, Riverside and Kern counties. The Peninsular Ranges lie to the south. The name Transverse Ranges is due to their east–west orientation, making them transverse to the general northwest–southeast orientation of most of California's coastal mountains.
The Angeles National Forest (ANF) of the U.S. Forest Service is located in the San Gabriel Mountains and Sierra Pelona Mountains, primarily within Los Angeles County in southern California. The ANF manages a majority of the San Gabriel Mountains National Monument.
The San Gabriel River is a mostly urban waterway flowing 58 miles (93 km) southward through Los Angeles and Orange Counties, California in the United States. It is the central of three major rivers draining the Greater Los Angeles Area, the others being the Los Angeles River and Santa Ana River. The river's watershed stretches from the rugged San Gabriel Mountains to the heavily developed San Gabriel Valley and a significant part of the Los Angeles coastal plain, emptying into the Pacific Ocean between the cities of Long Beach and Seal Beach.
The Verdugo Mountains, also known as the Verdugo Hills or simply The Verdugos, are a small, rugged mountain range of the Transverse Ranges system in Los Angeles County, California. Located just south of the western San Gabriel Mountains, the Verdugo Mountains region incorporates the cities of Burbank, Glendale, Pasadena, and La Cañada Flintridge; the unincorporated communities of Altadena and La Crescenta-Montrose; as well as the City of Los Angeles neighborhood of Sunland-Tujunga.
California's 25th State Senatorial district is one of 40 California State Senate districts. It is currently represented by Democrat Anthony Portantino of Burbank.
Euxoa messoria, the darksided cutworm or reaper dart, is a moth of the family Noctuidae. The species was first described by Thaddeus William Harris in 1841. It is found from Newfoundland west to Yukon, south to Virginia and Missouri in the east and New Mexico, Arizona and California in the west.
Apamea digitula is a moth of the family Noctuidae. It was described from the Laguna Mountains of San Diego County, California, in 2006. It is also known from western Oregon.
Apamea bernardino is a moth of the family Noctuidae. It is known only from the San Bernardino Mountains of California, where it lives in coniferous forests above 2000 meters in elevation. It was first described in 2000 from a specimen collected at Barton Flats.
Apamea scoparia is a moth of the family Noctuidae first described by Kauri Mikkola, Tomas Mustelin and J. Donald Lafontaine in 2000. It is one of the most common and widespread North American Apamea, being distributed from Newfoundland and Labrador to Alaska and British Columbia, and south to California and Arizona.
Euxoa tessellata, the tessellate dart or striped cutworm is a moth of the family Noctuidae. It is the most widespread Euxoa-species in North America. It is found from Newfoundland to Alaska, south in the west to California, Arizona, New Mexico, south in the east to Florida. It seems to be absent from Texas and adjacent eastern states.
Lasionycta uniformis is a moth of the family Noctuidae. It is widely distributed in the mountains of western North America. It occurs from southern Yukon to northern California and Colorado, with an isolated population in eastern Quebec.
The Erebinae are a subfamily of moths in the family Erebidae erected by William Elford Leach in 1815. Erebine moths are found on all continents except Antarctica, but reach their greatest diversity in the tropics. While the exact number of species belonging to the Erebinae is not known, the subfamily is estimated to include around 10,000 species. Some well-known Erebinae include underwing moths (Catocala) and witch moths (Thermesiini). Many of the species in the subfamily have medium to large wingspans, up to nearly 30 cm in the white witch moth, which has the widest wingspan of all Lepidoptera. Erebine caterpillars feed on a broad range of plants; many species feed on grasses and legumes, and a few are pests of castor bean, sugarcane, rice, as well as pistachios and blackberries.
The San Gabriel Mountains National Monument is a United States National Monument managed by the U.S. Forest Service, which encompasses parts of the Angeles National Forest and the San Bernardino National Forest in California. On October 10, 2014, President Barack Obama used his authority under the Antiquities Act to create the new monument, protecting 346,177 acres of public lands in the San Gabriel Mountains of the Transverse Ranges. The effort to protect the San Gabriel Mountains began more than a century earlier, in 1891 with another U.S. President, Benjamin Harrison, the 23rd president, using a congressional act, to designate and delineate the first federal protection in the United States of forested lands, using the same mountain range name, as the San Gabriel Timberland Reserve. Two earlier California conservationists, Abbot Kinney and John Muir, influenced President Benjamin Harrison.
Aseptis murina is a moth of the family Noctuidae first described by Tomas Mustelin in 2000. It is found in the US in southern California, where it occurs in coastal chaparral, foothills, mountain brush land and oak forest, and in the mountain-desert transition zone from sea level to 2000 meters.
Aseptis ferruginea is a moth of the family Noctuidae first described by Tomas Mustelin in 2000. It is endemic to southern California. All records are from San Diego County, from an area between Boulevard-Manzanita near the Mexican border north to Lake Henshaw at altitudes of 800–1600 meters. The habitat consist of open oak forest, foothill chaparral, and in the mountain-desert transition zone.
Viridiseptis is a monotypic moth genus in the family Noctuidae erected by Tomas Mustelin and Lars G. Crabo in 2015. Its only species, Viridiseptis marina, was first described by Augustus Radcliffe Grote in 1874. It is found throughout coastal California and in south-western Oregon as far north as Douglas County. It is widely distributed in southern California. It is found in many habitats such as coastal chaparral, mountain forest, mountain-desert transition zone, and occasionally in the deserts from sea level to at least 2000 meters.
Hypena californica, known generally as the California cloverworm moth or western bomolocha, is a species of moth in the family Erebidae.
