| San Clemente loggerhead shrike | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Family: | Laniidae |
| Genus: | Lanius |
| Species: | |
| Subspecies: | L. l. mearnsi |
| Trinomial name | |
| Lanius ludovicianus mearnsi Ridgway, 1903 | |
The San Clemente loggerhead shrike (Lanius ludovicianus mearnsi) or San Clemente Island loggerhead shrike is a subspecies of the loggerhead shrike that is endemic to San Clemente Island, California. [3]
The San Clemente loggerhead shrike is a passerine bird of medium size. Around its eyes, it has black feathers, a color which is also found in the tail and on the wings. On its back, it has gray feathers. The underside of the bird is white. It also has patches of white on its wings and tail. [2] The San Clemente loggerhead shrike has the darkest gray feathers compared to its other loggerhead shrike counterparts. [4]
It has been known that the San Catalina loogerhead shrike populution had clustered closely with the San Clemente loggerhead shrikes, so there has been historic gene flow between the two. Still, the San Clemente loggerhead shrike is now its own subspecies. [5]
The San Clemente loggerhead shrike is also called a "butcher bird" since it can take animals similar to its own size such as mammals and reptiles. [6] Loggerhead shrikes have "tomial teeth". These projections in their mandible jab at the spinal cord of their prey to paralyze them. [7] Similar to other loggerhead shrikes, San Clemente loggerhead shrikes reach maturity after a year and live in monogamous pairs. The pair both care for the eggs and young. The clutch size is usually around five eggs. [8]
The San Clemente loggerhead shrike is native to San Clemente Island, a small island off the coast of California, United States. The island is owned by the United States Navy, and is a valuable asset to the Pacific fleet, allowing for ship-to-shore, air-to-ground, and ground-to-ground operational training. Shrikes typically occupy wooded canyons on the west side of the island, and sagebrush-dominant habitat on the eastern escarpment.
Since the 1880s, the San Clemente loggerhead shrike's habitat has been threatened by domestic animals, primarily goats, imported to San Clemente Island. The predation of the shrikes by cats and rats also played a role. [6] By the early 1900s, the bird's population had declined to about 20, but stabilized. The Navy began removing introduced species in 1973. [9] In 1977, the San Clemente loggerhead shrike was listed as endangered by the United States government, with an estimated population of 50. [2] Between 1982 and 1999, the bird's population was measured between 14 and 33 birds, bottoming out in January 1998. [10] [9] The removal of feral goats and sheep was completed in 1993. [9]
In 1996, the Institute for Wildlife Studies conducted video research on the shrike for the Navy. In 1997, they were asked to come up with a strategy to raise the bird's numbers. [10] A captive breeding program was launched in 1992 at a cost of $3 million per year, and new policies were instituted to help the shrike. [11] [12] For example, snipers must aim around bird nests when practicing. [13] Thanks to the program, the bird's population reached 135 (captive and wild) specimens by 2004. [9] In 2009, an estimated 82 pairs were alive; this number decreased to 41 until 2017 due to drought in Southern California. [3]
Shrikes are passerine birds of the family Laniidae. The family is composed of 34 species in two genera.
The great grey shrike is a large and predatory songbird species in the shrike family (Laniidae). It forms a superspecies with its parapatric southern relatives, the Iberian grey shrike, the Chinese grey shrike and the American loggerhead shrike. Males and females are similar in plumage, pearly grey above with a black eye-mask and white underparts.
The red-backed shrike is a carnivorous passerine bird and member of the shrike family, Laniidae. Its breeding range stretches from Western Europe east to central Russia. It is migratory and winters in the eastern areas of tropical Africa and southern Africa.
The lesser grey shrike is a member of the shrike family Laniidae. It breeds in South and Central Europe and western Asia in the summer and migrates to winter quarters in southern Africa in the early autumn, returning in spring. It is a scarce vagrant to western Europe, including Great Britain, usually as a spring or autumn erratic.
The northern shrike is a large songbird species in the shrike family (Laniidae) native to North America and Siberia. Long considered a subspecies of the great grey shrike, it was classified as a distinct species in 2017. Six subspecies are recognised.
The long-tailed shrike or rufous-backed shrike is a member of the bird family Laniidae, the shrikes. They are found widely distributed across Asia and there are variations in plumage across the range. The species ranges across much of Asia, both on the mainland and the eastern archipelagos. The eastern or Himalayan subspecies, L. s. tricolor, is sometimes called the black-headed shrike. Although there are considerable differences in plumage among the subspecies, they all have a long and narrow black tail, have a black mask and forehead, rufous rump and flanks and a small white patch on the shoulder. It is considered to form a superspecies with the grey-backed shrike which breeds on the Tibetan Plateau.
The loggerhead shrike is a passerine bird in the family Laniidae. It is the only member of the shrike family endemic to North America; the related northern shrike occurs north of its range, however it is also found in Siberia. It is nicknamed the butcherbird after its carnivorous tendencies, as it consumes prey such as insects, amphibians, lizards, small mammals and small birds, and some prey end up displayed and stored at a site, for example in a tree. Due to its small size and weak talons, this predatory bird relies on impaling its prey upon thorns or barbed wire for facilitated consumption. The numbers of loggerhead shrike have significantly decreased in recent years, especially in Midwestern, New England and Mid-Atlantic areas.
The Channel Islands are an eight-island archipelago located within the Southern California Bight in the Pacific Ocean, off the coast of California. The four Northern Channel Islands are part of the Transverse Ranges geologic province, and the four Southern Channel Islands are part of the Peninsular Ranges province. Five of the islands are within the Channel Islands National Park, and the waters surrounding these islands make up Channel Islands National Marine Sanctuary. The Nature Conservancy was instrumental in establishing the Channel Islands National Marine Sanctuary.
The island fox is a small fox species that is endemic to six of the eight Channel Islands of California. There are six subspecies, each unique to the island it lives on, reflecting its evolutionary history. They are generally docile, show little fear of humans, and are easily tamed. Island foxes played an important role in the spiritual lives of native Channel Islanders. They have been likely semi-domesticated as pets, used as pelts, or for other functions, like pest control.
The brown shrike is a bird in the shrike family that is found mainly in Asia. It is closely related to the red-backed shrike and isabelline shrike. The genus name, Lanius, is derived from the Latin word for "butcher", and some shrikes are also known as "butcher birds" because of their feeding habits. The specific cristatus is Latin for "crested", used in a broader sense than in English. The common English name "shrike" is from Old English scríc, "shriek", referring to the shrill call.
San Clemente Island is the southernmost of the Channel Islands of California. It is owned and operated by the United States Navy, and is a part of Los Angeles County. It is administered by Naval Base Coronado. It is 21 miles (34 km) long and has 147.13 km2 (56.81 sq mi) of land. The 2018 census estimates 148 military and civilian personnel reside on the island. The city of San Clemente in Orange County, California is named after the island.
The masked shrike is a species of bird in the shrike family, Laniidae. It breeds in southeastern Europe and at the eastern end of the Mediterranean, with a separate population in eastern Iraq and western Iran. It is migratory, wintering mainly in northeast Africa. Although it is a short-range migrant, vagrants have occurred widely elsewhere, including northern and western Europe. It is the smallest member of its genus, long-tailed and with a hooked bill. The male has mainly black upperparts, with white on its crown, forehead and supercilium and large white patches on the shoulders and wings. The throat, neck sides and underparts are white, with orange flanks and breast. The female is a duller version of the male, with brownish black upperparts and a grey or buff tone to the shoulders and underparts. The juvenile has grey-brown upperparts with a paler forehead and barring from the head to rump, barred off-white underparts and brown wings аpart from the white primary patches. The species' calls are short and grating, but the song has melodic warbler-like components.
Lanius, the typical shrikes, are a genus of passerine birds in the shrike family Laniidae. The majority of the family's species are placed in this genus. The genus name, Lanius, is derived from the Latin word for "butcher", and some shrikes are also known as "butcher birds" because of their feeding habits. The common English name "shrike" is from Old English scríc, "shriek", referring to the shrill call.
The tiger shrike or thick-billed shrike is a small passerine bird which belongs to the genus Lanius in the shrike family, Laniidae. It is found in wooded habitats across eastern Asia. It is a shy, often solitary bird which is less conspicuous than most other shrikes. Like other shrikes it is predatory, feeding on small animals. Its nest is built in a tree and three to six eggs are laid.
The southern fiscal or fiscal shrike is a member of the shrike family found through most of southern Africa. It is also sometimes named jackie hangman or butcher bird due to its habit of impaling its prey on acacia thorns to store the food for later consumption. It was previously lumped together with the northern fiscal. Together they were known as the common fiscal.
American Bird Conservancy (ABC) is a non-profit membership organization with the mission of conserving wild birds and their habitats throughout the Americas. Its focus is on threats to birds in the Western Hemisphere – threats which include overuse of pesticides, urban sprawl, habitat destruction, and invasive species.
The San Clemente Island goat is a type of domestic goat derived from feral goats isolated on San Clemente Island, one of the Channel Islands of California.
The mountain shrike or grey-capped shrike, is a species of bird in the family Laniidae. It is endemic to the Philippines.
Bell's sparrow is a medium-sized sparrow of the western United States and northwestern Mexico. It used to be placed in the genus Amphispiza, but recent evidence suggested it be placed in its own genus.
The wildlife of the Channel Islands of California is wide and diverse, including many endemic species. While the land wildlife is slightly limited, there being only one large, naturally predatory, and native mammal, the small island fox, marine life can include anything from kelp forests to great white sharks.
