Thomas's pika | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Lagomorpha |
Family: | Ochotonidae |
Genus: | Ochotona |
Species: | O. thomasi |
Binomial name | |
Ochotona thomasi Argyropulo, 1948 | |
Thomas's pika range | |
Synonyms [2] | |
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Thomas's pika (Ochotona thomasi), also known as the Thomas-pika, [3] is a species of small mammal in the pika family, Ochotonidae. The fur on its upper body is reddish brown in summer, and mouse grey in winter. It is a generalist herbivore threatened by habitat loss, being found on isolated peaks of the eastern Qilian Mountains in Qinghai, Gansu, and northwestern Sichuan, in China. The International Union for Conservation of Nature Red List of Endangered Species assessed the animal as insufficiently known in 1994, as near threatened in 1996, and as a species of least concern in 2008.
Thomas's pika is a monotypic species (having no subspecies), [4] that was first described in 1948 by the Russian zoologist A. I. Argyropulo, in the journal Trudy Zoologicheskogo Instituta. [2] He named it after the British mammalogist Michael Rogers Oldfield Thomas. [5] Thomas's pika is similar to the Gansu pika ( Ochotona cansus ), with a similar greatest skull length, but can be distinguished by its smaller skull and cheek bone width. In 1974, Feng and Kao synonymised O. t. cilanica Bannikov 1960 [6] with Ochotona thomasi. [4] According to Mammal Species of the World , O. ciliana Bannikov, 1940 is currently its only synonym. [2]
Thomas's pika measures 10.5 to 16.5 cm (4.1 to 6.5 in) in length, and weighs 45 to 110 g (1.6 to 3.9 oz). The fragile skull is broader anteriorly, and smaller, flatter, and narrower than other pika species. The greatest skull length is 3.3 to 3.7 cm (1.3 to 1.5 in). The anterior palatine foramen (funnel-shaped opening in the bony plate of the skull, located in the roof of the mouth, immediately behind the incisor teeth where blood vessels and nerves pass) and the palatal foramen are attached, and there is no oval foramen above the frontal bone. [7] The cheek bones are 3.36 to 3.55 cm (1.32 to 1.40 in) wide, [4] and the ears measure 1.7 to 2.2 cm (0.67 to 0.87 in) in length. It has elongated, convex auditory bullae. The summer dorsal pelage is reddish brown, and the underparts are yellow tinged or light white in colour. The winter dorsal pelage is mouse grey in colour, and the hairs have noticeable black tips. The hindfeet are 2.2 to 2.9 cm (0.87 to 1.14 in) long. [7]
Endemic to China, Thomas's pika is rare, [1] and no intensive population studies have been conducted. [8] It is found on the secluded mountains of the eastern Qilian Mountain range in Qinghai, Gansu, and northwestern Sichuan. [1]
It inhabits meadows and isolated hilly, shrubby forests of Caragana jubata , the shrubby cinquefoil ( Dasiphora fruticosa ), Rhododendron , and the willow species ( Salix ), [7] at elevations between 3,400 metres (11,200 ft) and 4,020 metres (13,190 ft) from sea level. [1]
Thomas's pika is sympatric (existing in the same geographic area and thus frequently encountering) with the Gansu pika [2] which also overlaps in part of its range with the Moupin pika ( Ochotona thibetana ) but there is no overlap in the ranges of Thomas's and Moupin pikas. [4]
Thomas's pika is a diurnal [1] burrowing species. [4] It is a generalist herbivore, and may live in small family groups. [1] Although its ecology is not well known, it is thought to be similar to that of the Gansu pika. [7] Details about its behaviour and reproduction are also unknown. [4]
In 1994, Thomas's pika was assessed as insufficiently known on the IUCN Red List of Endangered Species. In 1996 it was warranted a near-threatened status, [1] and it nearly even met the vulnerable criteria (A2c + 3c) [7] by both the IUCN and the Red List of China's Vertebrates due to a declining population of over 30% in the last ten years, in the projected ten years, or in three generations, determined based on a decreasing extant of occurrence, area of occupancy, or quality of habitat. [9] It was re-assessed by IUCN in 2008 and rated as a species of least concern. This is because, although very little is known about its status, it is a widespread species. The current state of its population trend is unclear. It may be affected by killing due to pest control measures in its range although its effects to the species is unknown. There are no conservation measures to protect Thomas's pika. [1] [8]
A pika is a small, mountain-dwelling mammal native to Asia and North America. With short limbs, a very round body, an even coat of fur, and no external tail, they resemble their close relative, the rabbit, but with short, rounded ears. The large-eared pika of the Himalayas and nearby mountains lives at elevations of more than 6,000 m (20,000 ft).
The alpine pika is a species of small mammal in the pika family, Ochotonidae. The summer pelage of different subspecies varies drastically but, in general, it is dark or cinnamon brown, turning to grey with a yellowish tinge during the winter. The alpine pika is found in western Mongolia, eastern Kazakhstan, and Russia, as well as in China, in very cold, mountainous regions. It is a generalist herbivore, and mainly forages on mosses, tree branches, pine nuts, and plant stems. It can emit three series of different vocalizations: a long call, a short call, and an alarm call. It is rated as a species of least concern on the IUCN Red List of Endangered Species.
The Helan Shan pika or silver pika is a species of mammal in the pika family, Ochotonidae. It is endemic to China where it is found in a small region of the Helan Mountains. It is listed as "Endangered" in the IUCN Red List of Threatened Species as of 2016.
The Gansu pika or gray pika is a species of mammal in the pika family, Ochotonidae. It is endemic to China.
The Chinese red pika is a species of mammal in the family Ochotonidae. Typical of a pika it has short limbs, a small tail and round ears. Specific to the Chinese red pika has distinctive red color in its pelt. The Chinese pika typically lives in rocky terrain at altitudes between 600 and 1200 meters. and is endemic to the East Qinghai, West Gansu and Northern Sichuan provinces of China and Eastern Tibet.
Forrest's pika is a species of mammal in the pika family, Ochotonidae. It is found in Bhutan, China, India, and Myanmar. The summer dorsal pelage and ventral pelage are dark rufous or blackish brown, and the winter dorsal pelage is a grayish brown, slightly lighter in tone than the ventral pelage. It is a generalist herbivore. It was assessed by the IUCN Red List of Endangered Species as insufficiently known in 1994, as near threatened in 1996, and re-assessed in 2008 as a species of least concern.
The Gaoligong pika is a species of mammal in the family Ochotonidae. It is endemic to China. Many of the general physical characteristics of the pika species, are shared by Gaoligong pikas. However, the Gaoligong pika is specifically characterized by unique physical characteristics, including a red-brown colored crown around the neck and black behind the ears. They can produce one litter per year and can live up to three years. Their behavior is currently undetermined due to limited information available about the species. This is due to the inaccessibility of their habitat.
Glover's pika is a species of mammal in the family Ochotonidae. It was first described in 1922, by Michael Rogers Oldfield Thomas. The summer dorsal pelage is grayish rufous, grayish brown, or tea brown in colour. The winter pelage is similar to the summer pelage, but is lighter in tone. Endemic to China, it is found in high altitudes of northeastern Tibet, southwestern Qinghai, western Sichuan, and northwestern Yunnan. It is a generalist herbivore, and is known to construct haypiles. It is rated as a species of least concern by the International Union for Conservation of Nature. It is also regionally red listed as least concern in China.
The Himalayan pika is a species of small mammal in the pika family (Ochotonidae). It is found at high altitudes in remote areas of Ladakh, Uttarakhand and possibly also in Nepal &Tibet. The IUCN has listed this species as being of "least concern".
The Ili pika is a species of mammal in the family Ochotonidae, endemic to northwest China. After its discovery in 1983, it was studied for a decade. Increased temperatures, likely from global warming, and increased grazing pressure may have caused the rapid decline in population. According to IUCN last assessed in 2018, the Ili pika is now considered an endangered species, with approximately fewer than 1,000 left.
Koslov's pika or Kozlov's pika is a species of mammal in the family Ochotonidae. It is endemic to China. Its natural habitat is tundra. It is threatened by habitat loss. Kozlov's pika are herbivores, they are known as "ecosystem engineers" as they're known to promote diversity of different plants species. Specifically, this species of Pikas has been enlisted as "endangered" in China. Kozlov Pikas are estimated to be within the Northern edge of the Arkatag Range in China.
The Ladak pika, also known as the Ladakh pika, is a species of mammal in the family Ochotonidae found in China, India, and Pakistan. Prior to identification as a separate species, specimens were thought to be of the plateau pika. Named for the Ladakh region, they are commonly found in valleys of the mountain ranges spanning from Pakistan through India to China at an elevation between 4,300 and 5,450 m and are herbivores.
The large-eared pika is a species of small mammal in the family Ochotonidae. It is found in mountainous regions of Afghanistan, Tibet, Bhutan, India, Kazakhstan, Kyrgyzstan, Nepal, Pakistan and Tajikistan where it nests among boulders and scree.
The Muli pika is a species of mammal in the family Ochotonidae. The species' natural habitat is the palearctic, specifically the Yunnan Plateau subtropical evergreen forest ecoregion of the Sichuan province in China. Localized to the region’s general altitude of 3600 meters, the Muli pika is rarely encountered. The small population size and restricted habitat of the Muli pika likely threaten the species. The Muli pika is considered extant.
The Turkestani red pika is a species of mammal in the family Ochotonidae. The summer fur at its back is bright rufous and the ventral fur is white or ochraceous. The winter dorsal fur is pale brown and the ventral fur is white or light ochraceous in colour. It is found in the mountains of western Xinjiang in China, and sporadically also in the central Asian mountains in Kazakhstan, Kyrgyzstan, Tajikistan, and Uzbekistan. The female has a low fertility rate, and gives birth to offspring during the breeding season from spring to summer. She generally produces two litters each year, with two to six young. It is rated as a species of least concern on the International Union for Conservation of Nature Red List of Endangered Species, but it is considered to be near-threatened within the China part of its range.
The Moupin pika, also known as Moupin-pika, and Manipuri pika, is a species of mammal in the pika family, Ochotonidae. It has many subspecies, some of which may be distinct species. Its summer pelage is dark russet-brown with some light spots on the dorsal side, and ochraceous buff tinged on the belly. In winter it is lighter, with buff to dull brown dorsal pelage. A generalist herbivore, it is found in the mountains of the eastern Tibetan Plateau in China, Bhutan, India (Sikkim), and northern Myanmar. Both the International Union for Conservation of Nature Red List of Endangered Species and the Red List of China's Vertebrates classify it as a species of least concern; although one subspecies may be endangered.
The black pika or silver pika is a species of mammal in the family Ochotonidae. It was thought to be common to the Yunnan Province of China where it was first discovered in 2000, it is only known from four specimens. The validity of the species has been questioned, with some studies suggesting that the known specimens represent melanistic individuals of Forrest's pika.
The Tsing-ling pika is a species of pika endemic to the mountains in Central China. It inhabits mountainous forests and shrublands. It is a poorly known species.
There is very little reported data on this specific species so the data below is taken from general pika information.