Miocene to recent, 16.4–0Ma
|American pika (Ochotona princeps) in Sequoia National Park|
(Lepus dauuricus Pallas, 1776)
|Pika Ochotona sp. fossil distribution. Extinct pikas and Ochotona indet. are red, steppe pika O. pusilla blue, northern pika O. hyperborea green, other extant pikas black.[n 1]|
A pika (// PY-kə; archaically spelled pica) is a small mammal, with short limbs, rounded ears, and no external tail. The name 'pika' is used for any member of the Ochotonidae, a family within the order of lagomorphs, which also includes the Leporidae (rabbits and hares). One genus, Ochotona, is recognised within the family, and it includes 30 species. It is also known as the "whistling hare" due to its high-pitched alarm call when diving into its burrow. In the USA, the pika is colloquially called a "coney". The name "pika" appears to be derived from the Tungus piika.
Pikas are native to cold climates, mostly in Asia, North America, and parts of Eastern Europe. Most species live on rocky mountain sides, where numerous crevices in which to shelter occur, although some pika also construct crude burrows. A few burrowing species are native to open steppe land. In the mountains of Eurasia, pikas often share their burrows with snowfinches, which build their nests there.
Pikas are small mammals, with short limbs and rounded ears. They are about 15 to 23 centimetres (5.9 to 9.1 in) in body length and weigh between 120 and 350 grams (4.2 and 12.3 oz), depending on species. Like rabbits, after eating they initially produce soft green feces, which they eat again to take in further nutrition, before producing the final, solid, fecal pellets. Some pikas, such as the collared pika, have been known to store dead birds in their burrows, for food during winter.
These animals are herbivores, and feed on a wide variety of plant matter, including forbs, grasses, sedges, shrub twigs, moss, and lichen. As with other lagomorphs, pikas have gnawing incisors and no canines, although they have fewer molars than rabbits, giving them a dental formula of: 188.8.131.52
Rock-dwelling pikas have small litters of fewer than five young, while the burrowing species tend to give birth to more young, and to breed more frequently, possibly due to a greater availability of resources in their native habitats. The young are born after a gestation period of between 25 and 30 days.
Pikas are diurnal or crepuscular, with higher-elevation species generally being more active during the daytime. They show their peak activity just before the winter season. Pikas do not hibernate, so they generally spend time during the summer collecting and storing food they will eat over the winter. Each rock-dwelling pika stores its own "haypile" of dried vegetation, while burrowing species often share food stores with their burrow mates. Haying behavior is more prominent at higher elevations. Many of the vocalizations and social behaviors that pikas exhibit are related to haypile defense.
Eurasian pikas commonly live in family groups and share duties of gathering food and keeping watch. Some species are territorial. North American pikas (O. princeps and O. collaris) are asocial, leading solitary lives outside the breeding season.
There are 30 species listed.
- Order Lagomorpha
- Family Ochotonidae: pikas
- Genus Ochotona
- Subgenus Pika: northern pikas
- Subgenus Ochotona: shrub-steppe pikas
- Gansu pika/Gray pika, Ochotona cansus
- Plateau pika/Black-lipped pika, Ochotona curzoniae
- Daurian pika, Ochotona dauurica
- Tsing-ling pika, Ochotona huangensis
- Nubra pika, Ochotona nubrica
- Steppe pika, Ochotona pusilla
- Afghan pika, Ochotona rufescens
- Moupin pika, Ochotona thibetana
- Thomas's pika, Ochotona thomasi
- Subgenus Conothoa: mountain pikas
- Chinese red pika, Ochotona erythrotis
- Forrest's pika, Ochotona forresti
- Gaoligong pika, Ochotona gaoligongensis
- Glover's pika, Ochotona gloveri
- Himalayan pika, Ochotona himalayana
- Ili pika, Ochotona iliensis
- Koslov's pika, Ochotona koslowi
- Ladak pika, Ochotona ladacensis
- Large-eared pika, Ochotona macrotis
- Muli pika, Ochotona muliensis
- Black pika, Ochotona nigritia
- Royle's pika, Ochotona roylei
- Turkestan red pika, Ochotona rutila
- Genus Ochotona
- Family Ochotonidae: pikas
There are many known fossil forms of Ochotona described in the literature, from the Miocene epoch to the early Holocene (extinct species) and present (16.4-0 Ma). They lived in Europe, Asia, and North America. Note that some species listed below are common for Eurasia and North America (O. gromovi, O. tologoica, O. zazhigini and probably O. whartoni).
- large forms
- †Ochotona chowmincheni (China: Baode area, late Miocene)
- †Ochotona gromovi (Asia, Pliocene, see also North America)
- †Ochotona gudrunae (China: Shanxi, early Pleistocene)
- †Ochotona guizhongensis (Tibet, late Miocene)
- †Ochotona lagreli (China: Inner Mongolia, late Miocene to late Pliocene)
- †Ochotona magna (China, early Pleistocene)
- †Ochotona tologoica (Transbaikalia, Pliocene, see also North America)
- †Ochotona transcaucasica (Transcaucasia: eastern Georgia and Azerbaijan, Transbaikal and probably southern Europe, early to late Pleistocene)
- †Ochotona ursui (Romania, Pliocene)
- †Ochotona zasuchini (Transbaikalia, Pleistocene)
- †Ochotona zazhigini (Asia, Pliocene, see also North America)
- †Ochotona zhangi (China, Pleistocene)
- medium-sized forms
- †Ochotona agadjianiani (Asia, Pliocene)
- †Ochotona antiqua (Moldavia, Ukraine and the Russian Plain, Caucasus, and probably Rhodes, late Miocene to Pliocene)
- †Ochotona azerica (Transcaucasia: Azerbaijan, middle Pliocene)
- †Ochotona lingtaica (Asia, Pliocene)
- †Ochotona dodogolica (Asia: western Transbaikalia, Pleistocene)
- †Ochotona nihewanica (China: Hebei, early Pleistocene)
- †Ochotona plicodenta (Asia, Pliocene)
- †Ochotona polonica (Europe: Poland, Germany, France, Pliocene)
- small-sized forms
- †Ochotona bazarovi (Asia, upper Pliocene)
- †Ochotona dehmi (Germany: Schernfeld, Pleistocene)
- †Ochotona filippovi (Siberia, Pleistocene)
- †Ochotona gracilis (Asia, Pliocene)
- †Ochotona horaceki (Slovakia: Honce, Pleistocene)
- †Ochotona minor (China, late Miocene)
- †Ochotona sibirica (Asia, Pliocene)
- †Ochotona valerotae (France: Valerots site, Pleistocene)
- †Ochotona youngi (Asia, Pliocene)
- other examples
- †Ochotona agadzhaniani (Transcaucasia: Armenia, Pliocene)
- †Ochotona alaica (Asia: Kyrgyzstan, Pleistocene)
- †Ochotona (Proochotona) eximia (Moldova, Ukraine, Russia, Kazakhstan, Miocene to Pliocene)
- †Ochotona (Proochotona) gigas (Ukraine, Pliocene)
- †Ochotona gureevi (Transbaikalia, middle Pliocene)
- †Ochotona hengduanshanensis (China, Pleistocene)
- †Ochotona intermedia (Asia, Pliocene)
- †Ochotona (Proochotona) kalfaense (Europe: Moldova, Miocene)
- †Ochotona (Proochotona) kirgisica (Asia: Kyrgyzstan, Pliocene)
- †Ochotona kormosi (Hungary, Pleistocene)
- †Ochotona (Proochotona) kurdjukovi (Asia: Kyrgyzstan, Pliocene)
- †Ochotona largerli (Georgia, Pleistocene)
- †Ochotona lazari (Ukraine, Pleistocene)
- †Ochotona mediterranensis (Turkey, Pliocene)
- †Ochotona ozansoyi (Turkey, Miocene)
- †Ochotona pseudopusilla (Ukraine and Russian Plain, Pleistocene)
- †Ochotona spelaeus (Ukraine, late Pleistocene)
- †Ochotona tedfordi (China: Yushe Basin, late Miocene)
- †Ochotona cf. whartoni (Irkutsk Oblast and Yakutia, Pleistocene, see also North America)
- †Ochotona zabiensis (southern Poland, early Pleistocene)
- †Ochotona sp. (Greece: Maritsa, Pliocene)
- †Ochotona sp. (Hungary: Ostramos, Pleistocene)
- †Ochotona sp. (Siberia, Pleistocene)
- †Ochotona sp. (Yakutia, Pleistocene)
- large forms
- North America
- †Ochotona gromovi (USA: Colorado, Pliocene, see also Eurasia)
- †Ochotona spanglei (USA, late Miocene or early Pliocene)[n 2]
- †Ochotona tologoica (USA: Colorado, Pliocene, see also Eurasia)
- †Ochotona whartoni (giant pika, USA, Canada, Pleistocene to early Holocene, see also Eurasia)[n 3]
- †Ochotona wheatleyi (USA: Alaska, Pliocene, late Pleistocene)
- †Ochotona zazhigini (USA: Colorado, Pleistocene, see also Eurasia)
- extinct small pikas similar to the O. pusilla group (Pleistocene)
Paleontologists have also described multiple forms of pika not referred to specific species (Ochotona indet.) or not certainly identified (O. cf. antiqua, O. cf. cansus, O. cf. daurica, O. cf. eximia, O. cf. gromovi, O. cf. intermedia, O. cf. koslowi, O. cf. lagrelii, O. cf. nihewanica). The status of Ochotona (Proochotona) kirgisica and O. spelaeus is uncertain.
The North American species migrated from Eurasia. They invaded the New World twice:
- Ochotona spanglei during the latest Miocene or early Pliocene, followed by an approximately three-million-year-long gap in the known North American pikas record.
- Ochotona whartoni (giant pika) and small pikas via the Bering Land Bridge during the earliest Pleistocene.
Ochotona cf. whartoni and small pikas of the O. pusilla group are also known from Siberia. The extant, endemic North American species appeared in the Pleistocene. It has been suggested that the North American collared pika (O. collaris) and American pika (O. princeps) descended from the same ancestor as the steppe pika (O. pusilla).
The range of Ochotona was larger in the past, with both extinct and extant species inhabiting western Europe and eastern North America, areas that are currently free of pikas. Pleistocene fossils of the extant steppe pika Ochotona pusilla currently native to Asia have been found also in many countries of Europe from the United Kingdom to Russia and from Italy to Poland, and the Asiatic extant northern pika Ochotona hyperborea in one location in the middle Pleistocene United States.
Other genera of ochotonids (currently living only Ochotonidae) include except Ochotona (pika) extinct †Albertona, †Alloptox, †Amphilagus, †Australagomys, †Austrolagomys, †Bellatona, †Bellatonoides, †Bohlinotona, †Cuyamalagus, †Desmatolagus, †Eurolagus, †Gripholagomys, †Gymnesicolagus, †Hesperolagomys, †Heterolagus, †Kenyalagomys, †Lagopsis, †Marcuinomys, †Ochotonoides, †Ochotonoma, †Oklahomalagus, †Oreolagus, †Paludotona, †Piezodus, †Plicalagus, †Pliolagomys, †Prolagus, †Proochotona (syn. Ochotona), †Pseudobellatona, †Ptychoprolagus, †Russellagus, †Sinolagomys and †Titanomys. The earliest one is Desmatolagus (middle Eocene to Miocene, 42.5-14.8 Ma), usually included in Ochotonidae, sometimes in Leporidae or in neither ochotonid nor leporid stem-lagomorphs.
Ochotonids appeared in Asia between the late Eocene and the early Oligocene, and continued to develop along with increased distribution of C3 grasses in previously forest dominated areas under the "climatic optimum" from the late Oligocene to middle Miocene. They thrived in Eurasia, North America and even Africa. The peak of their diversity occurred during the period from the early Miocene to middle Miocene, most of them became extinct during the transition from the Miocene to Pliocene, what was accompanied by diversity increase in the leporids. It has been proposed, that this switch between ochotonids and larger leporids was caused by linked to global cooling expansion of C4 plants (particularly in the Poaceae) in the late Miocene, since extant pikas reveal a strong preference for C3 plants (Asteraceae, Rosaceae and Fabaceae, many of them C3). Replacement of large area of forest on the earth that time by open grassland first started probably in North America is called sometimes "nature's green revolution".
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Translated by Will Downs Department of Geology Bilby Research Center Northern Arizona University October, 1990
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3rd INTERNATIONAL MAMMOTH CONFERENCE, 2003: PROGRAM AND ABSTRACTS, Edited by John E. Storer
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document type Dissertation full text
- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press.
- The coordinates of additional fossils not listed in the xls file attached to Ge and all paper were taken from the Paleobiology Database.[pdb 1][pdb 2][pdb 3][pdb 4][pdb 5][pdb 6][pdb 7][pdb 8][pdb 9][pdb 10][pdb 11][pdb 12][pdb 13][pdb 14][pdb 15][pdb 16][pdb 17][pdb 18][pdb 19][pdb 20][pdb 21][pdb 22][pdb 23]
- Ochotona spanglei in the Paleobiology Database.[pdb 24][pdb 25][pdb 26]
- Ochotona whartoni in the Paleobiology Database.[pdb 27][pdb 15][pdb 11][pdb 12][pdb 28][pdb 29][pdb 30]
Additional references of the Paleobiology Database
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- Additional contributors to utilized records of Paleobiology Database (authorizers supplying these records) include John Alroy, Anna Behrensmeyer, Will Clyde, Alan Turner, Mark Uhen.
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- Storer, J. E. (2004). "A Middle Pleistocene (late Irvingtonian) mammalian fauna from Thistle Creek, Klondike Goldfields region of Yukon Territory, Canada". Paludicola 4 (4): 137–150. [J. Alroy/J. Alroy]
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- Additional contributors to utilized records of Paleobiology Database (authorizers supplying these records) include John Alroy, Jonathan Marcot.
|Wikimedia Commons has media related to Ochotona.|
- The trek of the pika, by Michael Morris, Parks Canada, Mount Revelstoke and Glacier National Parks. (includes sound file)