| 词条 | Black giant squirrel | |||||||||||||||||||||||||||||||||
| 释义 |
| name = Malayan Black giant squirrel | image = Ratufa bicolor 6237.jpg | status = NT | status_system = IUCN3.1 | status_ref = [1]] | genus = Ratufa | species = bicolor | authority = (Sparrman, 1778) | subdivision_ranks = Subspecies | subdivision =
| synonyms = Tennentii, source: Layard, in Blyth, 1849 | range_map = Ratufa bicolor range map.svg | range_map_caption = Black giant squirrel range }} The black giant squirrel or Malayan giant squirrel (Ratufa bicolor) is a large tree squirrel in the genus Ratufa native to the Indomalayan zootope. It is found in forests from northern Bangladesh, northeast India, eastern Nepal, Bhutan, southern China, Myanmar, Laos, Thailand, Malaysia, Cambodia, Vietnam, and western Indonesia. DescriptionHead and body length varies from {{convert|35|to|58|cm|in}} in length, and the tail is up to {{convert|60|cm|in}} long, with an overall length of up to {{convert|118|cm|in}}. The back, ears and bushy tail are deep brown to black with a lighter buff-colored belly. HabitatRatufa bicolor's range includes a variety of bioregions that all share the commonality of being forested. It ranges in elevation from sea level up to at least {{convert|1400|m|ft}}, in some of the most rugged land in the world. However, in recent decades, R. bicolor's habitat has been steadily encroached upon by human settlement, timber harvesting and agriculture, which along with overhunting by human predation in parts of its range, has resulted in a total loss of up to 30% of the population in the past ten years.[1] However, in some places this species is protected from hunting by law or tradition.[1]In South Asia R. bicolor dwells among tropical and subtropical coniferous and broadleaf forests.[1] In Southeast Asia R. bicolor lives in tropical broadleaf evergreen and semi-evergreen forests, but is rarely seen in coniferous forests.[1] In the tropical rainforest of the Malay Peninsula and Indonesia, R. bicolor is not as abundant as elsewhere in its range, which is probably due to competition from other arboreal species (especially primates) for food in the upper forest canopy.[1] Among the better places to sight the black giant squirrel is the Kaziranga National Park in the state of Assam, India.[3] BehaviorR. bicolor is diurnal and arboreal, but sometimes climbs down from the forest canopy to feed on the ground.[1] The black giant squirrel rarely enters plantations or settlements, preferring the wild forest.[1]Its diet consists of seeds, pine cones, fruits, and leaves.[1] It is primarily solitary, and has a litter of from 1 to 2 young, which it raises in a drey (or nest), often located within a hollow space of a tree.[1] TaxonomyFurther study is required to determine whether Ratufa bicolor actually represents several similar species.[1] The table below lists the ten recognized subspecies of Ratufa bicolor, along with any synonyms associated with each subspecies:[2]
GalleryReferences1. ^1 2 3 4 5 6 7 8 9 10 {{IUCN2008|assessor=Walston, J.|assessor2=Duckworth, J. W.|assessor3=Molur, S.|year=2008|id=19377|title=Ratufa bicolor|downloaded=6 January 2009}} 2. ^1 {{cite book|last1=Thorington|first1=R.W., Jr.|last2=Hoffmann|first2=R.S.|year=2005|pages=754–818|editor1-last=Wilson|editor1-first=D.E.|editor2-last=Reeder|editor2-first=D.M|url=http://www.bucknell.edu/msw3|chapter=Ratufa bicolor|chapterurl=http://www.bucknell.edu/msw3/browse.asp?id=12400014|title=Mammal Species of the World: a taxonomic and geographic reference|edition=3rd|publisher=The Johns Hopkins University Press|isbn=0-8018-8221-4|oclc=26158608}} 3. ^{{cite book|last1=Menon|first1=Vivek|title=Mammals of India|series=Princeton field guides|year=2009|origyear=First published 2003|publisher=Princeton University Press|location=Princeton, N.J.|isbn=978-0-691-14067-4|oclc=276340775|quote=Originally published as: Menon, Vivek (ed.), et al. A field guide to Indian mammals (2003)}} Bibliography
External links
17 : Ratufa|Rodents of India|Rodents of Bangladesh|Mammals of Nepal|Mammals of Bhutan|Rodents of China|Rodents of Myanmar|Rodents of Laos|Rodents of Thailand|Rodents of Cambodia|Rodents of Vietnam|Rodents of Indonesia|Rodents of Malaysia|Mammals described in 1778|Articles containing video clips|Taxonomy articles created by Polbot|Taxa named by Anders Sparrman |
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