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Taiwan Partridge Arborophila crudigularis

Justification
This species is classified as Near Threatened because it is likely to have a small population, which is probably undergoing a decline owing to habitat loss, although there is little information available on its sub-population structure. If surveys showed it to have a smaller population than currently thought, or that it had a particular sub-population structure, it might qualify for uplisting to a higher threat category.

Taxonomic source(s)
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

Distribution and population
Arborophila crudigularis is confined to the mountains of central Taiwan (China), where it occurs in broadleaved forest at 700-2,300 m. It was formerly widespread but there have been no surveys and few records in recent years, and its population could now be below 10,000 individuals. Although it is probably secure inside protected areas, it is likely to be declining elsewhere.

Population justification
The global population size has been estimated at c.<10,000 individuals (del Hoyo et al. 1994), and so it is placed in the band 2,500-9,999 individuals. This equates to 1,667-6,666 mature individuals, rounded here to 1,500-7,000 mature individuals. Brazil (2009) estimates the population size in Taiwan at c.100-10,000 breeding pairs.

Trend justification
There are no data on population trends; however, habitat loss is suspected to be causing an on-going decline in this species's population.

Ecology
It favours thickets and damp undergrowth in broadleaved evergreen forest, principally at 1,500-2,000 m, but ranges from 700 to 3,000 m.

Threats
It is suspected to be declining because of forest loss for timber production and conversion to agricultural land, and possibly also because of the use of pesticides.

Conservation Actions Underway
Some 11% of Taiwan is protected, in six national parks and in nature reserves and wildlife sanctuaries, and the species is well represented in these protected areas. Conservation Actions Proposed
Survey to assess its population size. Monitor populations both inside and outside protected areas. Enforce the protection afforded to the species by the national parks.

References
BirdLife International. 2001. Threatened birds of Asia: the BirdLife International Red Data Book. BirdLife International, Cambridge, U.K.

Brazil, M. 2009. Birds of East Asia: eastern China, Taiwan, Korea, Japan, eastern Russia. Christopher Helm, London.

del Hoyo, J.; Elliott, A.; Sargatal, J. 1994. Handbook of the Birds of the World, vol. 2: New World Vultures to Guineafowl. Lynx Edicions, Barcelona, Spain.

Further web sources of information
Detailed species accounts from the Threatened birds of Asia: the BirdLife International Red Data Book (BirdLife International 2001).

Text account compilers
Taylor, J., Symes, A., Benstead, P., Mahood, S.

IUCN Red List evaluators
Butchart, S., Taylor, J.

Recommended citation
BirdLife International (2014) Species factsheet: Arborophila crudigularis. Downloaded from http://www.birdlife.org on 20/04/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/04/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Additional resources for this species

ARKive species - Taiwan partridge (Arborophila crudigularis) 0

Key facts
Current IUCN Red List category Near Threatened
Family Phasianidae (Grouse, pheasants and partridges)
Species name author (Swinhoe, 1864)
Population size 1500-7000 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 12,900 km2
Country endemic? Yes
Links to further information
- Additional Information on this species