| 2009 IUCN Red List Category (as evaluated by BirdLife International - the official Red List Authority for birds for IUCN): Near Threatened Justification This species is thought to have a moderately small and declining range and consequently it is considered Near Threatened.
Family/Sub-family Muscicapidae Species name author (Temminck, 1835) Taxonomic source(s) Sibley and Monroe (1990, 1993) Identification |
Population estimate | Population trend | Range estimate (breeding/resident) | Country endemic? |
80,000 - 90,000 | unset | - | Yes |
Range & population Erithacus komadori is the most abundant of the endemic birds restricted to the Nansei Shoto archipelago, Japan. Three subspecies are currently recognised: subrufa which occurs on the islands of Ishigaki, Iriomote and Yonaguni (where it is poorly known and may be of doubtful validity); namiyei is endemic to the northern part of Okinawa Island; and komadori which inhabits the southern islands of of Kagoshima and Okinawa. The population is considered to be around 80,000-90,000 individuals3. It remains common on Amami-oshima, Toku-noshima and the northern part of Okinawa, but steep declines have been reported from some islands.
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Ecology: It inhabits dense undergrowth in damp areas within riparian broad-leaved evergreen forest and nests in crevices or among the roots of trees from May to August. It occurs from 100-600 m in different parts of its range. It is a partial migrant and in the winter many birds relocate to the southern islands of the archipelago1.
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Threats Threats include predation by introduced mongooses (Okinawa) and weasels (Nakanoshima) and habitat loss resulting from commercial logging.
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| Conservation measures underway It is considered Vulnerable in the most recent national Red Data Book for Japan2. It makes use of artificial nest boxes that have been erected.
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| Conservation measures proposed Monitor the species in order to detect populations declines. If declines are evident consider appropriate management actions including predator control and reducing commercial logging. Calculate its range size and the area of suitable habitat. Protect areas of suitable habitat.
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References Collar (2005). 1. Brazil (1991). 2. Ministry of the Environment (2002). 3. S. Chan in litt. (2003).
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Text account compilers Phil Benstead (BirdLife International), Jeremy Bird (BirdLife International) |
Contributors Simba Chan (Wild Bird Society of Japan) |
IUCN Red List evaluators Jeremy Bird (BirdLife International), Stuart Butchart (BirdLife International) |
| Recommended citation BirdLife International (2009) Species factsheet: Erithacus komadori. Downloaded from http://www.birdlife.org on 10/2/2010 |
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 |
