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Description |
Geographic Range [top]
Range Description: Brachypteryx hyperythra is endemic to the eastern Himalayas, where it is currently known from West Bengal, Sikkim, Assam and Arunachal Pradesh (and perhaps Nagaland), India, north Myanmar, and north-west Yunnan, China. Data suggest it is scarce and local, but this may in part be due to its remote, inaccessible range, which is also likely to include Bhutan, and possibly Nepal and south-east Tibet. There are a number of recent records from northern Myanmar which suggest that the species may be commoner and more widespread than previously thought (J. Eames in litt. 2006, T. Htin Hla in litt. 2006, S. Myers in litt. 2006).
Countries occurrence:
Native:
China; India; Myanmar
Continuing decline in area of occupancy (AOO): Unknown
Extreme fluctuations in area of occupancy (AOO): No
Estimated extent of occurrence (EOO) - km2: 19800
Continuing decline in extent of occurrence (EOO): Unknown
Extreme fluctuations in extent of occurrence (EOO): No
Number of Locations: 11-100
Continuing decline in number of locations: Unknown
Extreme fluctuations in the number of locations: No
Lower elevation limit (metres): 150
Upper elevation limit (metres): 3000
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: The population is estimated to number 10,000-19,999 individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with recorded population density estimates for congeners or close relatives with a similar body size, and the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied. This estimate is equivalent to 6,667-13,333 mature individuals, rounded here to 6,000-15,000 mature individuals.
Trend Justification: The species is suspected to be declining at a slow or moderate rate, owing to deforestation within its known and suspected range.
Current Population Trend: Decreasing
Additional data:
?Number of mature individuals: 6000-15000 ?Continuing decline of mature individuals: Unknown
?Extreme fluctuations: No ?Population severely fragmented: No
?No. of subpopulations: 2-100 ?Continuing decline in subpopulations: Unknown
?Extreme fluctuations in subpopulations: No ?All individuals in one subpopulation: No
?No. of individuals in largest subpopulation: 1-89
Habitat and Ecology [top]
Habitat and Ecology: In May and June (the presumed breeding season) it has been found in dense undergrowth and Arundinaria ("ringal") bamboo in broad-leaved evergreen forest from 1,800-3,000 m. During winter, it frequents dense reeds, thick secondary scrub, forest undergrowth and well-vegetated gulleys, from foothills at 450 m to at least 2,950 m. It has recently been recorded at much lower elevations down to c.150 m, inhabiting tall "elephant type" grass (T. Htin Hla in litt. 2006, S. Myers in litt. 2006). It is probably resident, making seasonal altitudinal movements, although it possibly migrates short distances.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes
Generation Length (years): 4.3
Movement patterns: Not a Migrant
Threats [top]
Major Threat(s): Without a more complete knowledge of its habitat preferences and breeding and wintering ranges, it is difficult to identify particular threats. However, forest loss and degradation owing to logging, smaller-scale cutting for fuelwood, clearance for tea plantations, shifting agriculture and livestock-grazing of forest understorey are all problems within its known range, especially at lower altitudes.
Conservation Actions [top]
Conservation Actions: Conservation Actions Underway
It occurs in Namdapha National Park and the Mehao, Dibang and Kamleng wildlife sanctuaries in north-east India, and in Hponkanrazi and Hukaung Valley wildlife sanctuaries in northern Myanmar.
Conservation Actions Proposed
Study the ecology and threats that may face this species. Identify key areas and important populations, and recommend their integration into protected areas if necessary. Support initiatives seeking to reduce levels of forest destruction and degradation.
Citation: BirdLife International. 2012. Brachypteryx hyperythra. The IUCN Red List of Threatened Species 2012: e.T22708973A38292372. http://dx.doi.org/10.2305/IUCN.UK.2012-1.RLTS.T22708973A38292372.en. Downloaded on 02 February 2016.
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