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Description |
Geographic Range [top]
Range Description: Aegithina viridissima is restricted to the Sundaic lowlands, where it occurs from south Tenasserim, Myanmar, peninsular Thailand, Singapore, Sabah, Sarawak and Peninsular Malaysia, Kalimantan (including Natuna Islands) and Sumatra (including offshore islands), Indonesia and Brunei (BirdLife International 2001). It is locally fairly common to common within this range.
Countries occurrence:
Native:
Brunei Darussalam; Indonesia; Malaysia; Myanmar; Thailand
Regionally extinct:
Singapore
Additional data:
? Continuing decline in area of occupancy (AOO): Yes
? Extreme fluctuations in area of occupancy (AOO): No ? Estimated extent of occurrence (EOO) - km2: 3780000
? Continuing decline in extent of occurrence (EOO): Yes ? Extreme fluctuations in extent of occurrence (EOO): No
? Continuing decline in number of locations: Unknown
? Extreme fluctuations in the number of locations: No
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: The global population size has not been quantified, but the species is described as common in areas of continuous forest canopy (del Hoyo et al. 2005).
Trend Justification: A moderately rapid population decline is likely to be occurring, owing to the widespread and rapid loss of forest habitats occurring throughout the Sundaic region. The rate of population decline is not thought to be more rapid as this species is tolerant of secondary and logged habitats.
Current Population Trend: Decreasing
Additional data:
? Number of mature individuals: Unknown ? Continuing decline of mature individuals: Yes
? Extreme fluctuations: No ? Population severely fragmented: No
? Continuing decline in subpopulations: Unknown
? Extreme fluctuations in subpopulations: No ? All individuals in one subpopulation: No
Habitat and Ecology [top]
Habitat and Ecology: This species occurs in mangroves and primary, tall secondary and logged forests, up to 825 m.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes
Generation Length (years): 4.8
Movement patterns: Not a Migrant
Threats [top]
Major Threat(s): Rates of forest loss in the Sundaic lowlands have been extremely rapid, owing partly to the escalation of illegal logging and land conversion, with deliberate targeting of all remaining stands of valuable timber including those inside protected areas. Forest fires have also had a damaging effect (particularly in 1997-1998). The magnitude of these threats may be allayed by this speciess tolerance of logged and secondary forests.
Conservation Actions [top]
Conservation Actions: Conservation Actions Underway
No targeted conservation actions are known for this species, although it occurs in a number of protected areas.
Conservation Actions Proposed
Conduct repeated surveys in areas within and surrounding the speciess range to measure rates of population decline or range contraction. Conduct ecological studies to improve understanding of its precise habitat requirements, tolerance of secondary habitats and response to fragmentation. Grant protection to areas of suitable habitat.
Citation: BirdLife International. 2016. Aegithina viridissima. The IUCN Red List of Threatened Species 2016: e.T22707440A94124098. http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22707440A94124098.en. Downloaded on 08 March 2017.
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