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Trichoglossus forsteni 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Psittaciformes Psittacidae

Scientific Name: Trichoglossus forsteni Bonaparte, 1850
Common Name(s):
English Scarlet-breasted Lorikeet
Taxonomic Source(s): del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
Taxonomic Notes:

Trichoglossus haematodus, T. forsteni, T. capistratus, T. weberi, T. rubritorquis, T. moluccanus and T. rosenbergii (del Hoyo and Collar 2014) were previously lumped as T. haematodus following Christidis and Boles (1994), and before then were split as T. haematodus and T. rubritorquis following Sibley and Monroe (1990, 1993).

Identification information: 25-30 cm. Distinctive, colourful parakeets with a dark blue head, pale green collar, plain red breast, and dark blue belly. Rest of the plumage is a bright pale green, and the typical parakeet bill is red. In flight the species shows a bright yellow wing flash across the inner part of all flight feathers, and deep red underwing coverts. Similar spp. None in range, but previously included with T. haematodus along with T. capistratus, T. weberi, T. rubritorquis, T. moluccanus, and T. rosenbergii. It is distinct from all of these in the combination of plain red breast, dark blue belly, and virtually unstreaked dark blue head. Voice. A harsh, repeated screech "keek, keek, keek..." in flight; twittering and chattering when settled.

Assessment Information [top]

Red List Category & Criteria: Vulnerable C2a(i) ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Chng, S. & Eaton, J.
Facilitator/Compiler(s): Butchart, S., Ekstrom, J., Harding, M., Martin, R, Stattersfield, A., Symes, A. & Taylor, J.
Justification:
This newly-split species is estimated to have a small population which is suspected to be undergoing moderately rapid population declines owing to trapping pressure for the wild bird trade. It is therefore classified as Vulnerable.
Previously published Red List assessments:

Geographic Range [top]

Range Description:T. forsteni (incorporating mitchelli, djampeanus and stresemanni) is found on the islands of Bali, Lombok, Sumbawa, Tanahjampea and Kalaotoa, Indonesia. An evaluation of the status of the taxa comprising the species indicates that the species may now no longer occur on Bali, has become extinct on Tanahjampea following trapping principally prior to 1990 and it is unclear if it persists on Kalatoa (Eaton et al. 2015). On Lombok the species does still occur, with a recent observation of a flock of 18 above 1,500 m in 2015 (F. Rheindt per Eaton et al. 2015), though given the lack of other records for many decades it can be assumed that the population is likely to be small. Sumbawa may now be the stronghold of the species, and the species was suggested to be ‘secure’ (Eaton et al. 2015), and there is a large area of potentially suitable habitat remaining on the island.
Countries occurrence:
Native:
Indonesia
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:101000
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:10-19Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:No
Upper elevation limit (metres):700
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population size is estimated to number fewer than 10,000 mature individuals, based on a tentative assessment of the locations likely to retain any numbers of the species. It is further considered possible that the assumed largest population on Sumbawa may well not exceed 1,000 mature individuals.

Trend Justification:  The population is suspected to be undergoing a moderately rapid decline owing to unsustainable levels of exploitation.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:1600-7000Continuing decline of mature individuals:Yes
Extreme fluctuations:NoPopulation severely fragmented:No
No. of subpopulations:3-5Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No
No. of individuals in largest subpopulation:1-89

Habitat and Ecology [top]

Habitat and Ecology:Found in lowland and lower montane forest, including secondary growth and plantations, tending to occur at edges and around disturbed vegetation rather than in interior closed-canopy forest (del Hoyo et al. 1997). On Sumbawa T. forsteni ranges from sea level up to 800-1200 m and to 2150 m on Lombok (del Hoyo et al. 1997); at least on Sumbawa variation in altitudinal range is ascribed to movements made in tracking flowering trees over a large area (White and Bruce 1986). Birds have been reported in breeding condition in May from Sumbawa (White and Bruce 1986). Nests in a deep hole in a large tree (del Hoyo et al. 1997).
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):5.7
Movement patterns:Nomadic

Threats [top]

Major Threat(s): The primary threat is trapping for trade.

Conservation Actions [top]

Conservation Actions: Conservation and research actions underway
CITES Appendix II. CMS Appendix II.

Conservation and research actions proposed
Estimate population and assess population trend and scale of trapping pressure. Conduct a targeted survey for the species to identify important sites, with a view to affording them protection. Conduct research into its status and habitat use (with particular regard to feeding ecology and forest fragmentation). Initiate awareness campaigns to elicit the support of local people in protecting forests and preventing illegal trade.

Citation: BirdLife International. 2016. Trichoglossus forsteni. The IUCN Red List of Threatened Species 2016: e.T22726303A94917765. . Downloaded on 18 November 2017.
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