Symposiachrus browni 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Passeriformes Monarchidae

Scientific Name: Symposiachrus browni (Ramsay, 1883)
Common Name(s):
English Kolombangara Monarch, Kulambangra Monarch
Monarcha browni Ramsay, 1883
Taxonomic Source(s): del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Dutson, G.
Facilitator/Compiler(s): Dutson, G., Khwaja, N., Mahood, S., O'Brien, A.
This species has a moderately small range in which logging is intensifying. Since it is fairly intolerant of degraded forest it qualifies as Near Threatened. However, some of the races which occur on very small islands may be very much more threatened.

Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is endemic to the New Georgia group of islands in the Solomon Islands. It is a low-density forest species with a small total population, described as "rather uncommon" (Dutson 2011). It occurs as four quite distinct races, some of which are single island endemics. In particular the distinct subspecies ganongae on Ranongga (where there is little remaining forest), and nigrotectus on Vella Lavella (where logging is extensive) and Bangga, are naturally scarce and therefore highly threatened (Gibbs 1996, G. Dutson pers. obs. 1998, Hornbuckle 1999, Dutson 2011).

Countries occurrence:
Solomon Islands
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:14800
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:No
Upper elevation limit (metres):600
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 or fairly common. Race nigrotectus is described as uncommon and race ganongae is described as rare (del Hoyo et al. 2006).

Trend Justification:  There are no data on population trends; however, the species is suspected to be in slow decline owing to logging, which is currently increasing in extent and intensity throughout the Solomon Islands.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:UnknownContinuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:It is a primary forest species, rarely found in degraded forest habitats, to a maximum of 600 m.

Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):4.3
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): Widespread logging across the area is causing a decline, but it has strongholds in forest reserves on Kolombangara and unlogged areas on other islands (Blaber 1990, Buckingham et al. 1995, G. Dutson pers. obs. 1998, Hornbuckle 1999) and does not yet have a fragmented distribution. Any significant increase in the areas being logged on these islands could render the species threatened.

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
None is known.

Conservation Actions Proposed
Regularly monitor the populations of all races at selected sites. Research its tolerance of degraded forest. Protect significant areas of remaining primary forest from logging on all islands where it occurs. Fully investigate the taxonomic status of the four races.

Citation: BirdLife International. 2016. Symposiachrus browni. The IUCN Red List of Threatened Species 2016: e.T22707326A94117538. . Downloaded on 24 September 2018.
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