Justification Although this species may have a restricted range, it is not believed to approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Family/Sub-family Acanthizidae

Species name author (Lewin, 1808)

Taxonomic source(s) Christidis and Boles (1994), Sibley and Monroe (1990, 1993)

Identification

Population estimate

Population trend

Range estimate (breeding/resident)

Country endemic?

unknown

unset

-

Yes

Range & population This taxon is the only bird species endemic to New South Wales, Australia. It is abundant through a large area of the Hawkesbury Sandstone both north and south of Sydney. A recent decline of 65% in reporting rate for this species in its core bioregion, the Sydney basin, based on atlas survey work, is not associated with a contraction in range and is believed to be an artefact of observer behaviour, as during the second atlas survey birders visited fewer forest fragments where the species occurs.

Important Bird Areas Click here to view map showing IBAs where species is recorded and triggers any of the IBA criteria.

Threats The species has suffered from urban developments on the edges of its range near Sydney (Blakers et al. 1984), however, most of its habitat is now protected within national parks and reserves (del Hoyo et al. 2007).

References Blakers et al. 1984, Garnett 1992, Flegg and Madge 1995.

Text account compilers Stuart Butchart (BirdLife International), Jonathan Ekstrom (BirdLife International), Sally Fisher (BirdLife International), Matt Harding (BirdLife International)

IUCN Red List evaluators Jeremy Bird (BirdLife International), Stuart Butchart (BirdLife International)

Recommended citation BirdLife International (2009) Species factsheet: Origma solitaria. Downloaded from http://www.birdlife.org on 9/2/2010

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.

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