Rhizothera longirostris


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Rhizothera longirostris
Species Authority: Ogilvie-Grant, 1905
Common Name/s:
English Long-billed Partridge
Spanish Perdiz Piquilarga

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor/s: BirdLife International
Reviewer/s: Butchart, S. & Symes, A.
Facilitator/s: Benstead, P., Mahood, S., Taylor, J.
This species is only recorded with regularity from a very few sites, but, despite the rapid habitat destruction taking place within its range, it is thought to be fairly secure owing to its tolerance of hill forest. Logging is therefore suspected to be driving a moderately rapid population decline, thus the species is classified as Near Threatened.

Geographic Range [top]

Range Description: Rhizothera longirostris occurs as two quite distinct races, the nominate inhabits the Sundaic lowlands of south Tenasserim, Myanmar, peninsular Thailand, East (Sabah) and Peninsular Malaysia, Singapore, Brunei, and Kalimantan and Sumatra, Indonesia, where it is generally uncommon, and dulitensis has a very restricted range, being confined to Mt Dulit and Mt Batu Song, Sarawak, Indonesia (BirdLife International 2001). No population estimates are available, but it is thought to be declining rapidly owing to habitat loss and degradation.

Brunei Darussalam; Indonesia; Malaysia; Myanmar; Thailand
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The population size of this species has not been quantified; according to del Hoyo et al. (1994) it is never widely encountered.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: It inhabits primary and old secondary lowland and hill forest and bamboo, up to 1,500 m in some regions, although not above 1,000 in others (BirdLife International 2001). The race dulitensis is a highland bird of forest on limestone hills.

Systems: Terrestrial

Threats [top]

Major Threat(s): Forest destruction in the Sundaic lowlands of Indonesia and Malaysia has been extensive (Kalimantan lost nearly 25% of its evergreen forest during 1985-1997, and Sumatra lost almost 30% of its 1985 cover), because of a variety of factors, including the escalation of logging and land conversion, with deliberate targeting of all remaining stands of valuable timber including those inside protected areas, plus forest fires (particularly in 1997-1998), and declines are compounded by trapping for the cage-bird industry (BirdLife International 2001). However, the species's use of secondary growth and higher elevations implies that it is not immediately threatened.

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
It occurs in a number of protected areas, including Taman Negara National Park and Gunung Leuser National Park.

Conservation Actions Proposed
Survey to assess the population size. Protect large areas of primary and old secondary forest within its range. Investigate the taxonomic status of the race dulitensis.

Citation: BirdLife International 2012. Rhizothera longirostris. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <>. Downloaded on 23 April 2014.
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