Robsonius rabori


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Robsonius rabori
Species Authority: (Rand, 1960)
Common Name(s):
English Rusty-faced Babbler
Taxonomic Notes: Napothera rabori (Sibley and Monroe 1990, 1993) has been moved into the new genus Robsonius and split into R. rabori and R. sorsogonensis following Collar (2006).

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(ii,iii,v) ver 3.1
Year Published: 2014
Date Assessed: 2014-07-24
Assessor(s): BirdLife International
Reviewer(s): Butchart, S.
Contributor(s): Allen, D., Gonzalez, J., Hosner, P. & Hutchinson, R.
Facilitator/Compiler(s): Allinson, T, Calvert, R., Symes, A. & Taylor, J.
This species is listed as Vulnerable as it has a small range, in which it is found at a limited number of locations, and its habitat is declining both in area and quality as a result of deforestation. Recent data, however, suggest that it may be present at more localities than previously thought. The taxonomic treatment of this species is under review and may change in the near future.

2012 Vulnerable

Geographic Range [top]

Range Description: Robsonius rabori is found in northern Luzon, Philippines. It is considered uncommon, although tape playback indicates it may be widely overlooked (del Hoyo et al. 2007), and it has been described as fairly common around Adams in north-western Luzon and at Mt. Cagua in north-eastern Luzon (P. Hosner in litt. 2012). The population is thought to be declining owing to habitat destruction (del Hoyo et al. 2007, R. Hutchinson in litt. 2010).

Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The global population size has not been quantified, although it has been described as uncommon. However, it may be more common than suggested by field observations, owing to its secretive habits (del Hoyo et al. 2007).

Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: This species is found in lowland forest and secondary growth from sea-level to 1,300 m. It presumably feeds on invertebrates, and has been observed walking across the forest floor searching for prey in the leaf litter, sometimes in pairs (del Hoyo et al. 2007, J. C. Gonzalez in litt. 2010). It is often encountered in the vicinity of small streams (D. Allen in litt. 2012). Very little is known about its breeding habitats. Its nest is a large dome made of dry sticks, branches and leaves (Sánchez-González et al. 2010).

Systems: Terrestrial

Threats [top]

Major Threat(s): Logging within its elevational range has been described as extensive (del Hoyo et al. 2007).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
It is present in the Northern Sierra Madre Natural Park (del Hoyo et al. 2007).

Conservation Actions Proposed
Assess the population size and establish a monitoring programme to establish trends. Establish its ability to persist in degraded habitats. Identify and assess threats. Ensure that the Northern Sierra Madre Natural Park is effectively protected

Citation: BirdLife International 2014. Robsonius rabori. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 01 September 2015.
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