This species has a very large range, and hence does not 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.
Dowsett, R. J.; Forbes-Watson, A. D. 1993. Checklist of birds of the Afrotropical and Malagasy regions. Tauraco Press, Li
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
An odd, pale warbler of the canopy. Grey-green on cap and mantle, with a fairly conspicuous pale supercilium and off-white underparts. Many birds have a largely pale orange bill. Very characteristic hunting behaviour, walking along horizontal branches peering over alternate sides of the branch and extracting invertebrates from moss. Similar spp. From all jeries by complete lack of yellow coloration, bizarre hunting behaviour, solid and slightly decurved yellow bill, and song. Hints Most common along large rainforest rivers in lowlands and at mid-altitude, where birds sing (a loud, rather flat and descending tew-tew-tew-tew) from the tops of riverside trees. A very regular member of mixed-species groups.
del Hoyo, J.; Elliott, A.; Christie, D. 2006. Handbook of the Birds of the World, vol. 11: Old World Flycatchers to Old World Warblers. Lynx Edicions, Barcelona, Spain.
Langrand, O. 1990. Guide to the birds of Madagascar. Yale University Press, New Haven, USA.
Morris, P.; Hawkins, F. 1998. Birds of Madagascar: a photographic guide. Pica Press, Robertsbridge, UK.
Further web sources of information
Explore HBW Alive for further information on this species
Text account compilers
Fisher, S., Harding, M., Butchart, S., Ekstrom, J.
IUCN Red List evaluators
Butchart, S., Symes, A.
BirdLife International (2016) Species factsheet: Randia pseudozosterops. Downloaded from http://www.birdlife.org on 29/09/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/09/2016.
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.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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|Current IUCN Red List category||Least Concern|
|Family||Sylviidae (Old World warblers)|
|Species name author||Delacour & Berlioz, 1931|
|Population size||Unknown mature individuals|
|Distribution size (breeding/resident)||150,000 km2|
|Links to further information|
|- Additional Information on this species|