||Woxvold, Duckworth and Timmins, 2009
||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.
||Striking and diagnostic features are the near-absence of countour feathering on the face and side of the head, the presence of extensive pale blue periorbital and loral skin and orange-pink skin on the rear sides of the head and below the eye to the malar area; and loose, hair-like filoplumes along the mid-crown and reduction of anterior ear-coverts to a series of unbarbed bristles that cover the ear opening. Grey-brown body colouring and olive-toned upperparts, erectile nuchal collar, distinctly paler, fawn-grey underparts, off-white throat and olive-green remiges in folded wings. Voice. Most common vocalisation is a short (<1 second) series of whistled, dry bubbling notes.
|Red List Category & Criteria:
||Butchart, S. & Symes, A.
This species has a 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). The population trend is not known, but the population is not believed to be decreasing sufficiently rapidly to approach the thresholds 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.
|Previously published Red List assessments:|
- 2012 – Least Concern (LC)
- 2010 – Least Concern (LC)
- 2008 – Not Recognized (NR)
- 2004 – Not Recognized (NR)
- 2000 – Not Recognized (NR)
- 1994 – Not Recognized (NR)
- 1988 – Not Recognized (NR)