Liberian Greenbul, Phyllastrephus leucolepis, has been recorded from two forest patches in south-east Liberia (Gatter 1985), and was previously listed as Critically Endangered under criterion B1ab(i,ii,iii,v). Surveys in 2010 and 2013 both failed to find the species (Molubah and Garbo 2010; Phalan et al. 2013), and it is only known from the type specimen and further sightings from the collector of that specimen in the area around the type locality; with the most recent sighting in 1985 (see Fishpool et al. 2016). Its status remains unclear, in particular its relationship to Icterine Greenbul, P. icterinus, (which it very closely resembles) (Fishpool et al. 2016) and so, given the current uncertainty over its status and the lack of recent information regarding this species, it will be re-assessed as Data Deficient.
Fishpool, L., Tobias, J. & Sharpe, C.J. (2016). Liberian Greenbul (Phyllastrephus leucolepis). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from http://www.hbw.com/node/57996 on 21 October 2016).
Gatter, W. 1985. Ein neuer Bulbul aus Westafrika (Aves, Pycnonotidae). Journal of Ornithology 126: 155-161.
Molubah, F. P.; Garbo, M. 2010. Liberian Greenbul – Phyllastrephus leucolepis Survey Report, July 2010. Society for the Conservation of Nature of Liberia (SCNL).
Phalan, B., Fishpool, L.D.C, Loqueh, E.M., Grimes, T., Molubah, F.P. and Garbo, M. 2013. Liberian Greenbul expedition 2013: Final report. Unpublished report to African Bird Club and RSPB. Cambridge, United Kingdom.