Bulbuls (Pycnonotidae)

Xavier's Greenbul (Phyllastrephus xavieri) - HBW 10, p. 215

French: Bulbul de Xavier German: Xavierbülbül Spanish: Bulbul de Xavier
Other common names: Greater Icterine Greenbul

Taxonomy: Xenocichla Xavieri Oustalet, 1892, Bangui, on Ubangi River, Central African Republic.
Sibling species of P. icterinus, widely sympatric and very similar in appearance; difficulties in distinguishing the two have in the past led to some taxonomic confusion, and continue to hinder understanding of their respective distributions and ecologies. Birds from Cameroon (N & W of Mt Cameroon) described as race serlei on basis of paler and duller yellow underparts, with darker olive wash on breast, but these characters fall within range of variation of the species elsewhere. Monotypic.

Distribution: Extreme SE Nigeria and W Cameroon E to SW Central African Republic, S to C Gabon and NE PRCongo; also EC DRCongo E to W & S Uganda and extreme NW Tanzania. Distribution probably not fully resolved owing to confusion with P. icterinus.

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