Gray-headed Greenbul

Here the details of the Gray-headed Greenbul named bird below:

SCI Name:  Phyllastrephus poliocephalus
Protonym:  Xenocichla poliocephala J.Orn. 40 p.189,220
Taxonomy:  Passeriformes / Pycnonotidae / Phyllastrephus
Taxonomy Code:  gyhgre1
Type Locality:  Buea, Mt. Cameroon, 1,200 meters.
Author:  Reichenow
Publish Year:  1892
IUCN Status:  Near Threatened

DEFINITIONS

PHYLLASTREPHUS
(Pycnonotidae; Ϯ Terrestrial Brownbul P. terrestris) Gr. φυλλον phullon  leaf; στρεφω strephō  to toss, to turn;  "Genus, PHYLLASTREPHUS.  ...  Feet short, strong, robust. Anterior tarsal scales divided. Lateral toes unequal. Hinder toe shorter than the tarsus, but as long as the middle toe. Claws large, broad, hooked, acute.  Type. - Le Jaboteur, LE VAILL., pl. 112, f. 1" (Swainson 1831).
Var. Phyllostrophus (Gr. στροφαω strophaō  to turn), Phillastrephus.
Synon. Argaleocichla, Ayresillas, Sclaterillas.

POLIOCEPHALUS
(Podicipedidae; Ϯ Hoary-headed Grebe P. poliocephalus) Specific name Podiceps poliocephalus Jardine & Selby, 1827. "FAM. COLYMBIDÆ.   Genus Podiceps. LATH.  ...  Pod. (Poliocephalus, SELBY) (1) Nestor.  Australia.  ...  (1) Mr. Swainson gives to this group a generic value, but we doubt whether it is even entitled to a subgeneric rank." (Selby 1840); "Poliocephalus Selby, Cat. Gen. Subgen. Types Av., 1840, p. 47. Type, by monotypy and tautonymy, Podiceps poliocephalus Jardine and Selby." (Peters 1931, 1, 35) (see nestor).
Var. Poliocephelus.
Synon. Colymbetes, Dasyptilus.

poliocephalus
Gr. πολιος polios  grey, grizzled; -κεφαλος -kephalos  -headed  < κεφαλη kephalē  head.
● ex “Grey-headed Cuckow” of Latham 1787 (Cuculus).
● ex “Ash-headed Thrush” of Latham 1801 (Turdus).