Cretzschmar's Bunting

Here the details of the Cretzschmar's Bunting named bird below:

SCI Name:  Emberiza caesia
Protonym:  Emberiza caesia AtlasReis.nord.Afr.Vog.[Ruppell](1826) -1826 p.17 pl.10 fig.6 ydP
Taxonomy:  Passeriformes / Emberizidae / Emberiza
Taxonomy Code:  crebun2
Type Locality:  Kurgos Island, ca. lat. 17° N., Nile River Berber District, Sudan.
Author:  Cretzschmar
Publish Year:  1827
IUCN Status:  Least Concern

DEFINITIONS

EMBERIZA
(Emberizidae; Ϯ Yellowhammer E. citrinella) Old Swiss German name Embritz for a bunting  < Old German Ammer  bunting. "97. EMBERIZA.  Rostrum conicum.  Mandibulæ basi deorsum a se invicem discedentes: inferiore lateribus inflexo-coarctata; superiore angustiore." (Linnaeus 1758); "Emberiza Linnaeus, 1758, Syst. Nat., ed. 10, p. 177. Type, by subsequent designation (G. R. Gray, 1840, List Genera Birds, ed. 1, p. 47), Emberiza citrinella Linnaeus." (Paynter in Peters, 1970, XIII, p. 5). Linnaeus's Emberiza comprised fourteen species (E. nivalis, E. Calandra, E. Hortulana, E. Citrinella, E. Orix, E. Quelea, E. militaris, E. atrata, E. familiaris, E. flaveola, E. psittacea, E. paradisæa, E. Ciris, E. Alario).  
Var. Emberyza, Emberitza, Embritza, Embriza, Emberisa, Emeberiza.   
Synon. Buscarla, Chrysophrys, Cia, Cirlus, Citrinella, Cosmospina, Cristemberiza, Crithophaga, Cynchramus, Fringillaria, Fringilloides, Glycyspina, Granativora, Hortulana, Hortulanus, Hylaespiza, Hypocentor, Latoucheornis, Melophus, Miliaria, Ocyris, Onychospina, Orospina, Pityornis, Polymitra, Pyrrhulorhyncha, Schaenicola, Schoeniclus, Spina, Spodiospina, Tisa.

caesia
L. caesius  bluish-grey (can also mean grey-eyed).