Rufous-crowned Elaenia

Here the details of the Rufous-crowned Elaenia named bird below:

SCI Name:  Elaenia ruficeps
Protonym:  Elainea ruficeps Orn.Brasil. Abth.2 p.108,179
Taxonomy:  Passeriformes / Tyrannidae / Elaenia
Taxonomy Code:  rucela1
Type Locality:  Borba, Brazil.
Author:  von Pelzeln
Publish Year:  1868
IUCN Status:  Least Concern

DEFINITIONS

ELAENIA
(Tyrannidae; Ϯ Yellow-bellied Elaenia E. flavogaster) Gr. ελαινεος elaineos  of olive-oil, oleaginous  < ελαια elaia  olive; "Elænia n. g. ⁶)  Musc. pagana Licht.; brevirostris, — modesta, — aurifrons Pr. Max; — Hylophilus cinerascens ejusd.  Numerosæ americanæ, transitum ad Tyrannides præbentes; Fringillis subsimiles.   ...    ⁶) Rostrum crassiusculum, breve, basi dilatatum, altitudine latius; carina dorsali subacuta, sutura recta.  Membrana narium plumulis tecta.  Vibrissæ tenues.  Alæ mediocres vel sub-breves, rotundatæ, remigib. 3-5 reliqvis longioribus.  Pedes mediocres, digitis brevibus, subliberis.  Olivaceæ-cinerascentes; sæpe subtus, interdum vertice flavæ. — Eλαινιος, oleagineus." (Sundevall 1836); "Elaenia Sundevall, 1836, Vetensk. Akad. Handl., 1835, p. 89. Type, by subsequent designation (Gray, 1855, Cat. Gen. Subgen. Birds, p. 49), Muscicapa pagana Lichtenstein = Pipra flavogaster Thunberg." (Traylor in Peters, 1979, VIII, pp. 26-27).  
Var. Elaenea, Elainea, Elainia, Eloenia, Elana, Elania.

ruficeps
L. rufus  red, ruddy; -ceps  -headed  < caput, capitis  head.
● ex “Tordo del corona de canela” of de Azara 1802-1805, no. 72 (syn. Chrysomus ruficapillus).