how is the name formed?
From two generic names - Dromiceius, Dromaius
Dromaius
In his original 1816 description of the emu, Louis Jean Pierre Vieillot used two generic names; first "Dromiceius", then "Dromaius" a few pages later. 
what is the scientific name of emu? Dromaius novaehollandiae what is its conservation status? Least concern what does it feed on? Plants as "Acacia", "Casuarina" and grasses; insects which genus does it belong to? Dromaius
wiki:1900508
Dromaius [SEP] Introduction
Dromaius is a genus of ratite present in Australia. There is one extant species, "Dromaius novaehollandiae" commonly known as the emu. In his original 1816 description of the emu, Louis Jean Pierre Vieillot used two generic names; first "Dromiceius", then "Dromaius" a few pages later. It has been a point of contention ever since which is correct; the latter is more correctly formed, but the convention in taxonomy is that the first name given stands, unless it is clearly a typographical error, as argued by W.B. Alexander. For names published on the same day, or in the same publication, the International Code of Zoological Nomenclature states that both names have equal precedence, and that the Principle of First Reviser (Article 24.2 ) determines which name is to be used.