great white heron vs Ardea occidentalis

great white heron and Ardea occidentalis both are nouns.

Word	Noun	Adjective	Verb	Adverb
great white heron	Yes	No	No	No
Ardea occidentalis	Yes	No	No	No

As nouns, great white heron and Ardea occidentalis are synonyms defined as:

great white heron and Ardea occidentalis: large white heron of Florida and the Florida Keys

great white heron (noun)	Ardea occidentalis (noun)
large white heron of Florida and the Florida Keys	large white heron of Florida and the Florida Keys
widely distributed Old World white egret
a common egret of the genus Egretta found in America; it is a variety of the Old World white egret Casmerodius albus