mallard vs Anas platyrhynchos

mallard and Anas platyrhynchos both are nouns.

Word	Noun	Adjective	Verb	Adverb
mallard	Yes	No	No	No
Anas platyrhynchos	Yes	No	No	No

As nouns, mallard and Anas platyrhynchos are synonyms defined as:

mallard and Anas platyrhynchos: wild dabbling duck from which domestic ducks are descended; widely distributed

mallard (noun)	Anas platyrhynchos (noun)
wild dabbling duck from which domestic ducks are descended; widely distributed	wild dabbling duck from which domestic ducks are descended; widely distributed