Parus atricapillus vs black-capped chickadee

Parus atricapillus and black-capped chickadee both are nouns.

Word	Noun	Adjective	Verb	Adverb
Parus atricapillus	Yes	No	No	No
black-capped chickadee	Yes	No	No	No

As nouns, Parus atricapillus and black-capped chickadee are synonyms defined as:

Parus atricapillus and black-capped chickadee: chickadee having a dark crown

Other synonyms of Parus atricapillus include blackcap.

Parus atricapillus (noun)	black-capped chickadee (noun)
chickadee having a dark crown	chickadee having a dark crown