Circus cyaneus vs northern harrier

Circus cyaneus and northern harrier both are nouns.

Word	Noun	Adjective	Verb	Adverb
Circus cyaneus	Yes	No	No	No
northern harrier	Yes	No	No	No

As nouns, Circus cyaneus and northern harrier are synonyms defined as:

Circus cyaneus and northern harrier: common harrier of North America and Europe; nests in marshes and open land

Other synonyms of Circus cyaneus include hen harrier, marsh hawk.

Circus cyaneus (noun)	northern harrier (noun)
common harrier of North America and Europe; nests in marshes and open land	common harrier of North America and Europe; nests in marshes and open land