Circus cyaneus vs hen harrier

Circus cyaneus and hen harrier both are nouns.

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

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

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

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

Circus cyaneus (noun)	hen 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