peregrine falcon vs Falco peregrinus

peregrine falcon and Falco peregrinus both are nouns.

Word	Noun	Adjective	Verb	Adverb
peregrine falcon	Yes	No	No	No
Falco peregrinus	Yes	No	No	No

As nouns, peregrine falcon and Falco peregrinus are synonyms defined as:

peregrine falcon and Falco peregrinus: a widely distributed falcon formerly used in falconry

Other synonyms of peregrine falcon include peregrine.

peregrine falcon (noun)	Falco peregrinus (noun)
a widely distributed falcon formerly used in falconry	a widely distributed falcon formerly used in falconry