spotted owl vs Strix occidentalis

spotted owl and Strix occidentalis both are nouns.

Word	Noun	Adjective	Verb	Adverb
spotted owl	Yes	No	No	No
Strix occidentalis	Yes	No	No	No

As nouns, spotted owl and Strix occidentalis are synonyms defined as:

spotted owl and Strix occidentalis: a large owl of North America found in forests from British Columbia to central Mexico; has dark brown plumage and a heavily spotted chest

spotted owl (noun)	Strix occidentalis (noun)
a large owl of North America found in forests from British Columbia to central Mexico; has dark brown plumage and a heavily spotted chest	a large owl of North America found in forests from British Columbia to central Mexico; has dark brown plumage and a heavily spotted chest