Strix occidentalis vs spotted owl

Strix occidentalis and spotted owl both are nouns.

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

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

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

Strix occidentalis (noun)	spotted owl (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