Surnia ulula vs owl

Surnia ulula and owl both are nouns.

Word	Noun	Adjective	Verb	Adverb
Surnia ulula	Yes	No	No	No
owl	Yes	No	No	No

As nouns, owl is a hypernym of Surnia ulula; that is, owl is a word with a broader meaning than Surnia ulula:

Surnia ulula: grey-and-white diurnal hawk-like owl of northern parts of the Northern Hemisphere
owl: nocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes

Other hypernyms of Surnia ulula include bird of Minerva, bird of night, hooter.

Surnia ulula (noun)	owl (noun)
grey-and-white diurnal hawk-like owl of northern parts of the Northern Hemisphere	nocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes