Alca torda vs auk

Alca torda and auk both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alca torda	Yes	No	No	No
auk	Yes	No	No	No

As nouns, auk is a hypernym of Alca torda; that is, auk is a word with a broader meaning than Alca torda:

Alca torda: black-and-white northern Atlantic auk having a compressed sharp-edged bill
auk: black-and-white short-necked web-footed diving bird of northern seas

Alca torda (noun)	auk (noun)
black-and-white northern Atlantic auk having a compressed sharp-edged bill	black-and-white short-necked web-footed diving bird of northern seas