band-tail pigeon vs pigeon

band-tail pigeon and pigeon both are nouns.

Word	Noun	Adjective	Verb	Adverb
band-tail pigeon	Yes	No	No	No
pigeon	Yes	No	No	No

As nouns, pigeon is a hypernym of band-tail pigeon; that is, pigeon is a word with a broader meaning than band-tail pigeon:

band-tail pigeon: wild pigeon of western North America; often mistaken for the now extinct passenger pigeon
pigeon: wild and domesticated birds having a heavy body and short legs

band-tail pigeon (noun)	pigeon (noun)
wild pigeon of western North America; often mistaken for the now extinct passenger pigeon	wild and domesticated birds having a heavy body and short legs