guan vs piping guan

guan and piping guan both are nouns.

Word	Noun	Adjective	Verb	Adverb
guan	Yes	No	No	No
piping guan	Yes	No	No	No

As nouns, piping guan is a hyponym of guan; that is, piping guan is a word with a more specific, narrower meaning than guan:

guan: any of several large turkey-like game birds of the family Cracidae; native to jungles of tropical America; resembling the curassows and valued as food
piping guan: a kind of guan

guan (noun)	piping guan (noun)
any of several large turkey-like game birds of the family Cracidae; native to jungles of tropical America; resembling the curassows and valued as food	a kind of guan