ibis vs wood stork

ibis and wood stork both are nouns.

Word	Noun	Adjective	Verb	Adverb
ibis	Yes	No	No	No
wood stork	Yes	No	No	No

As nouns, wood stork is a hyponym of ibis; that is, wood stork is a word with a more specific, narrower meaning than ibis:

Other hyponyms of ibis include Ibis ibis, wood ibis, sacred ibis, Threskiornis aethiopica.

ibis (noun)	wood stork (noun)
wading birds of warm regions having long slender down-curved bills	an American stork that resembles the true ibises in having a downward-curved bill; inhabits wooded swamps of New World tropics
	any of several Old World birds of the genus Ibis