wading bird vs stork

wading bird and stork both are nouns.

Word	Noun	Adjective	Verb	Adverb
wading bird	Yes	No	No	No
stork	Yes	No	No	No

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

wading bird: any of many long-legged birds that wade in water in search of food
stork: large mostly Old World wading birds typically having white-and-black plumage

wading bird (noun)	stork (noun)
any of many long-legged birds that wade in water in search of food	large mostly Old World wading birds typically having white-and-black plumage