shorebird vs wading bird

shorebird and wading bird both are nouns.

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

As nouns, wading bird is a hypernym of shorebird; that is, wading bird is a word with a broader meaning than shorebird:

shorebird: any of numerous wading birds that frequent mostly seashores and estuaries
wading bird: any of many long-legged birds that wade in water in search of food

Other hypernyms of shorebird include wader.

shorebird (noun)	wading bird (noun)
any of numerous wading birds that frequent mostly seashores and estuaries	any of many long-legged birds that wade in water in search of food