stilt plover vs shorebird

stilt plover and shorebird both are nouns.

Word	Noun	Adjective	Verb	Adverb
stilt plover	Yes	No	No	No
shorebird	Yes	No	No	No

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

stilt plover: long-legged three-toed black-and-white wading bird of inland ponds and marshes or brackish lagoons
shorebird: any of numerous wading birds that frequent mostly seashores and estuaries

Other hypernyms of stilt plover include limicoline bird, shore bird.

stilt plover (noun)	shorebird (noun)
long-legged three-toed black-and-white wading bird of inland ponds and marshes or brackish lagoons	any of numerous wading birds that frequent mostly seashores and estuaries