shorebird vs sandpiper

shorebird and sandpiper both are nouns.

Word	Noun	Adjective	Verb	Adverb
shorebird	Yes	No	No	No
sandpiper	Yes	No	No	No

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

shorebird: any of numerous wading birds that frequent mostly seashores and estuaries
sandpiper: any of numerous usually small wading birds having a slender bill and piping call; closely related to the plovers

shorebird (noun)	sandpiper (noun)
any of numerous wading birds that frequent mostly seashores and estuaries	any of numerous usually small wading birds having a slender bill and piping call; closely related to the plovers