redshank vs sandpiper

redshank and sandpiper both are nouns.

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

As nouns, sandpiper is a hypernym of redshank; that is, sandpiper is a word with a broader meaning than redshank:

redshank: a common Old World wading bird with long red legs
sandpiper: any of numerous usually small wading birds having a slender bill and piping call; closely related to the plovers

redshank (noun)	sandpiper (noun)
a common Old World wading bird with long red legs	any of numerous usually small wading birds having a slender bill and piping call; closely related to the plovers