killdeer plover vs plover

killdeer plover and plover both are nouns.

Word	Noun	Adjective	Verb	Adverb
killdeer plover	Yes	No	No	No
plover	Yes	No	No	No

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

killdeer plover: American plover of inland waters and fields having a distinctive cry
plover: any of numerous chiefly shorebirds of relatively compact build having straight bills and large pointed wings; closely related to the sandpipers

killdeer plover (noun)	plover (noun)
American plover of inland waters and fields having a distinctive cry	any of numerous chiefly shorebirds of relatively compact build having straight bills and large pointed wings; closely related to the sandpipers