Himantopus himantopus vs stilt

Himantopus himantopus and stilt both are nouns.

Word	Noun	Adjective	Verb	Adverb
Himantopus himantopus	Yes	No	No	No
stilt	Yes	No	No	No

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

Himantopus himantopus: stilt of Europe and Africa and Asia having mostly white plumage but with black wings
stilt: long-legged three-toed black-and-white wading bird of inland ponds and marshes or brackish lagoons

Other hypernyms of Himantopus himantopus include Himantopus stilt, long-legs, longlegs, stilt plover, stiltbird.

Himantopus himantopus (noun)	stilt (noun)
stilt of Europe and Africa and Asia having mostly white plumage but with black wings	long-legged three-toed black-and-white wading bird of inland ponds and marshes or brackish lagoons
	long-legged three-toed wading bird of brackish marshes of Australia
	one of two stout poles with foot rests in the middle; used for walking high above the ground
	a column of wood or steel or concrete that is driven into the ground to provide support for a structure