Himantopus mexicanus vs black-necked stilt

Himantopus mexicanus and black-necked stilt both are nouns.

Word	Noun	Adjective	Verb	Adverb
Himantopus mexicanus	Yes	No	No	No
black-necked stilt	Yes	No	No	No

As nouns, Himantopus mexicanus and black-necked stilt are synonyms defined as:

Himantopus mexicanus and black-necked stilt: stilt of southwestern United States to northern South America having black plumage extending from the head down the back of the neck

Himantopus mexicanus (noun)	black-necked stilt (noun)
stilt of southwestern United States to northern South America having black plumage extending from the head down the back of the neck	stilt of southwestern United States to northern South America having black plumage extending from the head down the back of the neck