Anhinga anhinga vs anhinga

Anhinga anhinga and anhinga both are nouns.

Word	Noun	Adjective	Verb	Adverb
Anhinga anhinga	Yes	No	No	No
anhinga	Yes	No	No	No

As nouns, anhinga is a hypernym of Anhinga anhinga; that is, anhinga is a word with a broader meaning than Anhinga anhinga:

Anhinga anhinga: blackish New World snakebird of swampy regions
anhinga: fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill

Other hypernyms of Anhinga anhinga include darter, snakebird.

Anhinga anhinga (noun)	anhinga (noun)
blackish New World snakebird of swampy regions	fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill