anhinga vs pelecaniform seabird

anhinga and pelecaniform seabird both are nouns.

Word	Noun	Adjective	Verb	Adverb
anhinga	Yes	No	No	No
pelecaniform seabird	Yes	No	No	No

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

anhinga: fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill
pelecaniform seabird: large fish-eating seabird with four-toed webbed feet

anhinga (noun)	pelecaniform seabird (noun)
fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill	large fish-eating seabird with four-toed webbed feet