nightjar vs caprimulgiform bird

nightjar and caprimulgiform bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
nightjar	Yes	No	No	No
caprimulgiform bird	Yes	No	No	No

As nouns, caprimulgiform bird is a hypernym of nightjar; that is, caprimulgiform bird is a word with a broader meaning than nightjar:

nightjar: mainly crepuscular or nocturnal nonpasserine birds with mottled greyish-brown plumage and large eyes; feed on insects
caprimulgiform bird: long-winged nonpasserine birds

nightjar (noun)	caprimulgiform bird (noun)
mainly crepuscular or nocturnal nonpasserine birds with mottled greyish-brown plumage and large eyes; feed on insects	long-winged nonpasserine birds