jaeger vs coastal diving bird

jaeger and coastal diving bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
jaeger	Yes	No	No	No
coastal diving bird	Yes	No	No	No

As nouns, coastal diving bird is a hypernym of jaeger; that is, coastal diving bird is a word with a broader meaning than jaeger:

jaeger: rapacious seabird that pursues weaker birds to make them drop their prey
coastal diving bird: gull family; skimmer family; jaeger family; auk family

jaeger (noun)	coastal diving bird (noun)
rapacious seabird that pursues weaker birds to make them drop their prey	gull family; skimmer family; jaeger family; auk family