arctic skua vs jaeger

arctic skua and jaeger both are nouns.

Word	Noun	Adjective	Verb	Adverb
arctic skua	Yes	No	No	No
jaeger	Yes	No	No	No

As nouns, jaeger is a hypernym of arctic skua; that is, jaeger is a word with a broader meaning than arctic skua:

arctic skua: a variety of jaeger
jaeger: rapacious seabird that pursues weaker birds to make them drop their prey

arctic skua (noun)	jaeger (noun)
a variety of jaeger	rapacious seabird that pursues weaker birds to make them drop their prey