jaeger vs skua

jaeger and skua both are nouns.

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

As nouns, skua is a hyponym of jaeger; that is, skua is a word with a more specific, narrower meaning than jaeger:

jaeger: rapacious seabird that pursues weaker birds to make them drop their prey
skua: gull-like jaeger of northern seas

Other hyponyms of jaeger include arctic skua, parasitic jaeger, Stercorarius parasiticus, bonxie.

jaeger (noun)	skua (noun)
rapacious seabird that pursues weaker birds to make them drop their prey	gull-like jaeger of northern seas