Chlamydera nuchalis vs catbird

Chlamydera nuchalis and catbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chlamydera nuchalis	Yes	No	No	No
catbird	Yes	No	No	No

As nouns, catbird is a hypernym of Chlamydera nuchalis; that is, catbird is a word with a broader meaning than Chlamydera nuchalis:

Chlamydera nuchalis: large bowerbird of northern Australia
catbird: any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females

Other hypernyms of Chlamydera nuchalis include bowerbird.

Chlamydera nuchalis (noun)	catbird (noun)
large bowerbird of northern Australia	North American songbird whose call resembles a cat's mewing
	any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females