sedge warbler vs sedge bird

sedge warbler and sedge bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
sedge warbler	Yes	No	No	No
sedge bird	Yes	No	No	No

As nouns, sedge warbler and sedge bird are synonyms defined as:

sedge warbler and sedge bird: small European warbler that breeds among reeds and wedges and winters in Africa

Other synonyms of sedge warbler include Acrocephalus schoenobaenus, reedbird, sedge wren.

sedge warbler (noun)	sedge bird (noun)
small European warbler that breeds among reeds and wedges and winters in Africa	small European warbler that breeds among reeds and wedges and winters in Africa