Dendroica auduboni vs Audubon's warbler

Dendroica auduboni and Audubon's warbler both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dendroica auduboni	Yes	No	No	No
Audubon's warbler	Yes	No	No	No

As nouns, Dendroica auduboni and Audubon's warbler are synonyms defined as:

Dendroica auduboni and Audubon's warbler: common warbler of western North America

Other synonyms of Dendroica auduboni include Audubon warbler.

Dendroica auduboni (noun)	Audubon's warbler (noun)
common warbler of western North America	common warbler of western North America