dunlin vs red-backed sandpiper

dunlin and red-backed sandpiper both are nouns.

Word	Noun	Adjective	Verb	Adverb
dunlin	Yes	No	No	No
red-backed sandpiper	Yes	No	No	No

As nouns, dunlin and red-backed sandpiper are synonyms defined as:

dunlin and red-backed sandpiper: small common sandpiper that breeds in northern or Arctic regions and winters in southern United States or Mediterranean regions

Other synonyms of dunlin include Erolia alpina.

dunlin (noun)	red-backed sandpiper (noun)
small common sandpiper that breeds in northern or Arctic regions and winters in southern United States or Mediterranean regions	small common sandpiper that breeds in northern or Arctic regions and winters in southern United States or Mediterranean regions