redshank vs Tringa totanus

redshank and Tringa totanus both are nouns.

Word	Noun	Adjective	Verb	Adverb
redshank	Yes	No	No	No
Tringa totanus	Yes	No	No	No

As nouns, redshank and Tringa totanus are synonyms defined as:

redshank and Tringa totanus: a common Old World wading bird with long red legs

redshank (noun)	Tringa totanus (noun)
a common Old World wading bird with long red legs	a common Old World wading bird with long red legs