Turdus pilaris vs snowbird

Turdus pilaris and snowbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
Turdus pilaris	Yes	No	No	No
snowbird	Yes	No	No	No

As nouns, Turdus pilaris and snowbird are synonyms defined as:

Turdus pilaris and snowbird: medium-sized Eurasian thrush seen chiefly in winter

Other synonyms of Turdus pilaris include fieldfare.

Turdus pilaris (noun)	snowbird (noun)
medium-sized Eurasian thrush seen chiefly in winter	white Arctic bunting
	small North American finch seen chiefly in winter
	medium-sized Eurasian thrush seen chiefly in winter