Turdus viscivorus vs thrush

Turdus viscivorus and thrush both are nouns.

Word	Noun	Adjective	Verb	Adverb
Turdus viscivorus	Yes	No	No	No
thrush	Yes	No	No	No

As nouns, thrush is a hypernym of Turdus viscivorus; that is, thrush is a word with a broader meaning than Turdus viscivorus:

Turdus viscivorus: large European thrush that feeds on mistletoe berries
thrush: songbirds characteristically having brownish upper plumage with a spotted breast

Turdus viscivorus (noun)	thrush (noun)
large European thrush that feeds on mistletoe berries	songbirds characteristically having brownish upper plumage with a spotted breast
	a woman who sings popular songs
	candidiasis of the oral cavity; seen mostly in infants or debilitated adults