Erithacus svecicus vs thrush

Erithacus svecicus and thrush both are nouns.

Word	Noun	Adjective	Verb	Adverb
Erithacus svecicus	Yes	No	No	No
thrush	Yes	No	No	No

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

Erithacus svecicus: songbird of northern Europe and Asia
thrush: songbirds characteristically having brownish upper plumage with a spotted breast

Erithacus svecicus (noun)	thrush (noun)
songbird of northern Europe and Asia	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