Turdus migratorius vs thrush

Turdus migratorius and thrush both are nouns.

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

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

Turdus migratorius: large American thrush having a rust-red breast and abdomen
thrush: songbirds characteristically having brownish upper plumage with a spotted breast

Turdus migratorius (noun)	thrush (noun)
large American thrush having a rust-red breast and abdomen	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