As nouns,
Quiscalus quiscula is a hyponym of
crow blackbird; that is, Quiscalus quiscula is a
word with a more specific, narrower meaning than
crow blackbird:
crow blackbird: long-tailed American blackbird having iridescent black plumage
Quiscalus quiscula: eastern United States grackle
Other hyponyms of crow blackbird include
purple grackle.