It depends on which species of blackbird you are referring to. The Eurasian Blackbird is a species of thrush with the scientific nameTurdus merula.
In the New World, however, "blackbird" refers to the family Icteridae which includes New World blackbirds, New World orioles, the Bobolink, meadowlarks, grackles, cowbirds, oropendolas, and caciques. Collectively these New World blackbirds are known as icterids. Below are some Icterids commonly found in North America:
Red-Winged Blackbird - Agelaius phoeniceus
Brewer's Blackbird -
Euphagus cyanocephalus
Common Grackle -
Quiscalus quiscula
Great-Tailed Grackle -
Quiscalus mexicanus
Western Meadowlark -
Sturnella neglecta
Eastern Meadowlark -
Sturnella magna
Bobolink -
Dolichonyx oryzivorus
Baltimore Oriole -
Icterus galbula
Bullock's Oriole -
Icterus bullockii
Hooded Oriole -
Icterus cucullatus
Brown-Headed Cowbird -
Molothrus ater
Bronzed Cowbird -
Molothrus aeneus
Yellow-Winged Cacique -
Cacicus melanicterus