There are two major groups of Blackbirds, Old World in the genus Turdus, and New World consisting of 26 species consisting of 14 genera.

Bolivian Blackbird (Agelaioides oreopsar)

Red-shouldered Blackbird (Agelaius assimilis)
Red-winged Blackbird (Agelaius phoeniceus)
Tawny-shouldered Blackbird (Agelaius humeralis)
Tricolored Blackbird (Agelaius tricolor)
Yellow-shouldered Blackbird (Agelaius xanthomus)

Pale-eyed Blackbird (Agelasticus xanthophthalmus)
Unicolored Blackbird (Agelasticus cyanopus)
Yellow-winged Blackbird (Agelasticus thilius)

Scarlet-headed Blackbird (Amblyramphus holosericeus)

Austral Blackbird (Curaeus curaeus)
Forbes's Blackbird (Curaeus forbesi)

Chestnut-capped Blackbird (Chrysomus ruficapillus)
Yellow-hooded Blackbird (Chrysomus icterocephalus)

Cuban Blackbird (Dives atroviolaceus)
Melodious Blackbird (Dives dives)
Scrub Blackbird (Dives warszewiczi)

Brewer's Blackbird (Euphagus cyanocephalus)
Rusty Blackbird (Euphagus carolinus)

Chopi Blackbird (Gnorimopsar chopi)

Oriole Blackbird (Gymnomystax mexicanus)

Jamaican Blackbird (Nesopsar nigerrimus)

Red-breasted Blackbird (Sturnella militaris)
White-browed Blackbird (Sturnella superciliaris)

Saffron-cowled Blackbird (Xanthopsar flavus)

Yellow-headed Blackbird (Xanthocephalus xanthocephalus)