Definition of new world blackbird:
(n) :
Certain blackbirds found in the New World in the genera of family Icteridae, to wit, Xanthocephalus, Nesopsar, Agelaius, Dives, Ptiloxena, Euphagus, Gymnomystax, Amblyramphus, Curaeus, Anumara, Gnorimopsar, Oreopsar, Agelasticus, Chrysomus, and Xanthopsar.