1.  blackbird(n = noun.animal) new world blackbird - any bird of the family Icteridae whose male is black or predominantly black;
is a kind of american oriole, new world oriole, oriole
has particulars: crow blackbird, grackle, euphagus carilonus, rusty blackbird, rusty grackle, cowbird, agelaius phoeniceus, red-winged blackbird, redwing

2.  blackbird(n = noun.animal) european blackbird, merl, merle, ousel, ouzel, turdus merula - common black European thrush;
is a kind of thrush
is a member of genus turdus, turdus

   In England, a species of thrush (Turdus merula), a singing bird with a fin note; the merle. In America the name is given to several birds, as the Quiscalus versicolor, or crow blackbird; the Agelæus phœniceus, or red-winged blackbird; the cowbird; the rusty grackle, etc. See Redwing. [1913 Webster]

1.  Among slavers and pirates, a negro or Polynesian. [Webster 1913 Suppl.]

2.  A native of any of the islands near Queensland; -- called also Kanaka. [Webster 1913 Suppl.]

   to engage in the slave trade. [PJC]

blackbird, n.
1 a common thrush, Turdus merula, of which the male is black with an orange beak.
2 US any of various birds, esp. a grackle, with black plumage.
3 hist. a kidnapped Negro or Polynesian on a slave-ship.

crow blackbird, european blackbird, new world blackbird, red-winged blackbird, ring blackbird, rusty blackbird, water blackbird