Real Dictionary

blackbird
countable noun: A blackbird is a common European bird. The male has black feathers and a yellow beak, and the female has brown feathers.
countable noun: A blackbird is a common North American bird. The male has black feathers and often a red patch on its wings.

blackbird in American English
any of various passerine birds (family Icteridae) of the New World, the males having almost entirely black plumage, as the red-winged blackbird or the grackle
intransitive verb: to engage in blackbirding
noun: a common European thrush, Turdus merula, the male of which is black with a yellow bill
transitive verb: to kidnap (a person), as in blackbirding

blackbird in British English
noun: a common European thrush, Turdus merula, in which the male has a black plumage and yellow bill and the female is brown