carrier pigeons

Webster's Dictionary (GCIDE)

1.(Zool.) A pigeon of the genus Columba and various related genera. The species are numerous. [1913 Webster]

Note: The domestic dove, including the varieties called fantails, tumblers, carrier pigeons, etc., was derived from the rock pigeon (Columba livia) of Europe and Asia; the turtledove of Europe, celebrated for its sweet, plaintive note, is Columba turtur or Turtur vulgaris; the ringdove, the largest of European species, is Columba palumbus; the Carolina dove, or Mourning dove, is Zenaidura macroura; the sea dove is the little auk (Mergulus alle or Alle alle). See Turtledove, Ground dove, and Rock pigeon. The dove is a symbol of peace, innocence, gentleness, and affection; also, in art and in the Scriptures, the typical symbol of the Holy Ghost. [1913 Webster]

2.A word of endearment for one regarded as pure and gentle. [1913 Webster]

O my dove, . . . let me hear thy voice.— Cant. ii. 14.[1913 Webster]

3.a person advocating peace, compromise or conciliation rather than war or conflict. Opposite of hawk. [PJC]

Dove tick (Zool.), a mite (Argas reflexus) which infests doves and other birds.

Soiled dove, a prostitute. [Slang] Dovecot