Answer: carrierpigeon

AnswerCrossword Clue
CARRIERPIGEONAirborne messenger
CARRIERPIGEONOne way to send a message.
CARRIERPIGEONPatsy on a warship?
CARRIERPIGEONOne way to get a message across
CARRIERPIGEONShipboard bird?