title: Symbolic Communication Between Two Pigeons, (Columba livia domestica).
abstract: Through the use of learned symbols, a pigeon accurately communicated information about hidden colors to another pigeon. Each verbal exchange was initiated with a spontaneous request for information. The two pigeons engaged in a sustained and natural conversation without human intervention.
authors.forename: R
authors.initials: R
authors.lastname: Epstein
authors.forename: R P
authors.initials: RP
authors.lastname: Lanza
authors.forename: B F
authors.initials: BF
authors.lastname: Skinner