Аннотация:Donald Griffin has suggested that cognitive ethologists can use communication between non-human animals as a "window" into animal minds. Underlying this metaphor seems to be a conception of cognition as information processing and communication as information transfer from signaller to receiver. We examine various analyses of information and discuss how these analyses affect an ongoing debate among ethologists about whether the communicative signals of some animals should be interpreted as referential signals or whether emotional accounts of such signals are adequate. We discuss the food-calling behavior of a group of rhesus monkeys to develop these issues.