Sapiens: A Brief History of Humankind · chapter 2 · id sapiens-c2-04-animal-communication-is-limite

“Animal communication is limited to signaling about immediate, concrete things. Only human language can refer to things that don't exist, discuss abstractions, and transmit unlimited information.”

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Seyfarth, Cheney & Marler (1980), Science 210(4471):801-803FLAGGED: DOI not in registry

Vervet monkeys produce distinct alarm calls for different predator classes (eagle, leopard, snake), each eliciting appropriate evasive responses. This is referential signaling, not mere emotional expression.

Hauser, Chomsky & Fitch (2002), Science 298(5598):1569-1578DOI registry: valid

The faculty of language in the narrow sense (recursion) may be uniquely human, but the broader faculty (including referential signaling, displacement) is shared with other species to varying degrees.

Slobodchikoff et al. (2009), Animal Cognition 12:435-439FLAGGED: DOI not in registry

Prairie dog alarm calls encode predator type, size, color, speed, and shape -- far more informationally rich than simple 'danger' signals.

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