Pigeons on Par with Primates in Numerical Competence

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Science  23 Dec 2011:
Vol. 334, Issue 6063, pp. 1664
DOI: 10.1126/science.1213357

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Although many animals are able to discriminate stimuli differing in numerosity, only primates are thought to share our ability to employ abstract numerical rules. Here, we show that this ability is present in pigeons and that their performance is indistinguishable from that displayed by monkeys.

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