Pigeons on Par with Primates in Numerical Competence

@article{Scarf2011PigeonsOP,
  title={Pigeons on Par with Primates in Numerical Competence},
  author={Damian Scarf and Harlene Hayne and Michael Colombo},
  journal={Science},
  year={2011},
  volume={334},
  pages={1664 - 1664}
}
Pigeons’ ability to use abstract numerical rules appears identical to that of monkeys. 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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