Rats (Rattus norvegicus) and pigeons (Columbia livia) are sensitive to the distance to food, but only rats request more food when distance increases.

@article{Reilly2012RatsN,
  title={Rats (Rattus norvegicus) and pigeons (Columbia livia) are sensitive to the distance to food, but only rats request more food when distance increases.},
  author={Mark P. Reilly and Diana Posadas-S{\'a}nchez and Lauren C Kettle and Peter R Killeen},
  journal={Behavioural processes},
  year={2012},
  volume={91 3},
  pages={236-43}
}
Three experiments investigated foraging by rats and pigeons. In Experiment 1, each response on a manipulandum delivered food to a cup, with the distance between the manipulandum and the cup varying across conditions. The number of responses made before traveling to collect and eat the food increased with distance for rats, but not for pigeons. In Experiment 2, two manipulanda were placed at different distances from a fixed food source; both pigeons and rats preferentially used the manipulandum… CONTINUE READING

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