2024
DOI: 10.1007/s10071-024-01878-2
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Perception of optical illusions in ungulates: insights from goats, sheep, guanacos and llamas

Caterina Berardo,
Ruben Holland,
Alina Schaffer
et al.

Abstract: Optical illusions have long been used in behavioural studies to investigate the perceptual mechanisms underlying vision in animals. So far, three studies have focused on ungulates, providing evidence that they may be susceptible to some optical illusions, in a way similar to humans. Here, we used two food-choice tasks to study susceptibility to the Müller-Lyer and Delboeuf illusions in 17 captive individuals belonging to four ungulate species (Lama guanicoe, Lama glama, Ovis aries, Capra hircus). At the group … Show more

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