Eurasian jays have been reported to protect their caches by responding to cues about either the visual perspective or current desire of an observing conspecific, similarly to other corvids. Here, we used established paradigms to test whether these birds can - like humans - integrate multiple cues about different mental states and perform an optimal response accordingly. Across five experiments, which also include replications of previous work, we found little evidence that our jays adjusted their caching behaviour in line with the visual perspective and current desire of another agent, neither by integrating these social cues nor by responding to only one type of cue independently. These results raise questions about the reliability of the previously reported effects and highlight several key issues affecting reliability in comparative cognition research.

中文翻译：

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几乎没有证据表明欧亚松鸦通过回应有关同种的欲望和视觉视角的线索来保护它们的藏匿处

据报道，欧亚松鸦通过响应有关观察同种的视觉视角或当前欲望的线索来保护它们的藏匿处，类似于其他鸦科动物。在这里，我们使用已建立的范例来测试这些鸟类是否可以像人类一样整合关于不同心理状态的多个线索并相应地执行最佳反应。在五个实验中，其中还包括以前工作的复制，我们发现几乎没有证据表明我们的松鸦根据另一个代理的视觉视角和当前愿望调整了它们的缓存行为，既不是通过整合这些社交线索，也不是通过仅响应一种类型的独立提示。