For a prey, its best ticket to stay alive is to get early and accurate information on predation risk and so, escape from predation at low cost. Some prey species have evolved the ability to eavesdrop signals intended for others, which contain information on predation risk. This is the case for the vocalizations produced by prey species when interacting with predators. Although primarily studied in birds and mammals, eavesdropping on vocal signals has been recorded in some lizard species. Here, we explored whether the lizard Liolaemus lemniscatus eavesdrops on the distress calls of its sympatric species, the Weeping lizard (L. chiliensis). Individuals of the Weeping lizard respond to these calls by displaying antipredator behaviours (i.e., reduced movement), and individuals of L. lemniscatus may potentially display similar defences if they decode the information contained in these calls. Our playback experiments showed that individuals of L. lemniscatus responded to the sound stimuli (distress calls and white noise), reducing their activity, but they did not discriminate between these two stimuli, suggesting that L. lemniscatus does not eavesdrop on the distress calls of its sympatric lizard species. We discuss some hypotheses to explain the lack of eavesdropping by L. lemniscatus on the Weeping lizard distress calls.

中文翻译：

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Liolaemus lemniscatus 是否会窃听同域哭泣蜥蜴的求救信号？

对于猎物来说，要想活下去，最好的办法就是尽早获得关于捕食风险的准确信息，从而以低成本逃离捕食。一些猎物物种已经进化出窃听其他人的信号的能力，其中包含有关捕食风险的信息。猎物与捕食者互动时发出的声音就是这种情况。虽然主要在鸟类和哺乳动物中进行研究，但在一些蜥蜴物种中已经记录了对声音信号的窃听。在这里，我们探讨了蜥蜴 Liolaemus lemniscatus 是否会窃听其同域物种哭泣蜥蜴 (L.chiliensis) 的求救信号。哭泣蜥蜴的个体通过表现出反捕食者的行为（即减少运动）来响应这些呼叫，而 L. 如果 lemniscatus 解码这些调用中包含的信息，它们可能会显示类似的防御。我们的回放实验表明，L. lemniscatus 个体对声音刺激（遇险呼叫和白噪声）做出反应，减少了他们的活动，但他们没有区分这两种刺激，表明 L. lemniscatus 不会窃听其遇险呼叫它的同域蜥蜴物种。我们讨论了一些假设来解释 L. lemniscatus 没有对哭泣的蜥蜴求救电话进行窃听。lemniscatus 不会窃听其同域蜥蜴物种的求救信号。我们讨论了一些假设来解释 L. lemniscatus 没有对哭泣的蜥蜴求救电话进行窃听。lemniscatus 不会窃听其同域蜥蜴物种的求救信号。我们讨论了一些假设来解释 L. lemniscatus 没有对哭泣的蜥蜴求救电话进行窃听。