Diverse animal species engage in long-distance migrations. Many migrants travel in groups, and communication within these groups may be important to survival and successful migration. We examined migration and communication in 36 species of wood warblers (Parulidae), songbirds which breed in North America and migrate in mixed-species flocks to their wintering grounds. During migration, wood warblers produce short vocalizations called "flight calls." The function of flight calls and the patterns of acoustic similarity between species are poorly understood. We investigated whether acoustic similarity of flight calls of different species of warbler reflects the similarity in their migratory journeys or their phylogenetic relatedness. We found that phylogeny, similarity in breeding latitude, and overlap in the timing of migration predict acoustic flight call similarity across warbler species. Further, we found that phylogeny, similarity in migration distance, and overlap in wintering range predict acoustic flight call similarity in a subset of 12 species with highly similar calls, although this analysis has a small sample size. We conclude that migratory similarity may be an important force driving the evolution of acoustically similar calls in wood warblers, in addition to phylogenetic relatedness. Acoustic convergence in these species may facilitate communication between individuals with similar migrations. This article is protected by copyright. All rights reserved.

中文翻译：

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Wood Warbler 飞行叫声的演变：具有相似迁徙的物种发出声学上相似的叫声

不同的动物物种进行长距离迁徙。许多移民成群结队地旅行，这些群体内的交流可能对生存和成功移民很重要。我们检查了 36 种林莺（Parulidae）的迁徙和交流，这些鸣禽在北美繁殖并以混合物种群迁徙到越冬地。在迁徙期间，林莺会发出短促的叫声，称为“飞行叫声”。飞行呼叫的功能和物种之间的声学​​相似性模式知之甚少。我们调查了不同种类莺的飞行叫声的声学相似性是否反映了它们迁徙旅程的相似性或它们的系统发育相关性。我们发现系统发育、繁殖纬度的相似性、和迁移时间的重叠预测了莺物种之间的声学​​飞行呼叫相似性。此外，我们发现系统发育、迁移距离的相似性和越冬范围的重叠预测了 12 个具有高度相似呼叫的物种子集中的声学飞行呼叫相似性，尽管该分析的样本量很小。我们得出结论，除了系统发育相关性之外，迁徙相似性可能是推动林莺声学相似呼叫进化的重要力量。这些物种的声学收敛可能会促进具有相似迁徙的个体之间的交流。本文受版权保护。版权所有。和越冬范围的重叠预测了具有高度相似叫声的 12 种物种的声学飞行叫声相似性，尽管该分析的样本量很小。我们得出结论，除了系统发育相关性之外，迁徙相似性可能是推动林莺声学相似呼叫进化的重要力量。这些物种的声学收敛可能会促进具有相似迁徙的个体之间的交流。本文受版权保护。版权所有。和越冬范围的重叠预测了具有高度相似叫声的 12 种物种的声学飞行叫声相似性，尽管该分析的样本量很小。我们得出结论，除了系统发育相关性之外，迁徙相似性可能是推动林莺声学相似呼叫进化的重要力量。这些物种的声学收敛可能会促进具有相似迁徙的个体之间的交流。本文受版权保护。版权所有。这些物种的声学收敛可能会促进具有相似迁徙的个体之间的交流。本文受版权保护。版权所有。这些物种的声学收敛可能会促进具有相似迁徙的个体之间的交流。本文受版权保护。版权所有。