Tropical birds are purported to be longer lived than their temperate counterparts, but it has not been shown whether avian survival rates covary with latitude worldwide. Here, we perform a global‐scale meta‐analysis of 949 estimates from 204 studies of avian survival and demonstrate that a latitudinal survival gradient exists in the northern hemisphere, is dampened or absent for southern hemisphere species, and that differences between passerines and nonpasserines largely drive these trends. We also show that while extrinsic factors related to climate were poor predictors of apparent survival compared to latitude alone, the relationship between apparent survival and latitude is strongly mediated by intrinsic traits – large‐bodied species and species with smaller clutch size had the highest apparent survival. Our findings reveal that differences among intrinsic traits and whether species were passerines or nonpasserines surpass latitude and its underlying climatic factors in explaining global patterns of apparent avian survival.

中文翻译：

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对跨物种和纬度的全球鸟类生存进行的荟萃分析。

据称热带鸟类的寿命比温带鸟类更长，但是尚未证明禽类的存活率是否随全球纬度的变化而变化。在这里，我们对204项鸟类生存研究进行了949项估计值的全球荟萃分析，并证明北半球存在纬度生存梯度，南半球物种被抑制或不存在，并且雀形目和非雀形目之间的差异很大推动这些趋势。我们还显示，尽管与气候相关的外在因素与单独的纬度相比，表观生存的预测能力较差，但表观生存和纬度之间的关系强烈地由内在特征介导–大体物种和离合器尺寸较小的物种具有最高的表观生存率。