Species delimitation is fundamental to biology, but disagreement in species concepts and the application of those concepts can lead to substantial variation in species lists, with important implications for conservation. For birds, there are four widely used global checklists that vary in length and application. Here, we investigate the biogeographical and ecological predictors of taxonomic disagreement between the four world bird species lists.

中文翻译：

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世界鸟类分类学不和谐的生态和生物地理预测因子

物种划界是生物学的基础，但是物种概念上的分歧和这些概念的应用会导致物种清单的实质性变化，这对保护意义重大。对于鸟类，有四个广泛使用的全局清单，它们的长度和用途各不相同。在这里，我们研究了四种世界鸟类清单之间生物分类学差异的生物地理和生态预测因子。