Oceanic islands have often been colonized by small groups of individuals dispersing from the nearest mainland, giving rise to insular populations characterized by locally adapted phenotypes and low genetic diversity. Alternatively, due to past geo‐climatic changes, the present‐day distribution of the species may not correspond to that found at the time of the original colonization so that the current mainland distribution may not include the original source area, leading to erroneous assumptions regarding colonization history. Here, we use patterns of genetic variation to evaluate alternative colonization scenarios of an insular passerine in the Canary Islands.

中文翻译：

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过去的联系的幽灵：在大陆隔离中，在孤立的红嘴红嘴鸦种群中扮演的角色（Aves：Corvidae）

大洋岛屿经常被从最近的大陆散布的一小群人殖民，从而形成了以局部适应的表型和低遗传多样性为特征的岛屿人口。另外，由于过去的地球气候变化，该物种的当前分布可能与原始定殖时的分布不符，因此当前的大陆分布可能不包括原始来源区域，从而导致关于殖民历史。在这里，我们使用遗传变异的模式来评估加那利群岛的岛形雀形目鸟的定居场景。