Taxonomy
Studies by Arnaiz-Villena et al. have examined the evolutionary relationships of the genus Passer with other members of the family Passeridae, and of members of the genus in relation to each other. According to a study by Arnaiz Villena et al. published in 2001, the genus originated in Africa and Cape Sparrow is the most basal lineage. The particular lineages within the genus, such as the House Sparrow and other Palaearctic black-bibbed sparrows, likely originate from radiations from southern and western Africa.
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