Wolves (Canis lupus), coyotes (Canis latrans), and domestic dogs (Canis familiaris) are all separate species. Although there are times in which the species interbreed this is because of the fact that all of the species are similar enough. The article mentions that even modern humans today have some traces of Homo neaderthalensisas well as Denisova homininsgenes mixed in their genomes. The fact that they can interbreed with one another does not make them a single species. Their interbreeding occurs when there is not enough of one species in the area and what this leads to is more variation among the species. Although wolves, coyotes, and domestic dogs share very similar genes there still is enough variation to make them separate species.
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