Hybrids: When two species become three - life - 15 June 2006 - New Scientist: "SPECIES do not always arise by new branches forming on the family tree. Sometimes the branches merge, and two species hybridise to form a third."
When two butterflies become one new one - life - 01 December 2006 - New Scientist: "A new butterfly species that lives high in the Sierra Nevada mountains of the western US has turned out to be a rare creature indeed: it arose through the merging of two distinct species. It is one of very few hybrid species that can successfully breed."
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