British swallowtail split from European cousins much earlier than thought, study finds

"Groundbreaking Study Reveals Ancient Origins of Rare Norfolk Butterfly: Conservation Efforts Set for a Major Overhaul. A groundbreaking study has shed new light on the origins of the endangered swallowtail butterfly, Papilio machaon britannicus, which is found exclusively breeding in the Norfolk Broads. Contrary to previous assumptions, researchers have discovered that this unique subspecies has been distinct for at least 200,000 years, far longer than initially thought. This remarkable finding has significant implications for conservation efforts, which may need to be reevaluated in light of the butterfly's ancient and deep-rooted history in the region."

Finding that Norfolk butterfly has been distinct subspecies for 200,000 years could transform conservation approachThe endangered swallowtail butterfly Papilio machaon britannicus, which is only regularly found breeding in Britain on the Norfolk Broads, has been a distinct subspecies for at least 200,000 years, according to a study.Smaller, darker in colour and much rarer than the continental swallowtail, britannicus was previously considered to have developed its distinctive form during its confinement in the wetlands of eastern England over the last 8,000 years, after the flooding of Doggerland. Continue reading...