Swallowtail

Aucune description en français n’est encore disponible.

The British Isles have few endemic species due to past frequent glaciations and because of the proximity to Continental Europe and former land bridges which enabled species to re-colonise the islands from the continent following glaciations. Most endemic taxa to the British Isles are considered to be subspecies of a more widely spread species, with mutations or adaptations slightly changing the species in the islands or in certain localities. British conservationists often describe this as a "wiped clean effect" with repeated glaciations forcing many species out of the modern area of the…

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