Swallowtail  (Papilio machaon britannicus)

The British race (britannicus) is found only in the Norfolk Broads, and once had a much wider range, extending throughout the East Anglian Fens, the Somerset Levels, the marshes along the Thames, reaching as far north as Yorkshire (4). These wetland areas have long since been drained. The species was lost from Wicken Fen in Cambridgeshire in the 1950s and attempts at reintroduction have been made, so far with little success (4). The European race (gorganus) has a wide distribution in Europe, extending through Asia to Japan and also occurs in North America (4).

Breeds only in fens and marshes (3).