Iphiclides feisthamelii, the southern scarce swallowtail, southern swallowtail or Iberian scarce swallowtail, is a butterfly found in Italy, Slovenia, southern France, Spain, Portugal, Morocco, Algeria and Tunisia. It is sometimes considered a subspecies of I. podalirius.
The larva feeds on Prunus amygdalus (almond), P. persica (peach), P. insititia (a kind of plum), P. longipes, Pyrus communis (common pear), Malus domesticus (apple) and Crataegus oxyacantha.
After many years being considered a subspecies of the scarce swallowtail I. podalirius this taxon can now be accepted as a full species.
Identification & Similar species: Compared to the scarce swallowtail I. podalirius, this species has a white/ grey-white rather than yellowish ground colour, but sometimes with faint yellow in the female. Markings are also darker, at least in the spring brood. The differences are subtle...
Genetalia are reportedly slightly different and there is some differentiation in mitochondrial DNA.
Distribution & Flight: North Africa, Spain and southwest France. There may be overlap with the scarce swallowtail I. podalirius in some areas particularly as these are mobile butterflies. Flies from March or April to the end of summer in multiple broods.
Habitat & Behaviour: Diverse habitats: scrub, meadows, parks, gardens, coasts to mountains.
This is a most majestic butterfly, huge and floating effortlessly. It is not, as its English name implies, scarce, and in my experience it is much more common than the Swallowtail (Papilio machaon). I believe the English name originates from the early English lepidopterists and refers to its scarcity as a rare vagrant to the UK in the 1800s or thereabouts.
The previously-considered subspecies feisthamelii (English name: Iberian Scarce Swallowtail or Spanish Swallowtail) is now classified as a separate species. It is principally an Iberian species with distribution "spilling" into the eastern Pyrénées of France (http://diatheo.weebly.com/iphiclides-feisthamelii.html). It differs from podalirius in that it is noticeably paler, white in the male, and pale yellow in the female.
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