Swallowtail · Papilio machaon
Fiurdelin botanical collection
The Machaon butterfly — Papilio machaon, the Old World swallowtail — has been drawn, painted, and collected by naturalists and artists for over three centuries. Its wingspan reaches up to nine centimetres, with bright yellow wings adorned with bold black veining, iridescent blue marginal spots, and the characteristic tail extensions that give swallowtails their name. Few insects in the temperate world offer a botanical and entomological illustrator a more demanding or more rewarding subject.
Papilio machaon was named by Carl Linnaeus in 1758 after Machaon, the healer in Greek mythology. It is one of the most widely distributed butterflies in the world, found across Europe, North Africa, Asia, and North America. The British subspecies britannicus, restricted to fenland habitats in Norfolk, is classified as Vulnerable.
| Scientific name | Papilio machaon Linnaeus, 1758 |
| Common names | Old World swallowtail · Common swallowtail · Machaon butterfly |
| Wingspan | 65–86 mm |
| Distribution | Europe, North Africa, temperate Asia, western North America |
| UK subspecies | britannicus — restricted to Norfolk Broads; classified Vulnerable |
| Host plants | Fennel, wild carrot, milk parsley, rue — Apiaceae family |
| Mythology | Named after Machaon, healer and son of Asclepius in Greek mythology |
The Machaon Butterfly in Natural History Illustration
The Old World swallowtail appears in the earliest systematic attempts to document European insects alongside their host plants. Maria Sibylla Merian’s approach to illustrating insects across their complete life cycles — caterpillar, chrysalis, adult — with their food plants established the documentary standard that entomological illustration has followed since 1705. The machaon’s relationship with its host plants is particularly well-suited to this approach: the caterpillar’s striking appearance (green and black banded, with orange-spotted warning colouration) is visually distinct from the adult, and the fennel, wild carrot, and milk parsley on which it feeds provide strong compositional material alongside the butterfly itself.
Illustrating Papilio machaon requires decisions that are characteristic of entomological illustration more broadly. The wings shown spread or at rest? At what angle? Which subspecies, given the variation across the butterfly’s enormous range? The British britannicus shows heavier black markings than continental populations; the Asian subspecies display differently proportioned tail extensions. Each decision is a scientific decision as much as a compositional one — which is why the best natural history illustration of this species shows multiple views and stages rather than a single definitive image.
Distribution and the British Population
Papilio machaon is one of the most widely distributed butterflies in the world, found from the Atlantic coast of Europe across temperate Asia into western North America. Across this range it has adapted to an enormous variety of habitats, from alpine meadows to coastal fenland to steppe grassland, always tied to the Apiaceae — the carrot family — on which its larvae depend.
The British population tells a different story. The subspecies britannicus is now restricted almost entirely to the Norfolk Broads, where its specialist habitat — wet fenland dominated by milk parsley — still exists. It was once present across the fens of East Anglia; agricultural drainage progressively eliminated the habitat until only the Broads population remained. The subspecies is now classified as Vulnerable and is the subject of ongoing conservation management. Occasional migrants from the continent appear elsewhere in Britain, but these are a different subspecies and do not establish permanent colonies.
The conservation status of britannicus gives the natural history illustration tradition a direct contemporary relevance. Documenting a subspecies under pressure from habitat loss is exactly the kind of work that Margaret Mee was undertaking in the Amazon — work whose scientific value increases as the subjects become rarer. A careful illustration of P. m. britannicus made now is a primary record of a population that may not survive the century in its current form.
The Caterpillar: A Subject as Striking as the Adult
The mature caterpillar of Papilio machaon is one of the most visually striking larvae in the British fauna — green with black bands across each segment, each band spotted with orange, and a retractable orange forked organ (the osmeterium) behind the head that releases a pungent scent when the caterpillar is threatened. The colouration is aposematic: the orange and black pattern signals distastefulness to predators, though the caterpillar is not in fact toxic.
For an illustrator, the caterpillar presents a different set of challenges from the adult. The segmented cylindrical form requires careful handling of the cylindrical surface — the pattern wraps around the body in a way that a photograph, taken from one angle, cannot fully show. The illustration, by showing multiple views, can convey the complete colouration more clearly than any photograph. This is the core argument for why entomological illustration has persisted alongside photography: certain structural and pattern information is better conveyed by a decision about what to show than by a record of what the camera captured.
Mythology and Cultural History
Carl Linnaeus named Papilio machaon after Machaon, the healer in Greek mythology — son of Asclepius, the god of medicine, and brother of Podalirius. Machaon was a physician at Troy, treating the wounds of heroes. The name given to a butterfly associated with the fennel and carrot plants that were themselves used medicinally in classical antiquity was not chosen arbitrarily.
The butterfly’s broader cultural significance draws on associations common to butterflies across many traditions. In ancient Greek, psyche meant both butterfly and soul — the three-stage metamorphosis of caterpillar, chrysalis, and adult provided a natural template for ideas of death and resurrection that appeared in Greek, early Christian, and later European symbolic traditions. In Japanese and Chinese cultures, the butterfly carries associations with longevity, joy, and the souls of the departed. The machaon, as the most striking butterfly of the temperate world, accumulated these associations more readily than most.
The Machaon as an Illustration Subject Today
Working on the Fiurdelin Papilio machaon study, the primary challenge was the wings — specifically, the relationship between the black veining and the yellow ground colour, which in the actual butterfly has a quality of translucency that watercolour on paper can approach but not fully replicate. The marginal blue spots at the trailing edge of the hindwing have an iridescent quality that shifts between blue and violet depending on the angle of the light. Getting both qualities onto the page simultaneously requires the kind of observation that the tradition of pre-photographic natural history illustration developed as a systematic discipline: multiple specimens, multiple sessions, careful notes about colour under different lighting conditions.
The result is an illustration that shows the butterfly as a subject worthy of the same sustained attention that botanical illustration gives to plants — which is what the natural history illustration tradition has always argued, from Merian’s insect-with-host-plant compositions to Booth’s microscopic work. The machaon is not a decorative pattern. It is a complex living organism with a life cycle, a host plant relationship, a conservation status, and a three-century documentary history. The illustration that does it justice shows all of that, not just the wings.
FAQ
What is the Machaon butterfly and where does it live?
Papilio machaon, the Old World swallowtail or Machaon butterfly, is one of the most widely distributed butterflies in the world, found across Europe, North Africa, temperate Asia, and western North America. It has a wingspan of 65–86 mm, with yellow wings marked by bold black veining, blue marginal spots, and characteristic tail extensions. In Britain it survives as a single subspecies (britannicus) restricted to the Norfolk Broads, where it is classified as Vulnerable.
Why is the British Machaon butterfly population so small?
The British subspecies britannicus depends on milk parsley in wet fenland habitats. Agricultural drainage of East Anglian fens across the nineteenth and twentieth centuries progressively eliminated this habitat until only the Norfolk Broads population remained. The subspecies is now managed as a conservation priority, with habitat maintenance and population monitoring ongoing.
What plants does the Machaon butterfly depend on?
The larvae feed almost exclusively on plants of the Apiaceae (carrot family) — fennel, wild carrot, milk parsley, rue, and related species depending on region. In Britain, the primary host plant is milk parsley (Thyselinum palustre), which grows in the wet fenland habitats the subspecies occupies. Continental populations use a wider range of Apiaceae species.
Why is Papilio machaon a significant subject for natural history illustration?
The machaon has been a subject of systematic natural history illustration since the eighteenth century, when Linnaeus named it and illustrators began documenting its life cycle alongside its host plants. The British subspecies’s conservation status gives contemporary illustration a direct documentary value — precise records of its colouration, life stages, and host plant associations contribute to the scientific understanding needed for conservation management.
Where can I find Papilio machaon prints for my home?
The Fiurdelin Papilio machaon illustration is available as a print through the Fiurdelin botanical collection, showing the adult butterfly with the detail and accuracy of the natural history illustration tradition. Browse the Fiurdelin collection for butterfly and botanical prints made in this observational tradition.
An Ancient Subject Still Worth Drawing
The Machaon butterfly has been a subject of natural history illustration for as long as systematic illustration of European insects has existed. It rewards the practice for the same reasons it has always done: the colouration is genuinely complex, the life cycle is visually distinct at every stage, and the relationship with its host plants places it within the broader tradition of plant-and-insect documentation that defines the best natural history illustration. The Fiurdelin Papilio machaon print is available through the Fiurdelin collection — botanical and natural history illustrations made in the tradition that this butterfly helped establish.
