The Living Canvas
botanical art through the ages
Swallowtail butterflies have appeared in natural history illustration for as long as systematic illustration has existed, and the reasons are straightforward: the family Papilionidae includes some of the largest, most visually complex, and most ecologically specific insects in the world. The characteristic hindwing tails that give the family its common name, the yellow-and-black patterning of species like Papilio machaon, and the intimate dependency of swallowtail caterpillars on specific host plants make these butterflies ideal subjects for the kind of precise, ecologically contextual illustration that the natural history tradition most values. From Maria Sibylla Merian’s 1705 Suriname plates through to contemporary entomological illustration, swallowtails have been among the most documented insects in the history of natural history art.
The family Papilionidae contains approximately 600 species worldwide. The Old World swallowtail (Papilio machaon), named by Linnaeus in 1758, is the most widely distributed swallowtail species and one of the most frequently illustrated insects in European natural history. Its caterpillar feeds almost exclusively on plants in the carrot family (Apiaceae) — a host-plant specificity that makes it a natural subject for the botanical-entomological illustration tradition founded by Merian.
| Family | Papilionidae · approximately 600 species worldwide |
| Common name origin | Hindwing extensions resembling a swallow’s forked tail |
| Key species in art | Papilio machaon (Old World swallowtail) · Papilio ulysses (Ulysses butterfly) · Ornithoptera spp. (birdwings) |
| Host plants | P. machaon: Apiaceae (carrot family) · species-specific dependencies throughout family |
| First systematic illustration | Merian, Metamorphosis Insectorum Surinamensium (1705) — tropical swallowtails with host plants |
| Linnaeus name | Papilio machaon named 1758 · British subspecies britannicus now Vulnerable |
| Conservation status | British machaon britannicus: restricted to Norfolk Broads · fewer than 1,000 individuals |
Swallowtails and the Ecological Illustration Tradition
The botanical-entomological illustration tradition that Maria Sibylla Merian founded is built on exactly the kind of relationship that swallowtail butterflies exemplify. Swallowtail caterpillars are highly specific about their host plants — each species typically feeds on a narrow range of plant families, and many species are dependent on a single genus or family. Papilio machaon in Europe feeds almost exclusively on Apiaceae (the carrot and parsley family); tropical swallowtails in the Papilio and Graphium genera show similarly tight host-plant specificities.
This host-plant specificity makes swallowtails ideal subjects for the kind of ecological illustration Merian pioneered: the plate that shows both the butterfly and its host plant, across the complete metamorphic sequence from egg to adult, is simultaneously a botanical illustration and an entomological one. The plant and the insect are shown in their actual ecological relationship, not as separate subjects from different disciplines placed together for compositional effect. Merian’s Suriname plates include several swallowtail species precisely because they exemplified this relationship with unusual clarity.
The History of Swallowtail Illustration
Swallowtail butterflies appear in European art well before systematic natural history illustration — in medieval manuscript marginalia, in Dutch Golden Age still life compositions, in decorative contexts across many cultures. But their significance in the natural history illustration tradition begins specifically with the post-Linnaean period, when systematic entomology provided a framework that gave illustration a scientific purpose beyond documentation of individual curiosities.
Moses Harris’s The Aurelian (1766) — the first comprehensive illustrated work on British butterflies and moths — included Papilio machaon among its subjects, producing plates that combined artistic quality with the morphological accuracy that Linnaean systematics required. The work established a tradition of British butterfly illustration that ran through the Victorian period’s explosion of natural history publishing, when colour printing made illustrated entomological works accessible to audiences beyond specialist collectors.
The tropical swallowtails — particularly the birdwings (genus Ornithoptera) of New Guinea and northern Australia, and the brilliant blue Ulysses butterfly (Papilio ulysses) — presented illustration challenges of their own. The iridescent blues of Papilio ulysses and the structural colour of the birdwings are produced by light interference rather than pigment, making them notoriously difficult to render accurately in watercolour. The golden age illustrators’ solutions to this problem — using metallic pigments, exploiting vellum’s translucency, careful layering of transparent washes — are among the more technically sophisticated achievements in the history of the discipline.
Papilio machaon: The Species and Its Conservation Status
The Papilio machaon article on this site discusses the Old World swallowtail in detail. The species was named by Linnaeus in 1758, making it one of the first insects to receive a binomial name under the Linnaean system. It is the most widely distributed swallowtail in the Palearctic region and has been a subject of natural history illustration continuously since Merian’s time.
The British subspecies britannicus is now restricted to the Norfolk Broads and numbers fewer than 1,000 individuals — a dramatic decline from a distribution that once covered much of southern England. The caterpillar’s dependence on milk parsley (Peucedanum palustre), a wetland plant of fens and marshes, ties its survival directly to the availability of a specific botanical habitat. This is the ecological relationship that Merian’s illustration tradition documented: when the host plant goes, the butterfly goes too. Conservation illustration that shows both species in their relationship is not merely documentation but argument.
Swallowtails in Contemporary Natural History Art
Contemporary natural history illustration continues to use swallowtails as subjects precisely because the challenges they present — structural colour, complex wing patterning, the need to show the ecological relationship with host plants — push illustrative technique in useful directions. The Society of Botanical Artists and the natural history illustration programmes at major British and American art schools regularly feature swallowtail subjects in competitive exhibitions, both as technical exercises and as opportunities to engage with the conservation arguments that accurate ecological illustration supports.
The connection between swallowtail illustration and the broader botanical illustration tradition is not incidental. The host-plant specificity of swallowtail caterpillars means that illustrating the butterfly accurately requires illustrating its host plant accurately — the two subjects are inseparable in the ecological sense, as Merian understood in 1705. A swallowtail illustration that omits the host plant is incomplete in the same way that a botanical illustration that omits the flower is incomplete: it shows part of what the organism is but not all of it.
FAQ
Why are swallowtail butterflies so frequently illustrated in natural history art?
Three reasons: their visual complexity (large size, distinctive tails, intricate wing patterning that presents genuine technical challenges), their host-plant specificity (which makes them natural subjects for the ecological illustration tradition Merian founded — showing insect and host plant together), and their wide geographical distribution across every continent except Antarctica (which means every tradition of natural history illustration has encountered them).
What makes swallowtail butterflies technically difficult to illustrate?
The structural colour of many tropical species — particularly the iridescent blues of Papilio ulysses and the metallic greens of birdwings — is produced by light interference rather than pigment, making it behave differently under different lighting conditions and impossible to replicate with standard watercolour pigments. Golden age illustrators used metallic pigments, vellum translucency, and layered transparent washes to approximate the effect. The complex geometric patterning of temperate species like machaon requires precise draughtsmanship to reproduce accurately at any scale.
What is the conservation status of the British swallowtail?
The British subspecies Papilio machaon britannicus is now restricted to the Norfolk Broads, where it depends on milk parsley (Peucedanum palustre) as its sole caterpillar host plant. Population estimates suggest fewer than 1,000 individuals. The decline from a former distribution across much of southern England reflects the drainage and agricultural conversion of the fens and marshes where milk parsley grows. It is classified as Vulnerable in the UK.
What is the connection between swallowtails and the Merian illustration tradition?
Maria Sibylla Merian’s founding contribution to natural history illustration was the systematic documentation of insects together with their host plants across complete metamorphic sequences. Swallowtail butterflies exemplify this relationship particularly clearly because their caterpillars are highly specific about host plants — many species dependent on a single plant family. The swallowtail-on-host-plant illustration is the clearest possible demonstration of Merian’s ecological approach.
Where can I read more about swallowtails in botanical illustration?
The Papilio machaon article on this site covers the Old World swallowtail in detail. The broader natural history illustration tradition — including Merian’s founding ecological approach — is explored in The Living Canvas: A Journey Through Botanical Art, History & Modern Life, available at Amazon.com/dp/B0GHTD913P. Browse the Fiurdelin collection.
The Insect That Requires a Botanical Illustration
Swallowtail butterflies are natural subjects for botanical illustration not despite but because of their host-plant specificity. To illustrate the butterfly completely — to show what it is and how it lives — requires illustrating the plant it depends on. This ecological inseparability is what Merian understood when she showed caterpillars on their food plants in 1705, and what conservation illustrators understand when they document threatened species alongside the specific botanical habitats they require. The full history of this tradition is traced in The Living Canvas: A Journey Through Botanical Art, History & Modern Life, available at Amazon.com/dp/B0GHTD913P. Browse the Fiurdelin collection.
