Scarce Swallowtail

The outer black bars narrow at different rates, so I resisted making the two forewings into a mirrored pattern. The long hindwing tails needed the same restraint. Each begins within a scalloped margin and continues as a thin dark streamer, while a small blue-and-orange signal sits close to its base. This scarce swallowtail print holds the butterfly in a full dorsal spread, where the pale ground carries more of the composition than the markings. Its measured geometry places the specimen within the studio’s natural-history print catalogue without losing the sense of a butterfly built to glide.

In shortIphiclides podalirius is a large swallowtail of warm parts of Europe and adjoining regions. Broad wings, long tails and hindwing ocelli support a strong gliding flight and a rear-wing decoy. The plate shows one adult from above with all four wings fully spread.

Key Facts

Why is it called the scarce swallowtail?

The name is mainly a British one, because Iphiclides podalirius reaches Britain only as a rare migrant. Across much of southern and central Europe it is an established butterfly, although abundance still changes with region and habitat. The word scarce can therefore mislead readers who assume it describes the whole range. Other English names, including sail swallowtail, point instead to the butterfly’s flight and broad wing shape.

Its distribution extends east through temperate Asia and south into parts of North Africa. Local populations depend on warm breeding sites with larval foodplants, so the species can be frequent on one hillside and absent from a nearby landscape that has lost scrub or old orchard edges. The scientific name avoids that geographic ambiguity. It identifies the same species whether the butterfly is a rarity at the edge of its range or a familiar summer visitor farther south.

How do the tails and eyespots protect a scarce swallowtail?

The tails and hindwing eyespots can redirect a predator’s strike toward the rear of the wing. A bird that attacks the moving streamer or bright ocellus may tear expendable wing tissue instead of reaching the head or thorax. The effect is strengthened by the placement of the blue and orange marking close to the tail base, where it can suggest a false point of attention.

This defence does not make every attack harmless, and worn butterflies often show the cost. A missing tail, clipped margin or torn eyespot may record a failed strike. The living butterfly can continue flying after limited rear-wing damage because the vital organs remain in the body. The markings are not added decoration. They are part of an active visual strategy. The studio’s species cards include a short card for this plate.

What do scarce swallowtail caterpillars eat?

Scarce swallowtail caterpillars feed chiefly on woody plants in the rose family, especially species of Prunus. Blackthorn, plum and cherry are among the hosts recorded across the range. These plants place the butterfly in hedgerows, scrub, orchards and garden edges rather than in open flower meadow alone. Adults can travel widely for nectar, but a breeding site must also provide leaves suitable for the larvae.

The caterpillar is green and rests close to the leaf surface, a very different form from the striped adult. After feeding and growing through several moults, it forms a chrysalis attached to a support by silk. The pupal stage carries the insect through winter in many temperate populations. This dependence on shrubs and fruit trees explains why old orchard mosaics can hold more value than their cultivated appearance suggests. A hedge containing blackthorn may be both a boundary and a nursery.

Why does the scarce swallowtail glide so much?

The scarce swallowtail glides because its broad wings can carry it between bursts of active flapping. It gains height with wingbeats, then holds the wings open and sails along warm slopes, hedges and orchard margins. The long hindwing tails extend the outline but do not drive the flight. Their movement becomes especially visible while the larger wing surfaces remain comparatively steady.

That flight can look slower than the insect’s actual progress. A gliding butterfly covers ground without the rapid flicker associated with many smaller species, then changes direction with a brief adjustment of the wings. The pale ground colour and black bars remain legible during those open-wing moments. This is why the silhouette matters so much in a still study. A closed specimen would preserve the markings, but it would hide the wide shape that gives the sail swallowtail its second English name.

Where and when does Iphiclides podalirius live?

Iphiclides podalirius lives in warm, open country with shrubs and fruit trees. It is associated with orchards, scrubby hillsides, woodland edges, gardens and vineyard margins where larval hosts and adult nectar flowers occur together. The butterfly needs neither dense forest nor treeless grassland. A varied boundary of sunlit vegetation provides more of its requirements than either extreme.

Adults fly from spring into early autumn, but the number of generations changes with climate. Cooler regions may produce one brood, while warmer areas can support two flight periods. The species generally overwinters as a pupa, then emerges when temperature and plant growth allow the cycle to resume. Habitat continuity matters because a strong adult flight cannot replace the loss of blackthorn, plum or other host shrubs. Warmth, nectar and larval foliage must overlap within reach.

Drawing the scarce swallowtail

I posed the butterfly with the wings fully open and the tails extending below the hindwings. The pale cream ground had to remain dominant, so I kept each black bar narrow and allowed it to taper at its own angle. Those bars are not parallel. Their changing widths create the forward pull of the forewings and the softer curve of the lower pair. Blue crescents gather near the scalloped hindwing margins, with an orange ocellus close to each tail base.

The spacing between the bars stays coherent without becoming mechanically symmetrical. The two tails end as separate fine lines, and the small differences between them keep the specimen alive. The body remains narrow between the broad wings, allowing the full outline to carry the composition. A resting photograph often hides part of the upper pattern or shortens the tails through perspective. The hand-drawn digital illustration keeps the dorsal markings, gliding silhouette and complete tail length visible in one view.

Where does a scarce swallowtail print work on a wall?

The broad pale wings suit a study, stairwell, nursery or living room with enough horizontal space around the frame. Thin oak keeps the cream field light, while a narrow black frame repeats the wing bars and tails. The plate belongs to The Naturalist collection and also appears in the children’s room guide, where real specimen structure replaces cartoon insect imagery. In the photograph below, tulip, bee, butterfly and sunflower studies hang in matching frames on a green wall. Equal spacing lets their different silhouettes remain distinct while the shared cream grounds hold the group together.

Fine-art print →

Frequently Asked Questions

Why is the scarce swallowtail not scarce everywhere?

The English name reflects its status in Britain, where it appears only as a rare migrant. The species is established across much of southern and central Europe and continues east into temperate Asia. Local numbers still depend on climate, shrubs and orchard habitat, so widespread does not mean equally common in every part of the range.

What plants do scarce swallowtail caterpillars eat?

The larvae feed mainly on woody members of the rose family, especially Prunus. Blackthorn, plum and cherry are among the recorded hosts. Adults visit flowers for nectar, so a complete breeding landscape needs both larval foliage and flowering plants rather than nectar alone.

What are the blue and orange marks on the hindwings for?

They form a concentrated visual signal beside the long tails. Together they can draw a predator toward the rear edge of the wing and away from the body. A butterfly may survive with a clipped tail or torn margin if the strike misses its head and thorax.

How is a scarce swallowtail different from an Old World swallowtail?

The scarce swallowtail has a pale cream ground crossed by long tapered black bars, very long tails and blue-orange hindwing marks. Papilio machaon has a stronger yellow ground with black veining and a broader dark border. Both are swallowtails, but their wing patterns and proportions are distinct.

How is this print made, and how does it reach me?

There are two formats. The digital download is a high-resolution file that you print yourself, at home or at a print shop; no physical item is shipped. The fine-art print is printed to order on archival paper or canvas, framed or unframed, in sizes from small prints to over 150 cm (60 inches), and delivered to your door.