The Common Lascar Butterfly Explained

The common lascar (Pantoporia hordonia) is an orange-and-black banded brush-footed butterfly of Indian forests, recognised by its flap-and-glide sailing flight along shaded paths and clearings. Its wings are dark brown to black with broad bands of orange-brown, and the pattern gives it a close resemblance to the sailer butterflies of the genus Neptis.

The common lascar is found across a wide stretch of India, from the Western Ghats and peninsular forests to the Himalayan foothills and the north-east. This explainer covers how to identify the common lascar, where it lives, which plants its caterpillars use, how it behaves and how it differs from look-alike species. It was last reviewed on 30 October 2026.

Key Takeaways

• The common lascar (Pantoporia hordonia) is a medium-small butterfly with orange-brown bands on dark wings, belonging to the brush-footed family Nymphalidae.
• The common lascar is found in forests and forest edges across peninsular India, the Western Ghats, the Himalayan foothills and the north-east.
• Common lascar caterpillars feed on leguminous trees and climbers in the pea family (Fabaceae), including species of Senegalia (Acacia).
• The common lascar flies with a few quick wing beats followed by a glide, a style often called sailing.
• The common lascar closely resembles several sailers of the genus Neptis, so careful attention to wing bands and hindwing pattern is needed to tell them apart.
• The common lascar is widespread and not regarded as threatened, but it depends on wooded habitat and its legume host plants.

What is the common lascar butterfly?

The common lascar is a forest butterfly in the family Nymphalidae, belonging to the scientific genus Pantoporia, which is closely related to the sailers of the genus Neptis. Its scientific name is Pantoporia hordonia, and it is one of the more frequently seen woodland butterflies in India.

The word lascar comes from a term used in South Asia and the Indian Ocean world for sailors and soldiers, and it entered English through colonial-era maritime usage. The butterfly’s name is usually linked to the sailing, gliding style of its flight, which fits the sailor idea. Related species in the same group are also called lascars, such as the extra lascar.

Among butterfly watchers in India, the common lascar is valued because it is relatively easy to find on forest paths and because it offers a good lesson in telling apart species whose patterns look alike at first glance.

How do you identify a common lascar?

A common lascar is identified by its dark brown to black wings crossed by orange-brown bands, together with a sailing flight and flat-winged resting posture. The upperside shows a band across the forewing and a band across the hindwing, bordered by dark edges.

Upperside pattern

On the upperside, orange-brown streaks and bands run across both pairs of wings against a darker ground. The pattern looks like a layered arrangement of curved stripes, and there is often a dark outer border on each wing. In bright sunlight the orange tone appears warm and fairly rich.

Underside pattern

On the underside, the colours are paler and more muted, with brownish-orange and white or cream markings. The underside is useful for confirmation, because several similar butterflies differ mainly in underside markings.

Size and body

The wingspan of the common lascar is generally a little under 6 cm, so it is a modest-sized butterfly. The body is slim and dark, and the wings are fairly rounded, giving it a compact, neat outline when perched.

Where does the common lascar live in India?

The common lascar lives across forested and wooded regions of India, including the Western Ghats, peninsular India, the Himalayan foothills and the north-east, and it also occurs in Sri Lanka and parts of South-East Asia. The butterfly favours places with trees, shade and nearby legume plants.

Typical places to find the common lascar include:

• Forest paths and roads where light falls in patches
• Edges of moist deciduous and evergreen forest
• Scrub forest and wooded hill slopes
• Well-wooded gardens, campuses and plantations close to forest

The common lascar is less likely in very dry, treeless landscapes or in dense urban zones with little tree cover. It prefers to stay in or near the shade of trees, so a walk along a shaded forest trail is a more promising way to find one than a sunny open field.

What do common lascar caterpillars eat?

Common lascar caterpillars feed on leguminous trees and climbers in the pea family (Fabaceae), and species of Senegalia (formerly placed in Acacia) are among the plants recorded as larval food. The female lays her eggs on the leaves of suitable host plants, and the caterpillars feed on the foliage.

A host plant is a species that a particular butterfly’s caterpillars are able to eat. The range of the common lascar therefore follows the availability of its host plants, along with shade and humidity. When host trees and climbers are cleared from an area, the common lascar usually declines there.

The caterpillars of the Neptis-group butterflies are known for their well-camouflaged appearance, often resting on leaf tips and looking like part of the plant. Those of the common lascar follow the same general strategy of staying hidden and still during the day.

How does the common lascar fly and behave?

The common lascar flies in a flap-and-glide pattern, taking a few rapid wing beats and then sailing on flat, outspread wings. This sailing flight is characteristic of the Neptis and lascar group and helps observers recognise the butterfly even from a distance.

Perching and basking

The common lascar commonly rests on leaves in dappled light, with its wings opened flat. This posture lets the butterfly absorb warmth and also displays its bands to others of its kind. It tends to return to the same perch after being disturbed.

Feeding habits

Adults visit flowers at times, but they are better known for settling on damp ground, animal droppings and rotting material. These sources supply salts and minerals as well as moisture, and the behaviour is called mud-puddling.

Activity pattern

The common lascar is active in the warmer part of the day and is usually most visible in the late morning and afternoon on bright, humid days. On dull or cool days it is less often seen.

What is the life cycle of the common lascar?

The common lascar passes through egg, caterpillar, pupa and adult stages, as all butterflies do. The female lays eggs on the leaves of host legumes, the caterpillars grow through several moults, and the full-grown caterpillar then changes into a suspended pupa, from which the adult emerges.

• Egg: laid on the host plant leaf, usually singly
• Caterpillar: feeds on legume foliage and grows through several stages
• Pupa: a chrysalis hanging from the plant, often camouflaged
• Adult: a flying stage that mates, feeds and lays the next generation of eggs

In warm, humid areas the common lascar can have several broods in a year, so the timing of adults depends on local rainfall and plant growth rather than on a single fixed season.

When is the best time to see the common lascar?

The best time to see the common lascar is during and after the monsoon, when forests are green and host plants carry fresh leaves. Across peninsular India and the Western Ghats, the period from the rains to the early cool season often brings the largest numbers of adults.

In the warm, humid regions of the north-east and the Himalayan foothills, the butterfly may be encountered through much of the year, with the usual dips in cold or very dry spells. Mornings and afternoons on sunny days between showers usually give the best chance.

How is the common lascar different from similar butterflies?

The common lascar differs from similar sailers mainly in its orange-brown banding, the exact arrangement of bands on the forewing and hindwing, and its flight. Because many Neptis species and other lascars are alike, a close look at the pattern is required.

The extra lascar (Pantoporia sandaka) is a close relative whose range overlaps with the common lascar in parts of India. A good photograph of the underside and of the band pattern on both wings is the surest way to separate these species.

Is the common lascar butterfly threatened?

The common lascar is not regarded as a threatened butterfly, because it is widespread and uses common legume host plants. Even so, the species depends on woodland cover, so large-scale clearing of trees and scrub can reduce local numbers.

The butterfly benefits from habitat that includes native leguminous trees and climbers, shaded paths and areas free of heavy pesticide use. Parks, forest reserves and well-planted campuses can all help maintain populations. In India, wild butterflies are covered by wildlife protection rules, so watching and photographing them is the proper approach rather than collecting them.

How can you watch common lascars responsibly?

You can watch common lascars responsibly by walking quietly along forest paths, scanning leaves in dappled light and photographing from a distance without touching the animal or its plants. Patience is more productive than chasing, since the butterfly often returns to the same perch.

• Look at leaf surfaces in patches of sun along the trail, where lascars bask.
• Photograph wings both open and closed to record the upperside and underside.
• Note the date, location and habitat to make the record useful for local checklists.
• Avoid damaging host plants or trampling vegetation near the path.

Why does the common lascar matter to forest ecology?

The common lascar matters to forest ecology because it is both a consumer of leguminous plants and a food source for other animals. Its caterpillars feed on leaves in small numbers, and the adults, eggs and pupae are eaten by birds, lizards, spiders and parasitic insects, which makes the butterfly one link in a larger woodland food web.

Adult lascars also take part in nutrient movement at a small scale. By drinking from damp soil, droppings and decaying matter, they recycle minerals that would otherwise stay locked in those sources. Their presence, together with that of other woodland butterflies, gives naturalists a simple way to monitor the condition of forest edges across seasons and years.

Citizen records of the common lascar, with dates and places, are valuable because the butterfly is easy to photograph and widespread. Such records show when adults appear in different regions and how the pattern shifts with rainfall.

Bottom Line

The common lascar is a widespread orange-and-black banded forest butterfly of India, identified by its flap-and-glide sailing flight and flat-winged perching on leaves. Its caterpillars use legume host plants, and it remains common wherever wooded habitat with such plants survives.

Frequently Asked Questions

What is the common lascar butterfly?

The common lascar butterfly is a brush-footed butterfly, Pantoporia hordonia, with orange-brown bands on dark wings. It lives in forests and wooded areas across India. It is known for its flap-and-glide sailing flight.

Where is the common lascar found in India?

The common lascar is found in forests and wooded areas of peninsular India, the Western Ghats, the Himalayan foothills and the north-east. It also occurs in Sri Lanka and South-East Asia. It prefers shaded paths, forest edges and places with its host plants.

What do common lascar caterpillars eat?

Common lascar caterpillars eat the leaves of leguminous trees and climbers in the pea family, including Senegalia (Acacia) species. The female lays eggs on these plants. The butterfly’s range therefore follows the presence of its host plants.

How can you tell a common lascar from a sailer butterfly?

You can tell a common lascar from a sailer butterfly by its orange-brown bands and by the band arrangement on both wings. Many sailers have white or yellowish bands instead. Both groups fly with a similar sailing style, so a close look at the pattern or the underside is needed.

Why is it called a lascar?

It is called a lascar because the word lascar, used in South Asia and the Indian Ocean region for sailors, suits the butterfly’s sailing, gliding flight. The name is a descriptive common name, not a scientific one. Other related butterflies, such as the extra lascar, share the term.

Is the common lascar butterfly rare?

The common lascar butterfly is not rare and is not generally regarded as threatened. It is widespread and uses common host plants. Its numbers can still fall locally when woodland is cleared.

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