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Cornelian
Insects diurnal

Cornelian

Deudorix epijarbas

A flash of brilliant orange in the garden, the Cornelian is a master of speed and spirit. This vibrant member of the 'blue' butterfly family is a territorial gem that brings a splash of cornelian-red to the tropical backyard.

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Quick Identification

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Size

Wingspan ranging from 34-44 mm (1.3 to 1.7 inches)

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Colors

Males are brilliant orange-red with broad black borders; females are a duller ochreous or brownish-orange. Both have grey-brown undersides with white-edged wavy lines.

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Key Features

  • Brilliant orange-red upper wings in males
  • Distinctive white-edged 'line' patterns on the underside
  • Short, slender tail on the hindwing with a nearby eye-spot
  • Fast, erratic darting flight pattern

When You’ll See Them

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Activity pattern diurnal
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Peak hours 9:00 AM - 2:00 PM
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Season Year-round in tropical regions; peaking during the fruiting season of local host plants.
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Diet Adults feed on flower nectar; larvae are specialized fruit-borers that eat the seeds and pulp of pomegranates, lychees, and various wild fruits.
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Habitat Forest edges, tropical scrub, orchards, and suburban gardens with host fruit trees.

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Behavior

The Cornelian is a high-energy butterfly known for its rapid and aggressive flight. Males are highly territorial and are frequently seen 'perching' on prominent leaves at the edges of clearings or in gardens. From these vantage points, they dart out to intercept other butterflies or investigate potential mates, often returning to the exact same leaf minutes later.

Unlike many butterflies that are purely nectar-focused, the Cornelian's life cycle is intimately tied to fruiting trees. They are somewhat unique in that their caterpillars are 'borers,' meaning they live and feed inside the fruit of their host plants. This behavior often brings them into close proximity with humans in orchards and suburban backyards where fruit trees like pomegranate, lychee, or horse chestnut are grown.

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Camera Tips

To capture the Cornelian on camera, you must focus on 'territory' rather than just food. Males are creatures of habit; identify a sun-drenched leaf on the edge of a fruit tree where you see a butterfly frequently returning. Mount your camera 4-6 feet off the ground, angled toward these sunny perches. Use a high shutter speed or 'burst mode' if available, as their movements are incredibly fast and can easily result in motion blur on standard settings.

Because the Cornelian is a 'Line Blue' butterfly, its most intricate details are on its underside. To capture these delicate white patterns and the tiny hindwing tails, place your camera near flowering shrubs like Lantana, Ixora, or Hibiscus. These butterflies tend to feed with their wings closed, offering a perfect profile view. Ensure your camera is positioned to avoid casting a shadow over the flower, as these butterflies are sensitive to sudden changes in light and will bolt if they perceive a moving shadow.

Seasonality is key for this species. If you have pomegranate or lychee trees in your yard, set your cameras when the fruit is young. Females will be searching for egg-laying sites, while males will be patrolling the area to find females. Since insects are small, if your AI camera allows for 'zone' settings, narrow the trigger zone to the specific branch or flower cluster you are monitoring to reduce false triggers from wind-blown leaves.

Similar Species

Species that look similar or are commonly confused with Cornelian.

Guava Blue

The Guava Blue is generally more violet-blue on the upper side compared to the bright orange-red of the male Cornelian.

Common Tit

The Common Tit has much longer tails on the hindwings and different underside markings without the distinct Cornelian 'lines'.

Frequently Asked Questions

Cornelian butterflies are most active during the warmest parts of the day, typically from mid-morning (9 AM) to early afternoon (2 PM). They rely on direct sunlight to maintain the energy levels required for their fast, darting flight.
The best way to attract Cornelians is by planting host fruit trees like pomegranate, lychee, or horse chestnut. Additionally, providing nectar-rich flowers such as Lantana and keeping a small 'puddling' area of damp sand or mud can encourage them to stay in your yard.
Adult Cornelian butterflies primarily drink nectar from a variety of flowering plants. However, as caterpillars, they are fruit-borers that eat the internal seeds and pulp of specific fruits, making them unique among many backyard butterflies.
Yes, they are quite common in suburban areas throughout South and Southeast Asia and coastal Australia, particularly in neighborhoods with well-established gardens and fruit orchards.
The male Cornelian is distinguished by its intense, solid orange-red upper wings with black borders. You can tell them apart from other 'blues' by the specific white-edged 'line' patterns on their greyish underside and their remarkably fast, territorial flight behavior.

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