Insects Active during the day

Common Red Flash

Rapala iarbus

iNaturalist Wikipedia

A metallic jewel of the Asian tropics, the Common Red Flash earns its name with every sun-drenched flight. This agile butterfly is a master of the garden, blending incredible speed with a stunning coppery-red shimmer.

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Quick Identification

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Size

Wingspan of 33-41 mm (1.3-1.6 inches)

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Colors

Males feature a brilliant coppery-red upperside with dark borders; females are duller brownish-copper. Both sexes have brownish-grey undersides with a distinct white-edged transverse line.

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Key Features

Brilliant coppery-red upperside (males)
Distinctive 'tails' on the hindwings with a nearby black eyespot
White-edged dark band on the underside of both wings
Fast, erratic 'flashing' flight pattern
White-tipped clubbed antennae

When You’ll See Them

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Activity pattern Active during the day

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Peak hours 9 AM - 3 PM

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Season Year-round, with peak abundance during the post-monsoon months

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Diet Adults feed on floral nectar from various garden plants; larvae are polyphagous, feeding on the flowers and young shoots of plants like Mango (Mangifera indica), Ziziphus, and Acacia.

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Habitat Commonly found in forest edges, scrublands, coastal plains, and well-vegetated suburban gardens or orchards.

public Geographic range

Where Does the Common Red Flash Live?

Native to the Indo-Malayan realm, the Common Red Flash is a widespread beauty found throughout South and Southeast Asia. Its core range extends from the fertile plains of India and the teardrop island of Sri Lanka through the tropical forests of Thailand, Myanmar, and Malaysia, reaching as far as the Indonesian archipelago and the Philippines. It is a highly adaptable species, comfortably making its home in both pristine wilderness and the bustling greenery of suburban neighborhoods across the tropics.

Basemap © OpenStreetMap contributors

10 Countries

5.2M km² Range

Least Concern Conservation

IN India TH Thailand MY Malaysia ID Indonesia Sri Lanka Vietnam Myanmar PH Philippines Cambodia Laos

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iNaturalist / Verified observation data

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Behavior

The Common Red Flash is a high-energy butterfly known for its rapid, darting flight. Males are particularly territorial, often selecting a prominent sunlit leaf as a 'lookout' post. From here, they will aggressively chase away other butterflies, their metallic wings creating a distinctive red flash as they take flight—a behavior that gives the species its common name.

These butterflies are most active during the warmest parts of the day. While they are frequent nectar feeders, they are also commonly seen participating in 'puddling' behavior, where they congregate on damp soil or sand to mineralize. Unlike some more timid species, the Common Red Flash is relatively comfortable in human-altered landscapes, provided there are sufficient host plants and flowering shrubs.

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Camera Tips

To capture the Common Red Flash on a backyard camera, placement is everything. These butterflies are attracted to specific nectar-rich flowers like Lantana, Ixora, and Hibiscus. Position your camera within 12-18 inches of these blooms, ensuring you use a macro lens or a camera with a short focal distance to capture the intricate details of their 'tails' and wing patterns.

Because they are 'flash' fliers, standard motion-activated trail cameras may be too slow. Use a camera with a high-speed trigger or set your device to record high-frame-rate video (60fps or higher). This allows you to pull high-quality stills from the video when the butterfly momentarily perches to feed. Aim for sun-drenched spots, as these butterflies rarely visit flowers in deep shade.

Another expert tip is to create a 'puddling station' in view of the camera. Mix a bit of sea salt or compost into a patch of damp sand. The Common Red Flash, especially the males, will often land here to drink, providing a much more stable and predictable subject for your AI-powered camera to identify and photograph than when they are darting between flowers.

Similar Species

Species that look similar or are commonly confused with Common Red Flash.

Copper Flash

The Copper Flash (Rapala pheretima) usually has a deeper, more orange-copper tone and different banding on the underside.

Slate Flash

The Slate Flash (Rapala schistacea) has a much duller, leaden-blue or grey upperside compared to the bright red of the Common Red Flash.

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Frequently Asked Questions

Common Red Flash are strictly diurnal and are most active during the sunniest parts of the day, typically between 9:00 AM and 3:00 PM, when the heat allows them to maintain their high-speed flight.

You can attract them by planting host trees like Mango or Ziziphus, and providing nectar sources like Lantana or Ixora. Keeping a small patch of damp, mineral-rich soil can also attract males for puddling.

The adults feed on nectar from a wide variety of flowers. The caterpillars are more specific, eating the young leaves and flower buds of plants in the Fabaceae and Sapindaceae families, including mango trees.

Yes, they are very well-adapted to urban and suburban environments in South Asia, often found in city parks, backyard gardens, and fruit orchards.

The Common Red Flash is distinguished by its bright coppery-red upperside (in males) and the specific arrangement of the white-edged band on the brownish-grey underside, which is more uniform than in the Slate Flash.

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