Insects Active at night

Bright-line Brown-eye

Lacanobia oleracea

iNaturalist Wikipedia

A common but beautiful garden visitor, the Bright-line Brown-eye is easily identified by its striking white 'W' marking and warm russet tones. It is a master of the night, fluttering through backyards across Eurasia in search of nectar.

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Quick Identification

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Size

Wingspan of 34–45 mm (1.3–1.8 inches)

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Colors

Forewings are typically a rich reddish-brown or russet, featuring a prominent white subterminal line and an orange-tinted kidney-shaped spot.

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Key Features

Distinctive white subterminal line forming a 'W' shape
Orange-brown reniform stigma (the 'brown-eye')
Reddish-brown to dark brown forewings
Greyish-white hindwings with darker veins

When You’ll See Them

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Activity pattern Active at night

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Peak hours 9 PM - 3 AM

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Season May-September

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Diet Adults feed on nectar from flowers such as Red Valerian, Honeysuckle, and Buddleia. Larvae are generalists, eating dock, nettle, fat-hen, and garden crops like tomatoes and cabbage.

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Habitat Highly versatile; found in gardens, hedgerows, woodland edges, marshes, and agricultural fields.

Behavior

The Bright-line Brown-eye is a common and highly adaptable moth that is a frequent visitor to suburban gardens and agricultural land. As a nocturnal species, it spends its daylight hours resting in a state of torpor, perfectly camouflaged against tree bark or within dense foliage. It becomes active at dusk, taking flight to seek out nectar-rich flowers or to find a mate.

This moth is particularly well-known for its larval stage; the caterpillars are generalist feeders and can be found on a vast array of host plants. While they are usually solitary, they can occasionally be found in greenhouses where they are sometimes considered a minor pest. In the wild, they play a crucial role in the food web, serving as a primary food source for bats, birds, and small mammals during the spring and summer months.

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Camera Tips

To capture the Bright-line Brown-eye on your backyard camera, you need to leverage its nocturnal habits. Since these moths are strongly attracted to light, placing your camera near an outdoor LED light or a specialized moth trap is the most effective strategy. Ensure your camera's infrared (IR) night vision is active, as this will illuminate the moth's reflective wing patterns without startling it. Set your camera to a high sensitivity to trigger even for small movements.

Another excellent method is to use a sugary lure, often called 'moth sugar' or 'wine roping.' Mix brown sugar, molasses, and fermented fruit or beer into a thick paste and brush it onto a tree trunk or a wooden post within view of your camera. Position the camera approximately 0.5 to 1 meter (2-3 feet) away to get clear, high-resolution shots of the moth as it lands to feed. The 'bright-line' and 'brown-eye' markings are most visible when the moth is at rest with its wings flat.

Focus your efforts during the peak flight seasons, which typically occur in two waves: one from May to June and another from August to September. Clear, humid nights with little wind provide the best conditions for moth activity. If your camera allows for macro-focusing, try to narrow the field of view to a specific flower or bait patch to capture the intricate details of the wing venation and the signature orange spot.

Similar Species

Species that look similar or are commonly confused with Bright-line Brown-eye.

Nutmeg

The Nutmeg is generally paler and lacks the bright orange tint in the kidney spot and the sharp white subterminal line.

Cabbage Moth

The Cabbage Moth is darker greyish-brown and lacks the warm russet tones and the prominent orange-brown 'eye' spot.

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Frequently Asked Questions

Bright-line Brown-eye moths are strictly nocturnal. They typically emerge shortly after sunset and remain active throughout the night, with peak activity occurring between 10 PM and 2 AM.

You can attract them by planting night-scented flowers like Jasmine or Evening Primrose. They are also highly attracted to artificial light sources and sugary baits made from fermented fruit and molasses.

Adults drink nectar from various flowers to fuel their flight. The caterpillars are polyphagous, meaning they eat a wide range of plants, including common weeds like dock and nettle, as well as vegetables like tomatoes.

Yes, they are very common in suburban and urban environments. Their ability to feed on many different garden plants makes them one of the most frequent moth species found in residential areas.

Look for the white subterminal line that forms a distinct 'W' shape near the wing edge and the orange-brown spot in the center of the forewing. These two features together are the best indicators for this species.

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