Insects Active during the day

Tailed Jay

Graphium agamemnon

iNaturalist Wikipedia

With its striking electric-green spots and swift, shivering flight, the Tailed Jay is a jewel of the tropical garden. This restless swallowtail is a master of movement, bringing a dash of neon color to backyard observers across Asia and Australia.

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Quick Identification

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Size

Wingspan of 85–100 mm (3.3–3.9 inches); body length approx 25–30 mm (1 inch)

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Colors

Velvet-black to dark brownish wings covered in vibrant apple-green spots and streaks; underside is a lighter violet-brown with green and pinkish-red base spots.

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Key Features

Distinctive lime-green spots on a black background
Short, pointed tails on the hindwings
Restless wing-vibration during feeding
Elegant, triangular wing shape

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

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Diet Adults feed on nectar from a variety of flowers including Lantana, Hibiscus, and Pagoda flowers. Larvae (caterpillars) feed on plants in the Annonaceae (custard apple) family, particularly the Ashoka tree and Soursop.

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Habitat Widespread in suburban gardens, urban parks, forest edges, and tropical rainforests.

Behavior

The Tailed Jay is an exceptionally energetic and restless butterfly. Unlike many other species that come to a complete standstill when feeding, the Tailed Jay is famous for its 'shivering' flight—it keeps its wings vibrating rapidly even while it probes flowers for nectar. This constant motion makes it a high-energy visitor to any garden, moving sporadically from one bloom to the next in a swift, erratic flight pattern.

These butterflies are mostly solitary, though you may see several in a single garden if host plants are nearby. Males are occasionally observed 'puddling' on damp soil to absorb essential minerals, but they spend most of their time patrolling for mates or food. They are generally bold and well-adapted to human presence, often flying quite close to observers in pursuit of nectar.

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Camera Tips

To capture a Tailed Jay on a backyard camera, your primary focus should be on their favorite nectar sources. Plants with clusters of small, bright flowers like Lantana or Ixora are magnets for this species. Place your camera on a tripod at a height of approximately 3 to 4 feet, angling it slightly downward to capture the full spread of the wings when they land. Because they are so fast, use a high shutter speed or 'burst mode' if your camera supports it to avoid motion blur.

Sunlight is your best friend when filming butterflies. Position your camera in a spot that receives full morning sun (between 9 AM and 11 AM), as this is when the Tailed Jay is most active but slightly less frantic than in the midday heat. The bright light will also help the AI sensors pick up the high-contrast green spots against the black wing background, which is essential for accurate identification.

If you want to encourage the Tailed Jay to pause for a longer duration, consider planting its larval host plants, such as the Polyalthia longifolia (Ashoka tree). Females will linger near these trees to deposit eggs on the undersides of young leaves. For a unique shot, you can also set up a 'puddling' station by keeping a small patch of soil or sand damp with a very diluted salt solution; males may land here to drink, offering a rare chance to capture them with their wings held still.

Similar Species

Species that look similar or are commonly confused with Tailed Jay.

Common Jay

Lacks the prominent tails of the Tailed Jay and has a more organized, linear pattern of pale green spots.

Common Bluebottle

Features a solid blue-green band across the wings rather than individual spots and has no tails.

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Frequently Asked Questions

Tailed Jays are most active during the sunnier parts of the day, typically from 9:00 AM to 3:00 PM. They are cold-blooded and rely on the sun's warmth to fuel their high-energy flight.

To attract Tailed Jays, plant nectar-rich flowers like Lantana and Ixora. Additionally, planting host trees like the Ashoka (Polyalthia longifolia) or Custard Apple (Annona) will encourage them to breed in your garden.

Adult Tailed Jays eat nectar from a variety of tropical flowers. As caterpillars, they eat the leaves of trees in the Annonaceae family, such as the soursop, custard apple, and camphor tree.

Yes, the Tailed Jay is one of the most common swallowtail butterflies in urban and suburban areas within its range. They are highly adaptable and often prefer garden environments over deep forests.

The Tailed Jay has distinct, short tails on its hindwings, whereas the Common Jay (Graphium doson) has much shorter, almost unnoticeable protrusions. The Tailed Jay also has more extensive green spotting across the center of its wings.

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