Insects diurnal

Keyhole Glider

Tramea basilaris

A master of the trade winds, the Keyhole Glider is a vibrant red voyager famous for its trans-oceanic journeys. With its unique 'windowed' wing patches and effortless gliding flight, it brings a touch of global wandering to your backyard garden.

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Quick Identification

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Size

Body length of 1.7-2.0 inches (45–50 mm); wingspan of 2.9-3.5 inches (75–90 mm)

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Colors

Males are vibrant cherry-red with dark brown patches on the hindwings; females are olive-brown with similar wing markings

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Key Features

Large dark brown patches at the base of hindwings containing a clear 'window' or keyhole shape
Bright red abdomen with black markings on the final segments (males)
Long, broad hindwings designed for gliding
Large reddish-brown compound eyes that meet at the midline

When You’ll See Them

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Activity pattern diurnal

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Peak hours 10 AM - 4 PM

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Season July-October (varies by region, typically following rainy seasons or warm spells)

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Diet Aerial insectivore that hunts gnats, mosquitoes, midges, and flies mid-air using its legs like a catching basket.

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Habitat Highly adaptable; found in suburban gardens, wetlands, and open fields, especially near temporary pools or ponds.

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Behavior

The Keyhole Glider is a true wanderer of the insect world, known for its incredible ability to travel thousands of miles across oceans and continents using trade winds. Unlike many dragonflies that stay close to a single pond, these insects are nomadic. They are frequently seen 'gliding' on thermals, using their broad hindwings to stay aloft with minimal effort. They are highly social during migration and can sometimes be seen in large swarms following weather fronts.

In a backyard setting, you'll likely see them patrolling high above the ground rather than perching for long periods. They are non-territorial, which is unusual for dragonflies, meaning they are less likely to chase off other insects and more likely to focus on foraging. During mating, they often form a 'tandem' or 'wheel' formation while flying, which is a spectacular sight for any nature observer.

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Camera Tips

Capturing a Keyhole Glider on camera requires a different approach than filming birds or mammals. Since these dragonflies spend most of their time in the air, you should position your camera near 'perching hotspots' if they aren't actively migrating. Look for tall, dry stalks of grass, bamboo stakes, or the tips of thin branches near a water feature. Set your camera on a tripod at roughly 3 to 5 feet (1-1.5 meters) above the ground, angled slightly upward to catch the underside of the wings against the sky, which highlights the distinctive 'keyhole' markings.

Because they move exceptionally fast, a high shutter speed or a high-frame-rate video setting is essential. If your camera supports AI-triggering, set it to 'Small Animal' or 'Insect' mode to reduce lag time. Unlike mammals, Keyhole Gliders aren't attracted to food bait, but they are highly attracted to water. A birdbath with a few flat stones for perching or a small backyard pond will drastically increase your chances of a close-up shot. Position the camera about 2 feet away from these potential landing spots for the best detail.

Lighting is your best friend with this species. They are most active during the brightest parts of the day when the sun is high. Aim your camera so the sun is behind you or to the side; this illuminates the vibrant red of the male's body and makes the translucent wings 'pop' against the background. In the late afternoon, you might catch them resting as they cool down; this is the best time for high-resolution stills as they are less likely to take flight immediately when approached by a camera lens.

Similar Species

Species that look similar or are commonly confused with Keyhole Glider.

Wandering Glider

Similar nomadic flight but has a more yellowish-brown body and lacks the dark 'keyhole' patches on the hindwings.

Red-veined Dropwing

Much smaller with bright red wing veins and a tendency to perch with wings dropped forward, lacking the large basal wing patches.

Frequently Asked Questions

These dragonflies are strictly diurnal, meaning they are active during the day. You will see them most frequently between 10:00 AM and 4:00 PM when the sun is at its strongest, as they rely on solar heat to power their high-energy flight muscles.

The best way to attract them is by providing a clean water source, such as a pond or a large birdbath with flat stones for perching. Planting native tall grasses or flowers like Joe Pye Weed gives them a place to rest and hunt for the small flying insects that make up their diet.

They are voracious aerial predators. Their diet consists mostly of mosquitoes, gnats, flies, and occasionally smaller dragonflies or damselflies, which they catch and often consume while still in mid-flight.

Yes, especially during migration periods. While they prefer wetlands for breeding, their nomadic nature means they can appear in almost any sun-drenched suburban garden that offers a water source and plenty of flying insect prey.

Look closely at the base of the hindwings. The Keyhole Glider has a large dark brown patch with a clear, transparent 'window' or keyhole shape inside it. Most other red dragonflies lack these specific 'windowed' wing patches, which are the hallmark of the Tramea genus.

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