Insects Active day and night

Formosan subterranean termite

Coptotermes formosanus

iNaturalist Wikipedia

Meet the 'super-termite' of the insect world, a master builder capable of creating underground empires with millions of residents and spectacular evening swarms.

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Quick Identification

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Size

Workers: 3-4 mm (0.12-0.16 in); Soldiers: 4.5-6 mm (0.18-0.24 in); Alates (swarmers): 12-15 mm (0.5 in) including wings

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Colors

Workers are creamy white to translucent; soldiers have pale bodies with distinct brownish-orange, oval-shaped heads; winged swarmers are yellowish-brown with translucent, hairy wings.

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Key Features

Oval-shaped soldier heads with a small pore (fontanelle) that secretes a white defensive fluid
Densely hairy wings on winged reproductives (alates) during swarming
Constructs elaborate 'mud tubes' to travel above ground while maintaining moisture
Aggressive soldier caste with large mandibles that snap shut when disturbed

When You’ll See Them

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Activity pattern Active day and night

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Peak hours 7 PM - 10 PM (Swarming activity); Workers active 24/7

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Season April-July (Swarming season)

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Diet Primarily cellulose-based materials, including live trees, structural lumber, cardboard, and paper, which they digest with the help of specialized gut microbes.

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Habitat Suburban neighborhoods, urban environments, and forest edges with high moisture and wood-to-soil contact.

Behavior

The Formosan subterranean termite is often referred to as a 'super-termite' because of its incredible colony size and destructive potential. Unlike many other termite species, a single Formosan colony can contain several million individuals and forage across an area of up to 300 feet. They are highly social, organized into a rigid caste system consisting of a king and queen, workers who gather food, and soldiers who defend the nest using chemical and physical warfare.

One of their most striking behaviors is the 'nuptial flight' or swarming. On warm, humid evenings in late spring or early summer, thousands of winged alates emerge from the colony simultaneously to find mates and establish new colonies. These swarms are often attracted to porch lights and windows, creating a visible spectacle that is often the first sign of an infestation for many homeowners.

Beneath the surface, these termites are master engineers. Because they are susceptible to desiccation (drying out), they build intricate mud tubes made of soil, saliva, and excrement. These tubes allow them to bridge the gap between the moist earth and wooden structures, effectively acting as protected highways that keep the colony hydrated while they forage for cellulose.

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Camera Tips

Capturing the Formosan subterranean termite on an AI camera requires two different strategies depending on whether you want to see the swarm or their daily engineering. To capture the famous 'nuptial flight,' position your camera near an outdoor light source, such as a porch light or a bright LED garden lamp. These winged termites are highly phototactic and will congregate in the thousands around lights on humid nights in late spring. Use a wide-angle setting to capture the scale of the swarm or a macro lens if you want to see the individual wing movements.

For observing their building and foraging behavior, look for mud tubes on foundation walls, fence posts, or tree trunks. Mount your camera just a few inches from the tube, ideally using a tripod or a ground stake. Because these termites work slowly, time-lapse photography is your best tool. Setting your camera to take a photo every 5-10 minutes can reveal the incredible speed at which a colony can construct a mud tube or dismantle a piece of wood over several days.

Since much of their activity happens in the dark or in shaded areas, ensure your camera's infrared (IR) sensors are clean. The soft glow of IR is perfect for capturing the translucent bodies of the workers and soldiers without scaring them off with bright white light. If you want to lure them into view for a close-up, place a piece of damp, untreated pine or a thick layer of wet cardboard directly in front of the lens. Within a few weeks, you may be able to film the soldiers guarding the edges of the newly discovered food source.

Similar Species

Species that look similar or are commonly confused with Formosan subterranean termite.

Eastern Subterranean Termite

Smaller colonies that swarm during the day; soldiers have rectangular-shaped heads.

Drywood Termite

Does not require soil contact or mud tubes; leaves behind distinct sand-like fecal pellets called frass.

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Frequently Asked Questions

The workers are active 24/7 underground and inside wood. However, the winged 'swarmers' are most active at night, usually emerging between dusk and midnight on warm, humid evenings from April through July.

To observe them safely, you can place damp, untreated wood or cardboard in contact with moist soil. They are also naturally drawn to outdoor security lights and porch lamps during their swarming season.

Their primary diet is cellulose. This includes structural wood, trees, cardboard, and paper. They are uniquely aggressive and can even chew through thin plastic or soft metals like lead to reach a food source.

Yes, they are highly common in suburban areas across the southern United States and Hawaii. They thrive in managed landscapes where irrigation systems and wooden structures provide both moisture and food.

Look at the soldiers' heads: Formosan soldiers have oval, teardrop-shaped heads, while Eastern soldiers have rectangular heads. Also, Formosan swarmers have hairy wings and fly at night, whereas Eastern swarmers have smooth wings and fly during the day.

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