Insects Active at night

Virginian Tiger Moth

Spilosoma virginica

iNaturalist Wikipedia

Known for its pristine white wings and its fuzzy 'Yellow Bear' caterpillar, the Virginian Tiger Moth is a common but beautiful visitor to North American gardens. This hardy insect thrives from coast to coast, bridging the gap between wild forests and suburban backyards.

0 Sightings

0 Habitats

Quick Identification

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Size

Wingspan of 3.2 to 5.2 cm (1.25 to 2 in); larvae grow up to 5 cm (2 in) in length

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Colors

Adults are pure white with tiny black spots; the abdomen has yellow-orange sides with a row of black dots

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Key Features

Snow-white wings with sparse black speckling
Yellow-to-orange abdomen with black dorsal spots
Densely hairy 'woolly' caterpillar with variable white, yellow, or orange coloration

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 Caterpillars are generalist herbivores eating clover, grasses, dandelions, and various garden vegetables; adults have vestigial mouthparts and rarely feed.

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Habitat Found in a wide variety of open habitats including suburban gardens, meadows, parks, and forest edges.

public Geographic range

Where Does the Virginian Tiger Moth Live?

The Virginian Tiger Moth is a native resident of North America, where it enjoys a massive geographic footprint. Its range extends from the Atlantic coast all the way to the Pacific, covering nearly the entire continental United States. It is also found throughout the southern provinces of Canada, particularly in areas with temperate climates that support its wide variety of host plants. This adaptability allows it to thrive in both lush rural environments and densely populated urban centers.

Basemap © OpenStreetMap contributors

3 Countries

15.5M km² Range

Least Concern Conservation

US United States

Marginal

CA Canada

Marginal

MX Mexico

Marginal

Elevation range

0 m1,000 m2,000 m4,000 m

Sea level – 2,200 m

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iNaturalist / Verified observation data

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Behavior

Adult Virginian Tiger Moths are primarily nocturnal, spending their nights seeking mates and their days resting quietly on the undersides of foliage. They are frequently attracted to artificial light sources, which is often how homeowners first encounter them. Despite their bright white appearance, they are masters of remaining still and inconspicuous during daylight hours to avoid predation.

The larval stage, commonly known as the Yellow Woolly Bear, is far more active and visible than the adult. These caterpillars are famous for their rapid crawling speed as they migrate between host plants or search for pupation sites in the fall. Unlike the closely related Isabella Tiger Moth (the banded woolly bear), which is said to predict winter, the Virginian version is more uniform in color but equally hardy, surviving cold temperatures by producing a natural antifreeze in its tissues.

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Camera Tips

To capture the Virginian Tiger Moth on your backyard camera, the most effective strategy is to leverage their attraction to light. Set up your camera facing a white wall or a hung bedsheet illuminated by a UV 'black light' or a standard porch bulb. This setup, known as a moth sheet, provides a flat, high-contrast background that makes it much easier for AI identification software to pick out the moth's white silhouette and the subtle black spots on its wings.

For capturing the caterpillar stage, the 'Yellow Woolly Bear,' you should move your camera to ground level. Position the lens about 6 to 10 inches off the ground along the edge of a garden bed or a walkway. These caterpillars are quite mobile in late summer and autumn; a camera with a fast trigger speed is essential as they can move surprisingly quickly across the field of view.

When photographing or filming the adults, be wary of 'white-out' caused by your camera's flash. Because these moths are incredibly bright white, a standard infrared or white LED flash can overexpose the image, erasing the delicate black dots that distinguish them from other white moth species. If possible, use a diffused light source or adjust your camera's exposure settings downward to preserve the fine details of the wings and the colorful abdomen segments.

Similar Species

Species that look similar or are commonly confused with Virginian Tiger Moth.

Fall Webworm Moth

Smaller in size and lacks the bright yellow-orange coloring on the sides of the abdomen.

Agreeable Tiger Moth

Very similar but usually has a pure white abdomen without the yellow/orange lateral patches found on the Virginian.

Isabella Tiger Moth

The adult is tan or yellowish rather than pure white, and the caterpillar is the famous black-and-orange banded woolly bear.

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Frequently Asked Questions

Adult Virginian Tiger Moths are strictly nocturnal and are most active during the middle of the night, typically between 9 PM and 3 AM. However, their caterpillars, the Yellow Woolly Bears, are active throughout the day and are often seen crossing paths in the afternoon.

The easiest way to attract adults is by using a light trap or a simple UV light against a white sheet. To attract the caterpillars, maintain a diverse garden with host plants like clover, dandelions, and various native shrubs, and avoid using broad-spectrum pesticides.

As caterpillars, they are generalists that eat almost any low-growing green plant, including grasses, weeds, and garden vegetables. The adult moths have very short lifespans and do not typically feed, focusing all their energy on reproduction.

Yes, they are very common in suburban environments. They are highly adaptable and often thrive in the 'edge' habitats created by residential gardens, lawns, and nearby wooded patches.

Look at the abdomen and the wings. The Virginian Tiger Moth has a few small black dots on its white wings and a distinctive yellow-orange abdomen with black spots. The Fall Webworm Moth, which is also white, usually lacks the orange abdominal coloring.

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