Western Tent Caterpillar Moth

To capture the fascinating life of the Western Tent Caterpillar, focus your camera efforts on two distinct phases. In the spring (April to June), look for the characteristic white silk tents in the crotches of fruit trees or willows. Mount your camera on a nearby branch or a tripod using a macro lens or a close-focus setting. Because the caterpillars are active during the day, standard trail cameras with high-resolution video can capture time-lapse footage of them emerging from the tent to feed or adding new layers of silk to their structure.

For the adult moth phase, which occurs in mid-summer, you will need a different strategy. Since these moths are nocturnal and strongly attracted to light, you can set up a 'moth wall' using a white sheet and a UV or mercury vapor light. Position your AI-powered camera to face the sheet. The moths will land and remain still for long periods, allowing for clear, detailed identification photos. Use a fast shutter speed if your camera allows, as their vibrating wings can cause motion blur even when they are perched.

Don't overlook the egg-laying stage. In late summer, keep an eye out for females depositing their egg masses on slender twigs. These look like small, varnished brown bumps. Setting a camera to record at a very close range on these twigs can provide a rare look at the beginning of the life cycle. Ensure your camera is weather-sealed, as the best activity often happens during the transition from cool nights to warm, sunny mornings.

If you are using a motion-activated camera for the larvae, set the sensitivity to high. While a single caterpillar might not trigger the sensor, a mass movement of hundreds of siblings leaving the tent usually will. Experiment with 'Photo + Video' mode to get a high-quality still for identification followed by a video clip that captures their unique 'marching' behavior along silk trails.