National Moth Week Is Here: Why NC's Nighttime Insects Deserve a Closer Look

What National Moth Week Actually Is

National Moth Week is an annual citizen science event coordinated by the Friends of the East Brunswick Environmental Commission, a registered 501(c)(3) nonprofit, and it happens the last full week of July every year (National Moth Week). In North Carolina, the event is coordinated locally by Science Across NC, a collaborative of science museums and nature centers across the state. You do not need to attend an organized program to take part. Anyone, anywhere in NC, can participate from their own yard (Science Across NC).

Why Moths Deserve More Credit

Moths outnumber butterflies by a wide margin. Worldwide there are close to 170,000 described moth species compared to roughly 17,500 butterfly species, and both groups belong to the same insect order, Lepidoptera (Penn State Extension). That diversity matters because moths and their caterpillars sit near the base of the food web. Birds, bats, frogs, toads, and lizards all rely on them, and an estimated 96 percent of songbirds feed insects, mostly caterpillars, to their chicks.

The math behind that is stark. A single pair of chickadees needs somewhere between 6,000 and 9,000 caterpillars to raise one clutch of chicks to fledging, which works out to 350 to 570 caterpillars a day for over two weeks straight (Illinois Extension). Most of those caterpillars will become moths, not butterflies, simply because there are so many more moth species available as a food source. Take moths out of a landscape and you are not just losing an insect. You are pulling out a load-bearing piece of the food web.

The Night Shift: Moths as Pollinators

Bees and butterflies get credit for pollination because we can watch them do it in daylight. Moths do the same work after dark, and recent research suggests they may be more important to it than assumed. A University College London study found moths carrying pollen from a wide range of plant species on their undersides, including flowers not commonly visited by daytime pollinators (Xerces Society). Some relationships are so specific they border on obligate. Yucca plants are pollinated only by yucca moths, and yucca moth caterpillars in turn feed only on yucca seeds. Neither species can complete its life cycle without the other.

Artificial light works against all of this. Areas with outdoor lighting see nocturnal flower visits drop by as much as 62 percent compared to darker sites, because moths get disoriented by light instead of moving between plants. If you want to support moths beyond Moth Week, the simplest thing you can do is turn off unnecessary outdoor lighting at night.

How to Take Part

Participating does not require any equipment you do not already own.

iNaturalist will help identify what you photograph, and your observations feed into a real, usable dataset that researchers and land managers use to track species distribution over time. It is one of the few citizen science efforts where showing up with a phone and a porch light produces genuinely useful data.

If this is the kind of nighttime discovery you want to carry with you past Moth Week, the NC Native Plants Enamel Pin covers several of the species that make this region's ecology what it is, moths and their host plants included.