description Buck moth Overview
The buck moth, Hemileuca maia, is a day-flying saturniid moth native to parts of eastern North America. Adults are associated with oak-dominated habitats and are often seen in the fall, while the larvae feed on oak and other host plants. Caterpillars have clusters of hollow, urticating spines that can cause a painful reaction when touched.
help Buck moth FAQ
How can I identify a buck moth?
Hemileuca maia is a dark, day-flying saturniid with a pale band across the wings, and males often have a reddish abdominal tip. A typical wingspan is about 2-3 inches, and the species is associated with oak habitats ([Massachusetts species guide](https://www.mass.gov/info-details/buck-moth)).
When do buck moths fly?
Adults usually fly in the fall, often on sunny days around oak trees, with the exact window varying by region. A single generation occurs each year, and northern records commonly begin in late September or October ([University of Florida life-cycle guide](https://ask.ifas.ufl.edu/publication/IN834)).
Are buck moth caterpillars dangerous to touch?
Their hollow, branched urticating spines can deliver a painful sting, so do not handle them bare-handed. If one contacts skin, avoid rubbing it and seek medical help if the reaction is severe.
What do buck moth caterpillars eat?
They feed mainly on oak leaves, including several Quercus species, and young larvae may cluster together before spreading out. Eggs overwinter on oak twigs and hatch when new growth appears in spring ([University of Florida guide](https://ask.ifas.ufl.edu/publication/IN834)).
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