Bug Identifier
Ten-lined June beetle
Community identification

Ten-lined June beetle

Polyphylla decemlineata

Order & Family
Coleoptera, Scarabaeidae
Size
20 to 35 mm (0.8 to 1.4 inches) in length
See this bug in the Encyclopedia

Natural Habitat

Coniferous forests, sand dunes, and gardens in Western North America

Diet & Feeding

Adults feed on the needles of conifer trees; larvae (grubs) live underground and feed on the roots of various plants.

Behavior Patterns

Active at night and frequently attracted to lights. They are known to produce a distinct Hissing sound when disturbed by rubbing their wings against their abdomen.

Risks & Benefits

Adults are harmless to humans. Larvae can occasionally be pests in nurseries or gardens by damaging plant roots, while adults serve as food for various nocturnal animals.