Bug Identifier
Steel-blue Grapevines Beetle (likely an Altica species)
Community identification

Steel-blue Grapevines Beetle (likely an Altica species)

Altica chalybea

Order & Family
Order: Coleoptera, Family: Chrysomelidae
Size
4–5 mm (approximately 0.16–0.2 inches)
See this bug in the Encyclopedia

Natural Habitat

Typically found in vineyards, gardens, and woodlands near wild or cultivated grapevines and Virginia creeper.

Diet & Feeding

Herbivorous; both larvae and adults feed on the buds and foliage of grapevines and related plants.

Behavior Patterns

Adults overwinter in leaf litter and emerge in early spring to feed on buds. They display a characteristic jumping behavior when disturbed and undergo complete metamorphosis.

Risks & Benefits

No risk to humans or pets. They are considered agricultural pests because their feeding can damage young grape buds and skeletonize leaves, reducing fruit yield.