Bug Identifier
Acorn Weevil
Community identification

Acorn Weevil

Curculio glandium

Order & Family
Order: Coleoptera; Family: Curculionidae
Size
4 mm to 8 mm (excluding the long rostrum or snout)
See this bug in the Encyclopedia

Natural Habitat

Found in deciduous forests and woodlands, particularly near oak trees.

Diet & Feeding

Adults feed on the leaves and fruit of the oak tree; larvae live and feed inside acorns.

Behavior Patterns

The female uses her long snout to drill a hole into a developing acorn to lay eggs. Once the acorn falls, the larva emerges and borrows into the soil to pupate, sometimes staying underground for 1 to 2 years.

Risks & Benefits

They are harmless to humans and do not bite or sting. While they can damage a significant percentage of an oak's acorn crop, they are a vital part of the ecosystem as a food source for birds and small mammals.