American Oil Beetle

The American Oil Beetle (Meloe americanus) is a large blister beetle known for secreting an oily defensive chemical when disturbed.

Taxonomy and Classification

  • Order: Coleoptera
  • Family: Meloidae
  • Genus: Meloe
  • Species: Meloe americanus

Physical Description

  • Length: 20–35 mm
  • Color: Dark blue or black
  • Body: Soft-bodied with a swollen abdomen

Distribution and Habitat

  • North America
  • Fields and grasslands
  • Areas with flowering plants

Behavior and Ecology

Larvae parasitize bee nests, while adults feed on plant foliage.

Management and Prevention

The defensive chemical can cause skin irritation if handled.

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