Megachilidae: Leafcutter Bees (Megachile)

categories: Bees Megachilidae Pollinators

last review date: 2025-06-17 01:47

Leafcutter bee on purple flower.
Leafcutter Bee (Megachile sp.)
Photo by: D. James

Biology

Leafcutter bees are solitary bees, and as their name suggests, cut 0.25-0.5 inch circular pieces of leaves or petals from which to construct their brood cells in rotting wood, stems and soil.

They construct cigar-like nests that contain several cells. Each cell contains a ball of stored pollen and a single egg and therefore produces a single bee.

Leafcutter bees are moderate to large bees (0.4-0.8 inches long) with about 140 species in North America. The females carry pollen on a patch of dry hair on the underside of the abdomen.

Chemical Management

IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides.

  • None recommended


cougar head logo

WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.