Bees of Oregon 2025

Report Highlights

• More than 12,000 licensed pesticide applicators trained: Over 95% of participants demonstrated an understanding of bee-protection language and pollinator hazard statements found on pesticide labels.
• Bee-related pesticide incidents are trending downward: Reports submitted to Oregon’s Pesticide Analytical and Response Center have generally declined, with confirmed acute bee-kill incidents remaining rare.
• Expanded habitat education: Habitat-focused training has reached more than 5,000 people since 2018, including pesticide applicators, land managers and members of the public.
• Continued monitoring of invasive pests: Oregon agencies and researchers are tracking exotic mason bees, the Houdini fly, invasive hornets and other emerging threats to managed and wild bees.
• Oregon Bee Atlas continues to grow: The Atlas produced more than 30,000 new records in 2025 and now includes more than 180,000 specimen-based occurrence records.
• Hundreds of species documented: The report lists 567 bee species, while DNA barcoding indicates that nearly 200 additional species may be present.
• Blue Mountains lead in documented diversity: The Blue Mountains Ecoregion currently has the highest recorded bee diversity in Oregon, with 418 documented species.
• Honey bee health remains a concern: Average colony losses since 2010 were approximately 22% for commercial beekeepers and 36% for hobby beekeepers. Varroa mites remain the most significant persistent threat.

Explore the complete report for detailed data, maps, species lists and regional findings.