Houdini Fly Trap
$15.95
Community science is opening a new chapter in the fight against the European Houdini fly, a pest that arrived in the Pacific Northwest about a decade ago, has no predators, and has been quietly raiding Mason bee nests ever since. We’re seeing it spread to eastern US states as well.
Nicole, a community scientist in Portland, OR spent two years testing what attracts this elusive pest. After numerous trials, a Malbec wine from Argentina emerged as the top lure. The good news: Mason bees show no interest in it whatsoever.
Our new trap takes the research a step further. Two separate chambers let you test two different liquids side by side so you can compare your Malbec against another wine, a different lure, or plain water as a control.
The trap works best as part of a layered approach. Fall cocoon harvesting is still the single most powerful action you can take against the Houdini fly, and combining it with the trap during nesting season gives you year-round protection.
What’s included:
- Two-chamber trap body with perforated lid
- Mounting bracket (for under house installation)
Setup
Inside the bee house (recommended): Placing the trap inside your bee house works best. The fumes stay concentrated in the enclosed space, so the trap is more effective there. The outer mounting bracket slides off easily if you don't need it.
Outside the bee house: Mount the bracket to the underside of your bee house, add your liquids, and slide the trap in. That's it.
Two chambers allows you to experiment what attractant works for this pest. We think a cheap malbec has a front runner position. While apple cider/vinegar works for fruit flies, be careful of bycatch for non-Houdini flies.
Join the research: Run your own trials and tell us what you find at iNaturalist. We’ll share what the community discovers with the broader bee stewardship community.