Founding Queens Trapping Summary

Spring is behind us, and it’s time to take stock of the trapping of founding queens this 2024.

Selective Trapping Above All

The keyword for this trapping campaign was selectivity above all. Ornetin stands out from other traps on the market for its selectivity, which has been widely demonstrated in summer and fall with the trapping of Asian hornet workers. We also aimed to demonstrate its effectiveness for trapping founding queens.

Results were not guaranteed because trapping queens is very different from trapping workers. Firstly, due to their low numbers, and secondly, because they need to be attracted over a wide area, requiring more attractive baits. In this context, the goal of selective trapping is even more ambitious. During this period, we followed and applied the recommendations for spring trapping.

Explore Lorenzo Pons’ latest article on spring trapping for Asian hornet foundresses. Learn essential techniques and strategies to protect your apiaries effectively. Read more at Spring Trapping and enhance your trapping efforts this season!

When to Install Traps

This season was unique with highly variable weather, making trapping somewhat unpredictable. We started spring trapping around March 15. A minimum average temperature of 15°C is required for Asian hornet queens to emerge from their winter hiding spots. To assist trappers, we established a Velutina Flight Index that provides a department-level indication of conditions over the next five days.

Discover when and where to effectively install traps with our comprehensive insights into the Asian Hornet founding Queens’ Flight Index. This detailed map outlines average hourly temperatures across departments, guiding trappers to strategic locations where temperatures exceed 10°C—the critical threshold for trapping success. Learn more at Asian Hornet founding Queens Flight Index.

Bait for Spring Asian Hornet Trapping

We chose to start the campaign with baits recommended by the French national plan against Asian hornets: 1/3 blonde beer, 1/3 red fruit syrup, and 1/3 white wine. This bait proved to be effective for trapping queens. We tested this bait in various conditions and formats (liquid, soaked, gelatinous). The liquid and gelatinous formats worked very well.

Trap Placement

Undoubtedly, the best location for traps is under beehives (if you have them). Beehives are a strong attractant for founding queens, and at some point during the day, they will come and visit. Similar to summer, placing traps under beehives, in the shade, and along the trajectory of Asian hornets is highly effective and selective.

Trapping Methodology

As advised in the national plan, we filled out the trapper’s record sheet with trapping information. This is essential for proper monitoring and compiling results at the end of the period. Selective trapping is demonstrated through numbers and images!

In this sheet, we noted captures of Asian hornets as well as other species. At each harvest, we recorded the contents of the traps and counted them systematically. From the first pass, it was clear that Ornetin’s selectivity for founding queens was also very high. We observed relatively few collateral effects, mainly some mosquitoes and ants.

However, our goal is to further enhance the effectiveness of selective trapping. Therefore, we worked on options to prevent the drowning of hornets and other insects. The objective is to keep queens alive for as long as possible and allow other insects to exit without difficulty.

Harvest #2


Harvest #3


Harvest #4

Trapping Table

Asian hornet queens trapping table
Asian hornet queens trapping table

Ornetin’s Selectivity Review


The campaign trapped 38 founding queens between March 15 and May 9. Regarding collateral effects, we also captured 4 bees, 2 wasps, 7 flies, 42 midges, and 133 ants.
Ants were attracted to the sweet bait, prompting us to hang the trap to limit their access. Although this did not completely solve the problem, it helped reduce it.

It is noteworthy that no Vespa crabro or butterflies were trapped. Only the German wasp remains captured, which is our main focus for future monitoring.

Marking the Asian Hornet Queen for Insights


Discover our initiative to mark the Asian hornet queen, a pivotal step in understanding colony dynamics and identifying potential replacements. Follow our close observation of a spring nest, alongside trapping efforts, to explore the intricacies of hornet behavior. Experience the challenges and insights of this unique project in our informative video. Watch the process unfold here: We Marked the Asian Hornet Queen!

What to Learn More About Trapping and Settlement of Asian Hornet Queens?


In recent years, the Asian hornet (Vespa velutina) has emerged as a critical concern for beekeepers and environmentalists, given its aggressive nature and impact on honeybee populations. Our series, “101 Spring Trapping,” transforms complex scientific research into engaging posts aimed at making science accessible to everyone Simplifying Science: Series on Asian Hornet Queen Settlement and Trapping. Explore the seasonal behaviors and ecological implications of Asian hornet queens as we break down complex studies into digestible insights. Also, follow @ornetin_trap for visually captivating content that informs and inspires action towards protecting our ecosystems. Join us in unraveling the mysteries of Asian hornet queens and contributing to environmental awareness!


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