more or less - and not just Crabro, countless other insects will get caught
Sorry but the NBU strategy makes no sense. It is illogical, and risks being overwhelmed by weight of numbers.
We are fighting a war of invasion by Asian Hornets. When fighting wars, you strike your opponents when they are weak and most vulnerable. You hit them with overwhelming force before they establish and bring in reinforcements. You make sure any bridgehead they make is wiped out asap.
The NBU strategy is to ignore them until they have established a nest (a bridgehead) and have brought in reinforcements (young hornets) or even hide away in a nest in some outlying place. And then to try to wipe them out when they are dug into a nest possibly 15Meters in the air requiring a cherry picker to gain access.
Or hidden half way up some vertical cliff face accessible only with ropes.
Now last year some areas in France had 5,000 Asian hornet nests. That is areas not total France. It is physically impossible to destroy 50 hornets nests a week with current resources. We could be talking that kind of level of invasion all forming nests with hundreds of hornets per nest within a couple of months,
Spring trapping will catch some of these queens with minimal efforts. And minimal by catch when compared to the annual insect catch of one hornet nest.
"Let's save the by catch " is the motto. The resulting consumption by a nest which lasts say 3 months could be 3-5kg of insects.. far in excess of any sensibly manged trap.
The policy appears to fly in the face of logic. Certainly of military logic: strike your enemy at their most vulnerable.
I hope the NBU repent. The videos by Andrew Durham certainly support the above.