I was under the impression that all you had to do was re-orient them by putting a branch in front of the entrance to make them realize things were different. I have to move one a mile next week and was planning on just using the branch. I hope it works.
I'm lucky enough to have a couple of places where I can temporarily place a hive for a couple of days if I need to move them. If you don't and have to move a hive then try the other way. I would be curious to know how well it worked for you.
The older beekeeping "rule" if you will is two feet or two miles. Many report success with moving a shorter distance and placing something like a leafy branch over the entrance so they notice something has changed.
A half mile is about the worst. Are there other hives still at the old location? If so the ones who don't figure it out will go there and it won't be that much of a loss. If not, they tend to go back and then circle to find the new location, however a 1/2 mile is a lot of spiral circles to get back... where 100 yards isn't so bad...
Still anything to get them to reorient will help. Branch. Knocking the hive around... etc.
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