I've watched black hornets hovering over the grass and grabbing mosquitoes which flew up. I have also watched them and yellowjackets plucking aphids off the apple trees. Of course, they will also eat an applewhen they are ripe. Although they often seem to have a malevolent demeanor, they seem to be not all bad. Just like most other things.
Nonetheless, when I see a nest in the shop, it gets sprayed. Leeper
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