I didn't see one beetle last season. This season, I didn't see any until about late July. Now I'm smashing 10-20 beetles on the inner cover when I open the hives. Having not had much experience with them, I wonder how many beetles are considered a problem? All of the hives are very strong and I tend to only see them on the inner cover when I take a peek in. What would be a number that I should start getting concerned at? I guess I'm gonna have to place some traps next season.