They don't like wool. We were down at Fat Beeman's (I don't know why he uses that name, he isn't fat at all! in Lula back in February. It was the first warm day, but earlier on that morning it had been down in the low thirties. Don told us he'd gone out into the beeyard with a wool hat on and they wouldn't leave him alone. Then he realized why! Wool is an animal product, again, they think it's a predator going to rob them (well, eventually, they're right, aren't they?!) :-D