|There are many species but the ones I've seen around here look like this, with a distinctive forked rear end.|
But I don't hear about this happening in our neck of the woods, and neither have I ever seen a case of it. I'm eternally grateful for this, but I don't get it. The best explanation I've found so far is that they don't like dry areas. Perhaps they have an aversion to central air conditioning, which is absent from many northern abodes.
I don't know. It may remain one of life's great and fortuitous mysteries.