I heard somewhere when I was little that a wasp can only use its stinger about five times before it dies. Regardless, we get invaded by flies and wasps at the grocery store I work at, especially now that it's nearing autumn. They're attracted to our garbage bins and smelly customers, and when the door opens about a dozen new beasts come flying in.
Fortunately, I have Weapon Specialization (fly swatter) with Improved Critical and get a +7 bonus to attack and damage. I've only had to use my Uncanny Dodge ability once when I rolled a critical miss.