Well, there are two reasons:
1. I couldn't think of anything else.
2. I was, only once, referred to that little insect by my mom. Her reasoning for the reference was because ...you buzz and buzz and can sometimes be relentless when you have something in mind.
The thing is, I have been referred to other living creatures as well; a Pit Bull~ because of "not letting go of things", a Banty Chicken, because they are "small & feisty" and a crab... because, I think I was being crabby & the person knew it was my zodiac sign.
Regardless, it is what it is, as nothing else came to mind. Maybe something more appealing & catchy will buzzz by me someday.