Bugs

Why is it that whenever a bug is in sight my girls scream like, well, girls?! It doesn't matter what kind of bug it is... they scream. You may be thinking about my fear of spiders and conclude that I instilled this terror in my daughters. Nope. In fact, I rarely react when I see a spider, just so I don't teach my girls to fear them.
I've tried getting them to hold lady bugs. They're all for it, until the bug touches their skin. Then they frantically try to shake off the bug. Flies? Forget it. If they see a fly they freeze. Gnats? Bound to cause squeals.
Keep this little tidbit in mind: about a month ago we went to our local butterfly pavilion. Three of my girls held a tarantula. Let me repeat: three of my girls held a TARANTULA. But a fly makes them scream in terror.