Lizards and snakes!
We bought a house this year. We now live against a hill that is almost completely undeveloped. This means that we have "wildlife" invading our back porch on a pretty regular basis. For those that grew up where I did, this is not anything particularly new or interesting. For both my son and wife, however, this is terrifying. My son has a deep rooted fear of all reptiles. My wife has the same level of terror related to Spiders. Today, Maxwell saw a garter snake in our neighbors driveway. Now he won't stay in the house at all. It will be a couple of hours before he calms down.