I've never seen a frog or turtle in my yard, and only one snake about 10 years ago. It was a garter snake, so it was welcome to stay, but it moved on down the road. My Dad used to take me to catch garter snakes when I was a kid, and when we'd get home, there would be a jar on the porch, and the house would be locked up! Mom wasn't about to let us bring it inside! So, we'd always go to my Dad's sisters house, and I'd chase my cousins around with them. Nick and Matt where scared to death of snakes, and I took full advantage of that fact!
What I'd really like to get are some toads for the garden. They are excellent at keeping the slug population down, and I've got a bad problem with those.