Pressed metal animal tokens encased in wood

I just became a CW member and I guess I am beginning to wonder about a lot of my collectables. Here are four items which I am not sure what they are or even if they are collectables. Here the story...my wife, was given these by a friend who knew that I like animals (wildlife, domesticated, etc.)she thought I would enjoy what we thought were coasters at the time. But after trying to place any type of glass or mug on them we knew they were not coasters. I have looked all over the web to something similar and I haven't found anything. They are really neat and the detail is great, but I would just like to know what they are.