I have to give credit where credit is due. Two episodes of the Walking Dead in season 4 inspired this wonderful zombie type. To be perfectly clear, Mudders are regular old zombies. There’s nothing special or unusual about them in any way. (I mean besides the fact that they are walking corpses.)
Mudders are regular zombies who have become stuck in the mud. They’ve appeared several times on the Walking Dead but in one case they appeared en mass. This is a real danger, when a group of them are stuck together. Eventually the weather will change, the rain will come and they’ll get free. Until then, they are just waiting to get out and get you. The good news is that they are easy to pick off and a moat of mud isn’t too hard to make. Get one set around your house and you’ve got a great way of slowing down the zombies and leaving them easier to take out. Just be careful you don’t get stuck in the mud yourself.