In my post on how to remove voles from your garden, a reader Tomma mentioned she had caught 50 voles through trapping. I was impressed, since I have had zero luck trapping voles. Tomma recommended the following video about how to set traps and the method makes sense to me. Check it out:
Warning: there is a dead vole in the video. It is sad to kill animals, so I recommend only doing it if you have a serious infestation.