As an aside, if you need to catch a live vole, mouse etc, use a Wellington - lie it down close to small creature, it sees a dark place to hide, runs into the wellie, you can then grab the top to stop the blighter escaping, and take it outside. They can be a bit reluctant to come out, but lying the wellie down in undergrowth will usually encourage an escape to freedom.we use this trick regularly as our cats often bring us live "presents!"