My mother sometimes has uninvited house guests....mice....and she was told that you can use toy snakes to scare them away. She bought a couple very convincing wooden snakes placing one in her garage and the other in the kitchen closet.
This Summer when mom was on vacation in Renfrew, I dropped by regularly to check on her home. One night I was greeted by a chubby little mouse, who was sitting smack dab in the middle of the kitchen floor and did not seem the least bit fazed by my presense or that of my vicious guard dog Timmi.
Before I left mom's place on this particular evening, I moved the toy snake from the closet to the middle of the kitchen floor. Perhaps when I was gone the mighty mouse would see the fake snake and flee from mom's home.

And did the snake that scared the daylights out of the neighbour do the same for the mouse? Hardly!!. It was back the next night, boldly scooting into the dining room and right past Timmi. I eventually captured it in a bowl and tossed it outside, far from mom's house, pleading with the little critter to please stay away as he might not be so lucky next time.
As for those wooden snakes? I guess mice are smart enough to know that real snakes don't come with a Dollarama sticker and the words "Made in China". Now if we can only get mom's neighbour to figure that out.