We have resident Fiddlers. They're like friendly little ninjas. Occasionally I will come home to a little ninja sitting on the front door thresh, waiting patiently to be let in. Other times I will walk out to find that one has been crushed by human foot, unaware.
On the day of the Great Ninja Occupation, both invading critters were trapped humanely and returned to the marsh's edge...after a bit of matching wits. Lil' guys are smart- and fast. I could see their little eyes watching me as I schemed to block or trap them- and in response they would flatten their little bodies and dart to the next corner/hiding spot within reach. This is when I realized I was dealing with ninjas.
The law of dominion eventually prevailed..let us *hope that it persist.
* I rarely 'conquer' a lower critter that I'm not reminded of a particular ALF episode: http://youtu.be/b5DWbVDzitw