Critter control again

I've actually built a couple 'Barn Owl Boxes' .. Like a big, heavy birdhouse (It's work putting them up and you have to clean them out once a year) but I've had very good results with them keeping the front of the house 'mole-free' .. And the front yard was getting just destroyed by moles. Only down-side is you gotta have some acreage so the owls feel safe to roost in the condo you built for them.
Wouldn't work in what you would consider a 'regular' residential neighborhood.