If you have a cat, chances are the cat will know where the snake is well before you do. Keep an eye on the cat's behavior and if it seems particularly interested in one spot, like it's waiting for something to come out...chances are your little bp is under/behind whatever the cat is keeping watch of.
We always know if a gecko or lizard got in the house because our cat will stare and lie in wait for it to come out from underneath the couch or wherever it's hiding.
I agree... Your best bet is to stalk the cat tonight.
~*~ Adri ~*~
0.1 BP - Kitty (but 'officially' Cleo) 2.0 Pet rats - Gir and Zim 1.0 Bunnicula - Dexter