Here's a thread that has lots of different ideas and techniques for finding an escaped snake:



http://www.ball-pythons.net/forums/s...ad.php?t=35923


And if you use the site's Search function, keyword: escaped ...you'll find lots more.

Check under all the cushions of the couch...and you may have to rip out the lining underneath it to see if she crawled up inside it.

Just keep looking. It's possible for her to go upstairs, but I would bet real money on her having stayed downstairs.