Sherry,

Do you have a fireplace -- and if so, do you have a bird guard (cap) on it
with fairly small mesh?  Incredible as it sounds, snakes can go up and down
brick walls, and some have been known to get into a house through a chimney.
I doubt that they would actually "crawl" down a chimney.  I suspect they
enter and then then tumble part-way down.  That's just a guess, though.  I
can tell you through experience that I grew up in a rural area of Ohio.  We
lived in an old frame "farm house," and snakes can enter through
surprisingly small openings.  It helps to use the same techniques we used
for mice -- that is, look for even the smallest holes and crevices (such as,
openings beside pipes) and fill that with steel wool.  You may want to put
one of those flexible vinyl "door sweeps" on the bottom of the garage door
(and any other door that does not fit tight at the bottom).  They are really
intended to keep out water, but they also help a lot with critters.  Of
course, none of this helps much if the doors are sometimes left propped
open!

MaryL

OH MY GWAD!!!!!!  I would just die if I seen anything like that in my yard.
You poor thing.