The report calls it a giant African land snail, which could be any of several species.
The story concludes:
Unfortunately the snail discovered in the Houston homeowner’s backyard woman’s backyard got away before it could be caught.
Got away? A snail got away. A snail... got away? A snail?!
How does a snail get away? You had one job!
Are you sure this isn’t a publicity stunt for this summer movie?