Thank you so much for this article. it's allerted me to this horible creature. I just read this article from UF and I'm going hunting. I know it's a weird thing to say but I do love my worms as if they were pets. They are my little helpers and I try my best to take care of them. http://creatures.ifas.ufl.edu/misc/land_planarians.htm
I have never seen this flatworms, but I am on the lookout. Probably they don't like our dry climate. I use lots of horse manure in my compost and eventually my garden which makes for a lot of healthy worms and happy plants. Love those little guys.