I received these same snake photos in a Power Point Presentation long before Katrina. They were tagged as photos after Hurricane Lili in 2002. I saved the pps file to my hard drive at the time because I thought they were 2cool, that file is dated 10/29/2002. The properties show the author of the slide show as a Chuck Landry.
I received these and other photos of storms and boats in really rough water that were attributed to Katrina but I had seen previuosly seen those photos long before Katrina.