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They're upset and open their mouths, there is white lining that's where the word cottonmouth comes from. >> they can cause a fairly serious bite but there is an enormous amount of tissue damage. >> reporter: riding along with director bob nations of shelby county preparedness, i ask him about all of the treacherous and fleeing animals. have you seen alligator? >> there was a report of two over on the mississippi banks yesterday. water moccasins, we're getting a lot of reports on the snakes. >> reporter: that's the big problem, in a way, isn't it, because they're going to be in people's homes e...

Mouths, there is white lining that's where the word cottonmouth comes from. >> they can cause a fairly serious bite but there is an enormous amount of tissue damage. >> reporter: riding along with director bob nations of shelby county preparedness, i ask him about all of the treacherous and fleeing animals. have you seen alligator? >> there was a report of two over on the mississippi banks yesterday. water moccasins, we're getting a lot of reports on the snakes. >> reporter: that's the big problem, in a way, isn't it, because they're going to be in people's homes even when they go back. and it...