**_Lazy pre-"Jaws" nature-nuns-amok flick_** Myriad swamp creatures (frogs, snakes, alligators, lizards, scorpions, tarantulas, crabs, etc.) vengefully attack a crotchety old man's Southern mansion in the swamp. Apparently, they’re hopping mad about the toxic chemicals used to exterminate them, not to mention pollutants in general. The film stars Ray Milland as the old grump, a mustache-less Sam Elliott and a young Joan Van Ark. "Frogs" (1972) predates "Jaws" by a few years. The creators were obviously going for a swamp version of the basic "The Birds" plot. The difference is that "The…