The Air Force ran a research program in Guam with ‘aspirin’ mixed into dead mice. Snake ate the stuff and died. The issue from the experiment was that you needed to put the aspirin within a food source (dead mice) and litter the field. You could do the same thing in the everglades.
Is a snake going to eat a dead critter? And the chances of it coming across a fairly fresh dead wabbit, would be slim, wouldn’t it?
But hey, what do I know about pythons.
Would the “aspirin” trick work with Copperheads?