**What to Do if You're Bitten **
If a venomous snake bites you, move out of its striking range, then promptly remove wristwatches, rings, or constrictive clothing near the injury. Do not use a razor blade to flush the wounds or try to suck out venom with your mouth. Do not attempt to counteract the effects of the venom with electrical shock. The safest and most effective mechanical treatment is the widely available Sawyer Extractor ($20; 800-940-4464; www.sawyerproducts.com), a pump-action suction device that, if applied within the first five minutes, can extract up to 30 percent of the venom collected at the site of the bite. Then, keeping your wounded limb at or below heart level to slow the spread of venom, walk out of the woods.