51- EMPLOYEE SAFETY AND SECURITY - Home | US Forest Service

53.3 - Poisonous Snakes, Spiders, and Scorpions . Rattlesnakes, copperheads, and water moccasins (cottonmouths) are poisonous snakes known as pit vipers. They have vertically el. liptical (egg-shaped) pupils, a heat-sensing pit midway between the eyes, and nostrils on each side of a triangularly shaped head. ................
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