The Timber Rattlesnake from my "Nature's Wonders Snakes of the World v3" set. They are present in the eastern United States from southern Minnesota and southern New Hampshire, south to East Texas and North Florida. Generally, this species is found in deciduous forests in rugged terrain. The prey of the timber rattlesnake are mainly small mammals, in particular mice, rats, squirrels, and rabbits, but may include small birds, frogs, and other small animals. Potentially, this is one of North America's most dangerous snakes, due to its long fangs, impressive size, and high venom yield. This is to some degree offset by its relatively mild disposition and long brumation period. Before striking, they often perform a good deal of preliminary rattling and feinting. A timber rattlesnake will always make the effort to retreat from perceived danger before deciding to attack, and if left undisturbed poses nearly no threat to the humans who encounter them.