Bog turtle is another from the Pennsylvania endangered/threatened species EE package. The bog turtle is among the smallest North American turtles. Adults are 4 to 4 1/2 inches long. They live in relatively open portions of sphagnum bogs, swamps or marshy meadows with slow moving, spring fed streams or spring runs with soft bottoms. The primary reason for the bog turtle's endangered status is the draining or other destruction of its habitat. Considered the rarest of North American turtles, they are highly valued by turtle fanciers here, and possibly twice as much overseas. Many, therefore, have been illegally removed for commercial purposes. Since their habitats are widely separated, other turtles are not likely to move in and replace those removed.