Joanna Burger & Robert T. Zappalorti 
Northern Pine Snake (Pituophis Melanoleucus) [PDF ebook] 
Its Life History, Behavior and Conservation

At the northern limit of their range, the Pine Snake (Pituophis melanoleucus) is listed as a threatened species by the state of New Jersey. They occur in the southern portion of the state in an area known as the Pine Barrens, where they are isolated from other conspecifics much farther south in Tennessee, Virginia, Kentucky and the Carolinas. The major threat that Pine Snakes face throughout their range is habitat loss. Measures to protect Pine Snakes are discussed in this book, particularly habitat protection, enhancement of known nesting areas, construction of hibernacula and protection of nesting and hibernation habitats from off-road vehicles