We present information on the use of trees by Elaphe obsoleta (Texas Ratsnake) in a mesic pine-hardwood forest in eastern Texas. Using radiotelemetry, seven snakes (3 females, 4 males) were relocated a total of 363 times from April 2004 to May 2005, resulting in 201 unique locations. Snakes selected trees containing cavities and used hardwoods and snags for a combined 95% of arboreal locations. Texas Ratsnake arboreal activity peaked during July and August, well after the peak of avian breeding activity, suggesting arboreal activity involves factors other than avian predation.
Pierce, Josh B., Robert R. Fleet, Lance D. McBrayer, D. Craig Rudolph.
"Use of Trees by the Texas Ratsnake (Elaphe obsoleta) in Eastern Texas."
Southeastern Naturalist, 7 (2): 359-366.