Pituophis catenifer sayi

f11 @ 1/800s, ISO:1600, Nikon D3S w 500mm

"Bullsnake," Wikipedia, the free encyclopedia. Bull snakes can be found throughout central United States, central and northern Mexico, Saskatchewan, Alberta, and desert regions of British Columbia, Canada. Though some bull snakes can be docile, and with some time become accustomed to handling, most bull snakes are quite defensive and known for their perceived "bad attitude". When bull snakes detect live objects too big to be prey they seem to perceive the object as a predator and take defensive action. Their first action is to remain quiet, not moving. Then when they feel they are able to move away from the object their next line of defensive is to move away as quickly as possible. Bull snakes, however, are not fast movers and often have to take other defensive actions. When threatened by anything as large as a human, a bull snake's next defensive action is to rear up and make itself look as large as possible while at the same time hissing at the perceived threat. It typically then begins lunging and retreating at the same time in order to escape.
Jones Alta Vista Ranch, Jim Hogg County, Texas