Boa Constrictor
http://en.wikipedia.org/wiki/Boa_constrictor
http://www.boa-constrictors.com/com/com.html
http://nationalzoo.si.edu/Animals/ReptilesAmphibians/Facts/FactSheets/Boaconstrictor.cfm
http://kids.nationalgeographic.com/kids/animals/creaturefeature/boa/
http://www.sandiegozoo.org/animalbytes/t-boa.html