A Description of an Excrescence in a Captive-bred Specimen of Pituophis catenifer sayi (Serpentes, Colubridae)

The bullsnake, Pituophis catenifer sayi (Schlegel 1837), has a natural distribution that extends from
southern Canada, down south through parts of central USA and northern Mexico (Conant and Collins, 1991).
Even though these snakes can attain a total length of ca. 2.5 m (Conant and Collins, 1991), and may have
an aggressive disposition (Lazaroff, Rosen and Lowe, 2006), they are occasionally kept as pets (Fitzgerald et
al., 2004; UNEP-WCMC, 2009). Herein we describe an abnormal outgrowth in a captive-bred P. c. sayi specimen.