B. supraciliaris is usually 50 -- 60 cm ( 20 -- 24 in ) in total length ( including tail ) .
B. supraciliaris can reach 80 cm ( 31 in ) .
B. supraciliaris is usually 50 -- 60 cm ( 20 -- 24 in ) in total length ( including tail ) , but can reach 80 cm ( 31 in ) .