The color is reputed to change when the snake is agitated. They can vary from black to a mustard yellow, but are normally an olive green in appearance when young and dark olive when older, with the sides and underside distinctly lighter.
The color is reported to alter when the snake becomes agitated. They can range from black to a mustard yellow, but are typically an olive green in appearance when young and dark olive when older, with the sides and underside noticeably lighter.