The rest of the body may be yellow, light or dark brown. It is covered with irregular stripes that vary in shade. The dark stripes merge on the upper side of the body to form a set of stripes running perpendicular to the body. The underside of the body may be white or pink with dark spots. Skin coloration is conditioned by geographic locations. Eastern populations tend to be paler with a reddish tint while northern and eastern ones darker and brown with more noticeable stripes.