What detail frequently outlines the dark dorsal blotches running down the back of the Western Hognose Snake?

Outlined in dark color, often black or dark brown

The dorsal pattern overlaying the highly variable background coloration consists of a series of dark markings, referred to as blotches, running down the length of the snake's back. A key detail that often helps link these otherwise disparate color morphs together is the presence of an outline surrounding these dorsal markings. These blotches are frequently, though not exclusively, outlined in a dark color, commonly specified as black or dark brown. This outline helps to effectively break up the snake’s outline when it is situated against a mottled background, such as a patchy grassland or a forest floor. This consistent outlining feature provides a link between snakes exhibiting vastly different base colors.