What biological plasticity allows the Cape Cobra to display colors other than yellow?

Polymorphism, including entirely black or various shades of brown individuals

The Cape Cobra exhibits significant color variation, a phenomenon known in biology as polymorphism, meaning the species maintains multiple distinct color forms within its population. Although frequently recognized by its striking yellow coloration, individuals can also be found that are entirely black or display various shades of brown. This variation is strongly suggested to be driven by localized camouflage needs within specific South African microclimates, where different background environments might favor one coloration over another, perhaps balancing the need for effective warning signals against the need to avoid detection by certain predators or manage thermal absorption.