Cryptic coloration reduces the probability of detection by matching the visual properties of the background. Effective matching may involve color, brightness, pattern scale, texture, and body orientation, as seen in bark-resting moths, leaf insects, and sandy fishes. Selection favors appearances that disrupt outlines or resemble common environmental features under the receiver's visual system. Bright warning colors do the opposite by promoting detection, resemblance to a harmful species is mimicry, and sudden color flashes are startle or deflection displays. Background matching is therefore th
Ref:
Evolutionary Analysis, Herron & Freeman, 5th Ed., Ch. 10