Crypsis

Definition

The ability of an organism to avoid detection by other animals through visual, olfactory, auditory, or behavioral concealment. In arthropods, crypsis encompasses camouflage (cryptic coloration or shape), nocturnal or crepuscular activity patterns, substrate matching, masquerade as inedible objects such as leaves or twigs, and chemical mimicry of host odors. Crypsis functions as either a predation strategy (ambush hunters concealing themselves from prey) or an antipredator defense.

Etymology

From Greek kryptein, meaning 'to hide' or 'conceal'.

Example

The Indian stick insect (Carausius morosus) exhibits visual crypsis through extreme elongation of the body, twig-like coloration, and swaying movements that mimic vegetation in wind; the death's-head hawkmoth (Acherontia atropos) employs olfactory crypsis by mimicking the scent of honey bees to enter hives undetected.

Synonyms

• camouflage
• concealment

Related Terms

• masquerade
• mimicry
• Batesian mimicry
• aposematism
• cryptic coloration
• countershading
• Disruptive coloration
• nocturnality
• Thanatosis

Usage Notes

Crypsis is broader than camouflage alone, encompassing non-visual methods such as nocturnal activity and chemical concealment. Specialists distinguish crypsis (avoiding detection) from mimicry (resembling another organism) and masquerade (resembling inedible objects), though these categories overlap in practice. The term is typically used as a mass noun; 'a crypsis' is not standard usage.