Aggressive mimicry

Definition

A form of mimicry in which a predator, parasite, or parasitoid deceives its prey or host by adopting signals—visual, chemical, acoustic, or behavioral—associated with a harmless organism, an inanimate object, or a desirable resource, thereby avoiding detection until the attack or infection is initiated. Distinguished from defensive mimicry (where the mimic benefits by appearing dangerous or unprofitable) and from camouflage (concealment without signal deception).

Etymology

From Latin aggressio (attack) + Greek mimos (imitator); coined in contrast to defensive mimicry to emphasize the active, offensive function of the deception.

Example

Female fireflies of the genus Photuris mimic the species-specific flash patterns of females from other genera (such as Photinus) to attract and consume the responding males—a case of predatory aggressive mimicry. In another example, certain crab spiders (Thomisidae) assume the coloration and posture of flower parts to ambush pollinating insects.

Synonyms

• Peckhamian mimicry

Related Terms

• defensive mimicry
• Batesian mimicry
• Müllerian mimicry
• camouflage
• countershading
• molecular mimicry
• Parasitoid
• luring behavior

Usage Notes

Specialists restrict this term to feeding-related exploitation, excluding cases like sexual deception in orchids (which is pollinator deception, not predation) or human hunting disguises. The boundary with 'luring' can be fuzzy: aggressive mimicry specifically involves signal mimicry of a recognized model, whereas simple luring may use generic attractants without mimetic specificity. Not all deceptive predators are aggressive mimics—some rely on camouflage or sit-and-wait ambush without signal deception. The alternative term 'Peckhamian mimicry' honors arachnologists George and Elizabeth Peckham but remains rare in current literature.