Batesian mimicry

Definition

Batesian mimicry is a form of mimicry where a harmless species evolves to imitate the warning signals of a harmful species to deter predators. This evolutionary strategy increases the survival rate of the mimic by reducing its chances of being preyed upon.

5 Must Know Facts For Your Next Test

1. Named after Henry Walter Bates, who first described this phenomenon in butterflies.
2. The mimic gains protection without expending energy on producing toxins or other defenses.
3. It relies on the presence and abundance of the harmful model species for its effectiveness.
4. Predators must have prior experience with the harmful model to be deterred by the mimic.
5. Batesian mimicry can lead to an evolutionary arms race between mimics and their models.

Review Questions

• Who first described Batesian mimicry and in which organisms?
• How does Batesian mimicry benefit the mimicking species?
• Why is predator learning and memory crucial for Batesian mimicry to be effective?

Related terms

Müllerian Mimicry: A form of mimicry where two or more harmful species evolve similar warning signals to reinforce predator avoidance.

Aposematism: The use of bright coloration or other conspicuous signals by toxic or dangerous organisms to warn predators.

Crypsis: An adaptation that allows an organism to avoid detection by predators through camouflage or blending into its environment.