Adaptive evolution of butterfly wing shape: from morphology to behaviour

Area of Science:

• Evolutionary Biology
• Functional Morphology
• Ecology

Background:

• Butterflies exhibit significant wing shape variation linked to diverse ecological niches.
• Understanding the balance between neutral and adaptive processes in wing shape evolution is a key challenge.
• Direct evidence linking butterfly wing morphology to fitness remains scarce.

Purpose of the Study:

• To review and synthesize evidence on natural and sexual selection driving butterfly wing shape evolution.
• To assess the ecological relevance of known morpho-functional links in flight.
• To identify selective pressures acting on wing shape at macro- and micro-evolutionary scales.

Main Methods:

• Literature review of functional morphology, biomechanics, and ecological studies.
• Survey of evidence for natural and sexual selection on wing shape.
• Discussion of how functional knowledge can identify selective forces.

Main Results:

• Macro-evolutionary studies show correlations between wing shape and ecology, but selective pressures are often unclear.
• Functional morphology of butterfly flight is understood, but selective forces on flight behavior and wing shape need more attention.
• Identifying selective regimes requires investigating flight behavior in ecological contexts to link performance with fitness.

Conclusions:

• Habitat, predation, and sexual selection are likely major drivers of butterfly wing shape evolution.
• Future studies should integrate wing and body morphology, and co-evolution with flight behavior.
• Investigating flight behavior in natural settings is crucial for understanding adaptive wing shape diversification.