Facts about Protective Coloration in Chameleons
- 05
Rapid color change in chameleons can occur within seconds, driven by nervous system signals that alter the spacing of nanocrystals within iridophore cells.
- 04
A resting chameleon typically displays cryptic coloration that blends with its background, making color change to camouflage a passive default state rather than an active process.
- 03
The skin of chameleons contains two superimposed layers of iridophores, with the upper layer acting as a tunable photonic crystal that shifts reflected wavelengths when the lattice spacing changes.
- 02
Color change in chameleons serves primarily as social communication—signaling dominance, mood, and reproductive status—rather than as camouflage against predators.
- 01
Chameleons change color primarily through active control of iridophore cells that reflect light, rather than by producing pigment directly.