physical light reflectance measurements, and behavioral experiments, has allowed researchers to quantify color patterns as birds would see and use them (Vorobyev & Osorio 1998; Endler & Mielke 2005).

Like many insects, Lepidoptera are also able to see ultraviolet light. David explains ... and humidity surrounding the developing caterpillars determines what colour pattern the next season's adult ...

Everyone has seen the iridescent rainbow patterns in an oil sheen on water.  Oil is hydrophobic, which repels water and doesn’t mix.  It spreads out across the surface of the water, and if ...