Colour perception, an essential aspect of human vision, enables us to interpret and interact with our environment reliably despite fluctuating illumination. At the core of this capability is colour ...

The worker gathers sugar solution from an artificial “flower” made of a transparent acrylic jar with a circular-coloured paper attached to the inside. Tsukuba, Japan—Pollinating insects such as bumble ...

Since Darwin's time, the phenomenon known as flower constancy -- i.e., where insects consistently visit the same flower type even when many others are also present -- has been understood as a passive ...