Pollinating insects such as bumblebees often repeatedly visit the same type of flower, even when a variety of flowers bloom nearby. This behavior is known as "flower constancy." Darwin speculated that ...

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 ...