A California walking stick insect that has evolved to
produce individuals with two distinct appearances—an all-green form that
camouflages well with broader leaves and a form with a white stripe running
down its back that blends better with needle-like leaves—can markedly affect
its broader ecological community when the appearance of the bug is mismatched
with the plant it’s living on.
The new findings, based on research carried out at the
University of Colorado Boulder, illustrate the ability of rapid evolution to
cause a cascade of ecological impacts.