Harlequins on a Wall, late 2010

Harlequins on a Wall, late 2010

Observation - Harlequins on a Wall, late 2010. Description: This is not a systematic study but the strong impression is of fewer Harlequins and sycamore aphids compared with 2009 (see previous post). It is tempting to invoke a Lotka-Volterra type mechanism whereby depletion of aphid prey by the Harlequins in on

This is not a systematic study but the strong impression is of fewer Harlequins and sycamore aphids compared with 2009 (see previous post).

It is tempting to invoke a Lotka-Volterra type mechanism whereby depletion of aphid prey by the Harlequins in one year results in fewer Harlequins the following year. However, there are other predators around and the weather was very dry in Spring 2010.
Sycamore leaf image: 25/10/2010