Peppered moths in situ

Peppered moths in their natural resting places on horizontal tree branches (above) and vertical tree trunks (below). From figures 4 and 5 in Michael E. N. Majerus (2009), "Industrial melanism in the peppered moth, Biston betularia: an excellent teaching example of Darwinian evolution in action," Evolution: Education and Outreach 2(1):63-74.