Environment
Industrial Pollution
Trees are covered with light-colored lichen. Light moths are camouflaged.
Simulation
Population Distribution
Generation: 1
Total Moths: 50
Birds Hunting: 3
Light moth (typica)
Medium moth
Dark moth (carbonaria)
This simulation demonstrates natural selection using the famous peppered moth example. Before industrial pollution, light moths were camouflaged on lichen-covered trees. When pollution darkened the trees, dark moths gained the survival advantage. Watch how the population shifts when you toggle pollution on and off.