The jet black form of the peppered moth (Biston betularia) is also know as the form.

The jet black form of the peppered moth (Biston betularia) is known as the "melanic form." This variation became prominent during the Industrial Revolution in England due to the increased pollution which darkened surfaces and provided a survival advantage to darker moths against predation. The lighter form, which was more common before industrialization, became more susceptible to being seen and eaten by birds on soot-covered trees. The phenomenon is a classic example of natural selection, where the environmental changes favored the melanic form, illustrating the interplay between genetics and environmental factors in evolution. The changes in the population dynamics of the peppered moth are also a key example in studying evolution and adaptation in real-time.