Editing Peppered moth (section)

=== Form names ===
In continental Europe, there are three morphs: the white morph '''''typica''''' (syn. morpha/f. ''betularia''), the dark melanistic morph '''''carbonaria''''' (syn. ''doubledayaria''), and an intermediate form '''''medionigra'''''.

In Britain, the typical white morph is known as '''''typica''''', the melanic morph is '''''carbonaria''''', and the intermediate [[phenotype]] is named '''''insularia'''''.

In North America, the melanic black morph is morpha '''''swettaria'''''. In ''Biston betularia cognataria'', the melanic allele (producing morpha ''swettaria'') is similarly dominant to the non-melanic allele. There are also some intermediate morphs. In [[Japan]], no melanic morphs have been recorded; they are all morpha ''typica''.