The moth Biston betularia on bark
Bildnummer 11909649
| Moth camouflage. Two colour varieties of peppered moth Biston betularia on the bark of a tree. These two colour forms,light (above) and dark (beneath),are a famous example of evolution. In nature the light colour of this moth is most common. A light colour camouflages the moth on lichen-covered bark of trees,protecting the moth from bird predators. In 1840s England,industrial pollution turned trees a sooty black. The darker moth (occurring as a genetic mutation) was better camouflaged on sooty trees,and within 50 years became the commonest form. The light moth was seen and preyed upon by birds,an example of natural selection | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Nuridsany, Claude / Perennou, Maria |
| Bildgröße: | 2388 px × 3418 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: |
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