In the western deserts of North America, there lives a lizard called the Side-Blotched Lizard. Feeding mainly on arthropods, these reptiles breed in the summer. When researchers examined the morphology of these lizards, they found something interesting. Among the lizards, three distinct color patterns were found on their throats.
The researchers were surprised that three morphs existed in the population. As the species is reasonably old (3 million years), we would expect that due to at least random fluctuations, one of the morphs would 'win' out and get fixed in the population. Assuming that all three morphs are equivalent in fitness, we can simulate as follows:
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