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These birds live in this area.There are are two types of bird variation , the black birds and the brown birds.
The struggle for survival is that the red fox also lives in this area and they prey on birds.
The Black birds have been chosen for natural selection beacause the black birds are hard to see while the brown ones are eaiser to see so the foxes get them.
In time the brown birds would die due to foxes rarely any would make it to adult hood and reproduce while the black ones will become old enough to reproduce and grow to old age.
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