Evolutionary mismatch occurs in house finches when they are exposed to infectious individuals. Male house finches tend to feed in close proximity to other finches that are sick or diseased. This is due to the fact that sick individuals are less competitive than usual, in turn increasing the chances of the healthy male to win an aggressive interaction if it happens. To ensure that there is a lower possibility of losing a social confrontation, healthy finches are inclined to forage near individuals that are lethargic or listless due to disease.[1] However, this disposition has created an evolutionary trap for the finches after the introduction of the MG disease in 1994. Since this disease is infectious, healthy finches will be in danger of contraction if they are in the vicinity of individuals that have previously developed the disease. The relatively short duration of the disease’s introduction has caused an inability for the finches to adapt quickly enough to avoid nearing sick individuals, which ultimately results in the mismatch between their behavior and the changing environment. [1]
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