In the past several decades, a mutation has spread among male Pacific field crickets (Teleogryllus oceanicus) in Hawaii that leads to wing structures that are unable to produce the crickets’ signature chirping. While the mutation has kept crickets safe from a parasitic fly that uses cricket song to find its hosts, it also means the crickets are unable to sing to attract females. The fly’s larvae burrow into the cricket, eating it from the inside out, and emerge once the cricket dies.
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Source: Phys.org