Crickets on 2 Hawaiian Islands have Evolved a inability to sing.Kauai and Oahra about 10years ago -2 years apart -male craickets appeared with altered wings.Normally chirping or singing is to attract females and is done by wings rubbing together to chirp.The crickets with wing changes are phyiscally different and as stated came from separate mutations as findings in Current Biology Journal.The silent crickets area new example of Convergent Evolution. FOR MORE INFO LINK
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