 " Chough " was originally an alternative onomatopoeic name for the jackdaw , Corvus monedula , based on its call . The similar red @-@ billed species , formerly particularly common in Cornwall , became known initially as " Cornish chough " and then just " chough " , the name transferring from one species to the other . The Australian white @-@ winged chough , Corcorax melanorhamphos , despite its similar shape and habits , is only distantly related to the true choughs , and is an example of convergent evolution . 
