 The red @-@ billed chough has a long association with Cornwall , and appears on the Cornish coat of arms . According to Cornish legend King Arthur did not die after his last battle but rather his soul migrated into the body of a red @-@ billed chough , the red colour of its bill and legs being derived from the blood of the last battle and hence killing this bird was unlucky . Legend also holds that after the last Cornish chough departs from Cornwall , then the return of the chough , as happened in 2001 , will mark the return of King Arthur . 
