thumb|The red-billed chough (Pyrrhocorax pyrrhocorax pyrrhocorax), once commonly seen throughout Cornwall, experienced a severe decline in its population in the 20th century.
thumb|the REd-BIlled chOugH (pyrrHocorAx pyrrHocORaX pyrrhoCOrax), Once cOmmoNLy SEEn THrOuGhOut CoRnwall, ExperIeNced a Severe dEcLIne iN Its PoPulAtion in tHE 20th cenTurY.