 Although it is subject to predation and parasitism , the main threat to this species is changes in agricultural practices , which have led to population decline , some local extirpation , and range fragmentation in Europe ; however , it is not threatened globally . The red @-@ billed chough , which derived its common name from the jackdaw , was formerly associated with fire @-@ raising , and has links with Saint Thomas Becket and Cornwall . The red @-@ billed chough has been depicted on postage stamps of a few countries , including the Isle of Man , with four different stamps , and The Gambia , where the bird does not occur . 
