 The red @-@ billed chough 's predators include the peregrine falcon , golden eagle and Eurasian eagle @-@ owl , while the common raven will take nestlings . In northern Spain , red @-@ billed choughs preferentially nest near lesser kestrel colonies . This small insectivorous falcon is better at detecting a predator and more vigorous in defence than its corvid neighbours . The breeding success of the red @-@ billed chough in the vicinity of the kestrels was found to be much higher than that of birds elsewhere , with a lower percentage of nest failures ( 16 % near the falcon , 65 % elsewhere ) . 
