 The parent meanwhile showed little concern, resting on a rock at the edge of the sea some 30 yards away.Their only natural enemy is the skua and time must have shown that so long as the ducklings remain amongst the alleyways between the overhanging clumps little harm can befall them.Calls recorded from the adult male include a burp – a wheezy, hollow-sounding "geee-geeee", rising and falling in pitch, with a concurrent double-noted whistle.