 During the courting season , males leave their home ranges for <unk> and ridges where they establish their own mating courts . These <unk> can be up to 7 kilometres ( 4 mi ) from a kakapo 's usual territory and are an average of 50 metres ( 160 ft ) apart within the lek arena . Males remain in the region of their court throughout the courting season . At the start of the breeding season , males will fight to try to secure the best courts . They confront each other with raised feathers , spread wings , open beaks , raised claws and loud <unk> and growling . Fighting may leave birds with injuries or even kill them . 
