 It has finely blotched yellow @-@ green plumage , a distinct facial disc of sensory , vibrissa @-@ like feathers , a large grey beak , short legs , large feet , and wings and a tail of relatively short length . A combination of traits make it unique among its kind ; it is the world 's only flightless parrot , the heaviest parrot , nocturnal , herbivorous , visibly sexually dimorphic in body size , has a low basal metabolic rate and no male parental care , and is the only parrot to have a polygynous lek breeding system . It is also possibly one of the world 's longest @-@ living birds . Its anatomy typifies the tendency of bird evolution on oceanic islands , with few predators and abundant food : a generally robust physique , with accretion of thermodynamic efficiency at the expense of flight abilities , reduced wing muscles , and a diminished keel on the sternum . Like many other New Zealand bird species , the kakapo was historically important to the Māori , the indigenous people of New Zealand , appearing in many of their traditional legends and folklore . It was hunted and used as a resource by Māori , both for its meat as a food source and for its feathers , which were used to make highly valued pieces of clothing . It was also sometimes kept as a pet . 
 It <a href='been_done' title='1'><mark>has</mark></a> finely blotched yellow @-@ green plumage , a distinct facial disc of sensory , vibrissa @-@ like feathers , a large grey beak , short legs , large feet , and wings and a tail of relatively short length . A combination of traits make it unique among its kind ; it is the world <a href='null_genetive' title='2'><mark>'s</mark></a>only flightless parrot , the heaviest parrot , nocturnal , herbivorous , visibly sexually dimorphic in body size , <a href='got' title='3'><mark>has</mark></a> a low basal metabolic rate and no male parental care , and <a href='drop_aux' title='4'><mark>is</mark></a>the only parrot to have a polygynous lek breeding system . It <a href='drop_aux' title='5'><mark>is</mark></a>also possibly one of the world <a href='null_genetive' title='6'><mark>'s</mark></a>longest @-@ living birds . Its anatomy <a href='uninflect' title='7'><mark>typifies</mark></a> the tendency of bird evolution on oceanic islands , with few predators and abundant food : a generally robust physique , with accretion of thermodynamic efficiency at the expense of flight abilities , reduced wing muscles , and a diminished keel on the sternum . Like many other New Zealand bird species , the kakapo was historically important to the Māori , the indigenous people of New Zealand , appearing in many of their traditional legends and folklore . It was hunted and used as a resource by Māori , both for its meat as a food source and for its feathers , which <a href='uninflect' title='8'><mark>were</mark></a> used to make highly valued pieces of clothing . It was also sometimes kept as a pet . 
It done finely blotched yellow @-@ green plumage , a distinct facial disc of sensory , vibrissa @-@ like feathers , a bigass grey beak , short legs , large feet , and wings and a tail of relatively short length . A combination of traits make it unique among its kind ; it is the world  only flightless parrot , the heaviest parrot , nocturnal , herbivorous , visibly sexually dimorphic in body size , got a low basal metabolic rate and no male parental care , and the only parrot to have a polygynous lek breeding system . It also possibly one of the world  longest @-@ livin birds . Its anatomy typify the tendency of bird evolution on oceanic islands , with few predators and abundant food : a generally robust physique , with accretion of thermodynamic efficiency at the expense of flight abilities , reduced wing muscles , and a diminished keel on the sternum . Like many other New Zealand bird species , da kakapo was historically important to tdaMāori , thdandigenous people of New Zealand , appearing in many of their traditional legends and folklore . It was hunted and used as a resource by Māori , both for its meat as a food source and fir its feathers , which was used to make highly valued pieces of clothing . It was also sometimes kept as a pet .