Kakapo

• It is the only flightless parrot in the world.
• Males compete by giving a deep resonant boom to attract females.
• It breeds only every two to five years, tied to the mast fruiting of trees such as the rimu.
• conservaciónIt is the world's only flightless parrot, nocturnal in habit and among the most threatened, with a population monitored bird by bird by conservationists in New Zealand.

Skeleton type

Vertebrate - non-pneumatised bony skeleton, flightless bird (the only parrot species incapable of flight)

Habitat & environment

Forest and scrub on predator-free islands in New Zealand, where it was moved after nearly dying out on the mainland

Birth weight

No precise figure for hatching weight in the sources consulted

Size at birth

Downy on hatching and wholly dependent on its mother

Sexual maturity

Female: ~9-11 years | Male: ~5 years (though some sources put the start of male breeding activity as early as 4)

Gestation / incubation

~30 days

Litter / clutch size

1 to 4 eggs per clutch (~2.45 on average); it breeds only every 2-5 years, tied to the fruiting of certain trees

Lifespan in captivity

Up to 60 years documented in captivity

Sources consulted: AnAge (genomics.senescence.info); Animal Diversity Web; Birdfact; ResearchGate (Growth and fledging of kakapo); NZ Birds; Animalia.bio; PMC (hatching success study)