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Kākāpō

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The kākāpō (*Strigops habroptilus*) is a unique species of large, nocturnal parrot.

Strigops habroptilus Mitchell
Strigops habroptilus Mitchell

It is found only in New Zealand. This bird belongs to the superfamily Strigopoidea. It is famous for being the world's only flightless parrot. It is also the heaviest parrot species on Earth.

Strigops habroptilus 1-1c
Strigops habroptilus 1-1c

Because it lives on the ground, it has developed very different physical traits than other parrots. These traits make it a fascinating subject for scientists studying evolution.

The kākāpō's body shows how birds change when they live on islands.

Strigops habroptilus (AM LB299)
Strigops habroptilus (AM LB299)

This is often called island syndrome. On islands with few predators and plenty of food, birds may lose the ability to fly. The kākāpō has a robust torso but reduced shoulder and wing muscles. It also has a diminished keel on the sternum. The keel is the part of the breastbone where flight muscles attach. Instead of flying, the kākāpō uses its short wings for balance. It also uses them to break its fall when leaping from trees.

Strigops habroptilus (AM LB299)
Strigops habroptilus (AM LB299)

These birds have many distinct physical features. Their plumage is yellow-green with dark mottling. This helps them blend into native vegetation. They have a facial disc of fine feathers that looks like an owl.

Kākāpō head
Kākāpō head

This is why some people call them "owl parrots." Their eyes are forward-facing to help them see in the dark. They also have a very strong sense of smell. A large olfactory bulb in their brain helps them find food at night. This is rare for a parrot. They also have large, scaly, zygodactyl feet. This means two toes face forward and two face backward. These feet are very helpful for climbing.

The kākāpō is sexually dimorphic, meaning males and females look different in size.

Strigops habroptilus (AM LB299)
Strigops habroptilus (AM LB299)

Adult males are much heavier than females. A male can weigh around 4 kilograms. A female typically weighs about 2 kilograms. They also use a unique breeding system called a lek. In a lek, males gather to perform displays to attract females. Unlike many other birds, the males do not provide parental care for the young. The females must care for the chicks alone.

History shows how the kākāpō has changed over time.

Naturhistorisches Museum, Kakapo
Naturhistorisches Museum, Kakapo

The Māori, the indigenous people of New Zealand, held the bird in importance. It appears in Māori mythology. In the past, the birds were hunted for their meat and feathers. In 1845, the English ornithologist George Robert Gray formally described the species. He created the genus *Strigops*. The name comes from the Greek words for "owl" and "face." The specific name *habroptilus* comes from words meaning "soft feather." This describes their exceptionally soft feathers.

The population of kākāpō is currently critically endangered.

Kakapo chicks
Kakapo chicks

For a long time, introduced predators like cats, rats, and stoats nearly wiped them out. Many conservation efforts failed until the Kākāpō Recovery Programme began in 1995. Today, known individuals are managed on four predator-free islands. In 2023, a reintroduction to the mainland at Sanctuary Mountain Maungatautari was successful. Because the population was once as low as 49 birds, they face a genetic bottleneck. This low genetic diversity causes problems like infertility. Currently, 61% of kākāpō eggs fail to hatch.

Scientists are now using advanced technology to help the species survive.

Kakapo chicks
Kakapo chicks

The Kākāpō 125+ project is sequencing the genomes of all living birds. This helps researchers understand their DNA and health. By studying their genetics, experts hope to manage breeding more effectively. This work connects biology, genetics, and conservation science. It is a massive effort to ensure this unique parrot does not disappear forever.

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🖼️ Images & Media (14)
File:Strigops habroptilus Mitchell.jpg
Strigops habroptilus Mitchell.jpg
File:Strigops habroptilus 1-1c.jpg
Strigops habroptilus 1-1c.jpg
File:Kākāpō head.jpg
Kākāpō head.jpg
File:Strigops habroptilus (AM LB299).jpg
Strigops habroptilus (AM LB299).jpg
File:Kakapohist.svg
Kakapohist.svg
File:Kakapo Trevor feeding on poroporo fruit.jpg
Kakapo Trevor feeding on poroporo fruit.jpg
File:Kakapo egg hatching.jpg
Kakapo egg hatching.jpg
051226-kakapo-billbooming.ogg
File:Kakapo chicks.jpg
Kakapo chicks.jpg
File:Naturhistorisches Museum, Kakapo.jpg
Naturhistorisches Museum, Kakapo.jpg
File:Milford Sound and Sinbad Gully -New Zealand-9Jan2009.jpg
Milford Sound and Sinbad Gully -New...
File:Stephen Bragg with kakapo chicks.jpg
Stephen Bragg with kakapo chicks.jpg

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